Nso Level-1 Booklet For Class-viii

Transcript

Class 8 15th Set A Year 2012 15th NSO - SET A 1 2 MENTAL ABILITY ( x − 1) is equal to _____. x (B) 2 2 1. If x = 5 + 2 6, then (A) 2. If a company sells a car with a marked price of ` 2,72,000 and gives a discount of 4% on ` 2,00,000 and 2.5% on the remaining amount then the actual price charged by the company for the car is ___. (A) ` 2,50,000 (B) ` 2,55,000 (C) ` 2,60,100 (D) ` 2,62,200 3. The characters in given matrix follow a certain trend, row-wise or column-wise. 31 17 58 87 Find out this trend and choose the missing character from the given 68 19 61 56 options. (A) 3 (C) 7 91 22 70 50 4. 2 (C) 3 (D) 2 3 (B) 6 (D) 9 10 142 11 ? The difference between simple interest and compound interest on a certain sum of money for 2 years at 4% per annum is ` 20. Then the sum is ____. (A) ` 13,500 (B) ` 12,500 (C) ` 11,500 (D) ` 15,200 5. The squares which should be shaded to make the adjoining figure symmetric is ____. (A) P and Q (B) P and S (C) Q and R (D) R and S 6. Which of the following statements is correct? (A) All rectangles are squares. (C) All rhombuses are parallelograms. (B) All kites are rhombuses. (D) All trapeziums are squares. 7. The number of two digit numbers which are both perfect squares and perfect cubes is______ . (A) 0 (B) 2 (C) 1 (D) 3 8. In the given matrix, find out which of the options completes the figure matrix? (A) (B) (C) (D) 9. The (A) (B) (C) (D) area of the adjoining polygon (not drawn to scale) is ____. 109 cm2 280 cm2 322 cm2 900 cm2 10. The sum of the digits of a 2-digit number is 12. If the new number formed by reversing the digits is greater than the original number by 54, then the original number is ____. (A) 39 (B) 93 (C) 49 (D) 23 11. In a certain code language, 'put tir fin' means 'delicious juicy fruit', 'tie dip sig' means 'beautiful white lily' and 'sig lon fin' means 'lily and fruit'. Which of the following stands for 'and' in that language? (A) lon (B) sig (C) fin (D) None of these 15th NSO - SET A 2 3 12. The given pie-chart shows the percentage of Literate and Illiterate– Males and Females in a city. The difference between the number of Literate Males and Literate Females is _____. (A) 75,000 (B) 1,500 (C) 5,000 (D) 500 13. Simplify the following expression : −51x 5 y 12 − 34 x 12 y 5 −17 x 5 y 5  3y 7 + 2x 7  2 2  3y 6 + 2x 6  2 2 (A) −  (B) ( x y )  (x y )   2 3      120 x 7 y 8 54 x 2 y 4  × ÷ 9 xy   40 x 4 y 3 6 6 2 2 (C) (3 y + 2 x )( x y ) 3 7 7 2 2 (D) − (3 y + 2 x )( x y ) 2 14. In the set of problem figures, there is a definite relationship between figures P and Q. Establish a similar relationship between figures R and S by selecting a suitable figure from the options that would replace the question mark (?) in the Problem Figures. Problem Figures P (A) (B) Q ? R (C) S (D) 15. A cistern from inside is 12.5 m long, 8.5 m broad and 4 m high and is open at top. The cost of cementing the inside of a cistern at ` 24 per sq m is ______. (A) ` 6582 (B) ` 8256 (C) ` 7752 (D) ` 8752 SCIENCE 16. A thin tube contains a thread of mercury which traps air at the end of the tube. The other end of the tube is open to the atmosphere. When the tube is turned upside down, the volume of the trapped air increases. It is (A) (B) (C) (D) because ______. The air gets hotter when the tube is turned upside down The atmosphere pushes less when it acts upwards on the mercury The pressure in the trapped air is reduced The trapped air molecules hit the mercury harder when travelling downwards 17. Which of the following does not produce a sound wave? (A) A silencer fixed gun fired (B) A bell ringing under water (C) A hammer hitting a block of rubber (D) An explosion on the moon 18. A candle is placed before a thick plane mirror. When looked obliquely in the mirror a number of images are seen from the surface of the plane mirror. Which of the following statements is correct? (A) First image is brightest (B) Second image is brightest (C) Third image is brightest (D) All images are equally bright 15th NSO - SET A 3 4 19. On holding a stainless steel spoon near our face, we see (A) Our inverted image on outer side of the spoon (B) Our erect image on inner side of the spoon (C) Our inverted image on inner side of the spoon (D) Our laterally inverted image on inner side of the spoon 20. During a thunderstorm, an observer can see lightning before hearing its thunder. Why does he see lightning before he hear thunder ? (A) Sound travels slower than light. (B) Sound needs a medium to travel through. (C) Sound cannot reflect off surfaces as easily as light. (D) Sound is not processed by the brain as fast as light. 21. The given graph illustrates the motion of an object. Which feature of the graph represent the distance travelled by the object moving at a constant speed? (A) Area S (B) Area S + area T (C) Area T (D) The gradient at point X 22. Sonic vibrations were sent down from a ship return after 2 seconds. What is the depth of the sea, if the speed of sound in water is 1.5 km s–1 ? (A) 150 m (B) 3 km (C) 1.5 km (D) 750 m 23. Which of the following planets can be seen with naked eye ? (A) Mercury, Venus, Mars, Jupiter (B) Mars, Jupiter, Uranus, Neptune (C) Mercury, Venus, Uranus, Neptune (D) Mercury, Mars, Jupiter, Neptune 24. A cook makes a pudding as shown. The pudding is placed in a very hot oven until the top of the egg whites turns brown. It is then removed from the oven. Why does the ice cream stay cold? (A) (B) (C) (D) Air is a good conductor of heat and conducts the heat away from the ice cream. Air is a poor conductor of heat and stops the heat from reaching the ice cream. The metal dish is a good conductor of heat and conducts the heat away from the ice cream. The metal dish is a poor conductor of heat and stops the heat from reaching the ice cream. 25. Read the given statements and mark the correct option. Statement 1 : When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is always in forward direction. Statement 2 : The frictional force acts only when the bodies are in contact. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false. (D) Statement 1 is false and statement 2 is true. 26. A copper disc has a circular hole drilled in it so that it can act as a washer for a nut and bolt. If this washer is heated equally all over, which of the given options will be true? Circumference of inner hole Circumference of washer (A) Remains constant Increases (B) Decreases Increases (C) Increases Decreases (D) Increases Increases 15th NSO - SET A 4 5 27. Which of the following cannot be charged easily by friction? (A) A plastic scale (B) A woollen cloth (C) An inflated balloon (D) A copper rod 28. Three students stand 2 m apart in front of a plane mirror that is 3 m long. Student Y is standing at the mid-point of the mirror. How many student(s) can see the images of the other two? (A) 0 (B) 1 (C) 2 (D) 3 29. A car driver took a total of two hours to make a journey of 75 km. He had a coffee break of half an hour and spent a quarter of an hour stationary in a traffic jam. What was his average speed during the journey? (A) 38 km h–1 (B) 50 km h–1 (C) 60 km h–1 (D) 75 km h–1 30. Taking one light year equal to 9.4 × 10 15 m and one day equal to 86400 s, what will be the speed of light in light year per day if the speed of light in m s –1 is 3 × 108 ? (C) 2.75 × 103 ly day–1 (D) 3.79 × 103 ly day–1 (A) 2.75 × 10–3 ly day–1 (B) 3.75 × 10–3 ly day–1 31. Sudha took a small amount of sulphur in deflagrating spoon and heated it over a burner. As soon as it started burning she put it in a gas jar and covered with a lid. After sulphur stopped burning she added a small amount of water in it and dissolved the gas in water by shaking it. She then tested the solution with red and blue litmus paper. What did she observe? (A) In the solution the blue litmus paper turned red. (B) In the solution the red litmus paper turned blue. (C) There was no change in the colour of litmus paper. (D) Blue litmus paper turned red and red litmus paper turned blue. 32. The given diagrams show the reactions of three metals with dilute hydrochloric acid. What are metals P, Q and R? P Q R (A) Copper Magnesium Zinc (B) Copper Zinc (C) Magnesium Zinc (D) Zinc Bubbles of hydrogen Dilute hydrochloric acid Copper Magnesium Magnesium Copper Dilute hydrochloric acid Metal P Dilute hydrochloric acid Metal Q 33. Ramesh mixed some iron filings with sulphur powder in a China dish. In another dish he mixed iron filings and sulphur powder and heated the mixture. Which of his observations is not correct? (A) Dish X shows a physical change while dish Y shows a chemical change. (B) In dish X sulphur powder and iron filings can be seen separately. (C) In dish Y a new substance is formed on heating the mixture. (D) The change which has taken place in dish Y is reversible. 34. Given below are few statements. I. When rubbed on fingers, bases give a soapy feeling. II. The salt produced in neutralisation reaction may be acidic, basic or neutral. III. Antacids are acids used to treat acidity and indigestion. Select the correct option. (A) Only I is correct. (B) Only I and II are correct. (C) Only I and III are correct. (D) All I, II and III are correct. Metal R 15th NSO - SET A 5 6 35. Few characteristics of three fuels X, Y and Z are given below. X Y Z Not easily stored or Can be stored in tanks and Can be stored in tanks and transported transported through pipes transported through pipes Extremely polluting Produce almost no pollutants Moderately polluting Identify X, Y and Z respectively. (A) LPG, Biogas, Coal (C) Petroleum, LPG, Coal (B) Coal, Natural gas, Petroleum (D) Natural gas, Cow dung cake, LPG 36. Three experiments to investigate the reactivities of three metals are shown. Chromium Aqueous nickel sulphate Result : Manganese Chromium Aqueous nickel sulphate Nickel displaced Aqueous manganese sulphate Nickel displaced Manganese not displaced What is the correct order of reactivity (most reactive → least reactive) for these three metals? (A) Chromium, Manganese, Nickel (B) Manganese, Chromium, Nickel (C) Manganese, Nickel, Chromium (D) Nickel, Chromium, Manganese 37. Four experiments on rusting are shown below. Which two experiments can be used to show that air is needed for iron to rust? (A) 1 and 3 (B) 1 and 4 (C) 2 and 3 (D) 2 and 4 38. If Raman opened the air-hole of a bunsen burner fully and lighted the burner, he will get ______. (A) A luminous flame which is orange-yellow in colour. (B) A non-luminous flame which is pale blue in colour. (C) A flame that strikes back which is thin blue or green-yellow in colour. (D) A smoky flame which gives off a lot of soot. 39. Select the correct option which on rearranging gives the term for the ground-water stored between layers of hard rock below the water table. (A) Duclos (B) Refquai (C) Ragclei (D) Pwmas 40. Observe the given apparatus carefully showing an activity performed to compare the carbon dioxide content of inhaled and exhaled air. What would be the observation for T 1 and T2 test tubes and its correct (A) (B) (C) (D) explanation? [(+) indicates milky colouration in limewater] T2 Explanation T 1 +++ ++ CO2 content is a little higher in inhaled air ++++ + CO2 content is considerably higher in inhaled air + ++++ CO2 content is considerably higher in exhaled air ++ ++ CO2 content is same in both inhaled and exhaled air 15th NSO - SET A 6 7 41. A schematic representation of the blood circulation is given. Which circulatory parts are incorrectly placed in it? (A) Right atrium and right ventricle (B) Left atrium and left ventricle (C) Pulmonary artery and pulmonary veins (D) Aorta and vena cava 42. The given figure shows different layers of a forest labelled as W, X, Y and Z. Which layer is the habitat of many animal species like monkeys, orangutans, toucans and sloths as there is plenty of food available? (A) W (B) X (C) Y (D) Z 43. Namita’s mother does not allow her to lie on the abdomen immediately after having food. What could most likely be the reason for this? (A) In stomach, food gets processed into a thick liquid called chyme. (B) Peristaltic movement gets affected throughout the digestive tract especially small intestine where digestion and absorption chiefly occurs, hence food does not properly mix with enzymes and stays undigested. (C) The small intestine, on compression, releases intestinal juices which restrict the action of digestive enzymes in the small intestine. (D) The peristaltic movement gets affected throughout the digestive tract especially large intestine where poor motility may result in greater absorption of water and thereby may cause diarrhoea. 44. Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (a) Scouring (i) Wool fibres are passed through rollers to straighten the fibres. (b) Shearing (ii) Unwinding silk fibres from a cocoon. (c) Reeling (iii) The fleece of the sheep alongwith a thin layer of skin is removed. (d) Carding (iv) Stained, damaged or inferior wool is removed. (v) Sheared hair are washed thoroughly to remove the impurities. (A) (a) - (iv), (b) - (iii), (c) - (v), (d) - (i) (B) (a) - (v), (b) - (iii), (c) - (ii), (d) - (i) (C) (a) - (v), (b) - (iii), (c) - (iv), (d) - (i) (D) (a) - (iii), (b) - (ii), (c) - (v), (d) - (iv) 45. The given figure shows an irrigation method used in agricultural practice. Which of the following is correct regarding this irrigation method ? (A) It is the best technique for watering fruit plants, gardens and trees. (B) It is a boon in regions where availability of water is poor. (C) The method provides water to the plants drop by drop at their roots. (D) All of these. 46. Latika observed her grandmother adding lots of salt on unripe mangoes to prepare pickles. Her grandmother also added excess of oil in the pickle jar. What could be the reason for it? (A) Salt prevents growth of microorganisms by retaining moisture in the food item and oil provides an environment in which microorganisms cannot grow. (B) Salt prevents growth of microorganisms by forcing them to lose water by osmosis and oil provides an environment in which microorganisms cannot grow. (C) Salt prevents growth of microorganisms by retaining moisture in the food item and oil prevents their growth by forcing out water from them by osmosis. (D) Salt prevents growth of microorganisms by forcing them to lose water by osmosis and oil prevents their growth by retaining moisture in the food item. 15th NSO - SET A 7 8 47. Look at the given cell carefully. Identify the function of the part labelled ‘Y’. (A) It controls the movement of materials in and out of the cell. (B) It controls all the activities of the cell. (C) It contains many cell parts. (D) It provides protection to the cell. 48. Match Column-I with Column-II and select the correct option from the codes given below. (a) (b) (c) (d) (e) (A) (C) Column-I Jim Corbett National Park (i) Kanha National Park (ii) Kaziranga Wildlife Sanctuary (iii) Bandipur Sanctuary (iv) Mudumalai Sanctuary (v) (a)- (i), (b)- (iii), (c)- (iv), (d)- (ii), (e)- (v) (B) (a)- (iv), (b)- (v), (c)- (i), (d)- (iii), (e)- (ii) (D) Column-II Karnataka Madhya Pradesh Tamil Nadu Uttaranchal Assam (a)- (v), (b)- (iv), (c)- (ii), (d)- (i), (e)- (iii) (a)- (iv), (b)- (ii), (c)- (v), (d)- (i), (e)- (iii) 49. Read the given statements and select the correct option. Statement 1 : Aquatic animals produce large number of eggs and sperms necessary to ensure Statement 2 : The eggs swim in water with the help of cilia, and fertilize the sperms. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false. (D) Both statements 1 and 2 are false. 50. Which of these is a behavioral adaptation? (A) A hognose snake pretends as dead to trick the predator. (B) A frog’s light-coloured belly makes it harder for a predatory fish to see it against sunlight on the water surface. (C) The scarlet king snake looks very much like the poisonous coral snake. (D) A treehopper on a leaf or twig resembles a thorn. external fertilization. SPACE FOR ROUGH WORK Class 8 15th Set B Year 2012 15th NSO - SET B 1 Mental ability 1. Five cities A, B, C, D and E are famous for their lovely gardens, fancy jewellery, educational institutes, blue pottery and scents but not in the same order and one city is famous for only one feature. (i) A and C are neither educational centres nor have gardens. (ii) B and E are not famous for jewellery or pottery. (iii) Scents and jewellery have nothing to do with A. (iv) D and E are not famous for gardens and jewellery. (v) D is not famous for educational institutes. City E is famous for which of the following features? (A) Jewellery (B) Educational institutes (C) Scents 2. A train at a uniform speed covers a distance of 350 km in 3 covered in 5 hours. (A) 100 km 3. The value of (A) 2.03 3 (B) 500 km (D) Gardens 1 hours. Find the distance the train 2 (C) 400 km 0.008 + 0.64 + 4 6.5536 + 0.0009 is ______. (B) 2.63 (C) 2.36 (D) 680 km (D) 2.13 4. It is estimated that by 2070 the population of the world will be 1.03 × 10 10. If 1.03 × 1010 = k billion. Find the value of k. (A) 1.03 (B) 10.3 (C) 103.0 (D) 1030.0 5. A die is thrown. Find the probability of getting a prime number. 1 2 (B) 2 3 (C) 1 3 (D) 1 4 (A) 6. If in the word 'ELECTROCARDIOGRAPH' the first half of the letters are reversed, second letter from left end is then prefixed and finally 'S' is suffixed, then the letter exactly in the middle is ____. (A) L 7. Which of the following statements is incorrect about a KITE? (A) It is a quadrilateral with exactly two pairs of equal consecutive sides. (B) The diagonals are perpendicular to one another. (C) One of the diagonals trisects the other. (D) None of these (B) R (C) D (D) E 8. A clock seen through a mirror shows quarter to three. The correct time shown by the clock is ______. (A) 8 : 15 (B) 9 : 12 (C) 8 : 17 (D) 9 : 15 9. If a man left one-third of his money to his daughter, one-fourth to his son and the remaining ` 20,000 to his wife, then the money man has left is ______. (A) ` 36,000 (B) ` 48,000 (C) ` 28,000 (D) ` 54,000 10. A trader sells two articles, one at a loss of 10% and another at a profit of 15% but finally there is no loss or gain. If the total sale price of these two articles is ` 30,000, then the difference between their cost prices is ____. (A) ` 5000 (B) ` 6000 (C) ` 7500 (D) None of these 15th NSO - SET B 2 11. Which of the following pairs is not correctly matched? (A) (B) (C) (D) Geometrical objects Number of vertices Triangular prism 4 Pyramid with rectangular base 5 Cube 6 Triangle 3 12. Select a figure which will continue the same series as established by the given five Problem Figures. (A) (B) (C) (D) 13. If the given pie chart shows the spendings of a country on various sports during a particular year, then the per cent of the total spendings spent on tennis is _____. 1 (A) 12 % 2 1 (B) 22 % 2 (C) 25% (D) 45% 14. Abhinav purchased a tracksuit for ` 2400 cash or for ` 1000 cash down payments and two monthly installments of ` 800 each. The rate of interest is ______. (A) 75% (B) 120% (C) 50% (D) None of these 15. Three cubes each of edge 3 cm long are placed together as shown in the figure. The surface area m 3 cm 3c of the cuboid so formed is _____. (A) 182 sq. cm (B) 162 sq. cm (C) 126 sq. cm (D) None of these 3 cm 3 cm 3 cm science 16. Read the given statements and select the correct option. Statement 1 : The velocity of sound decreases with increase in humidity. Statement 2 : The velocity of sound depends upon the density of medium. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false. (D) Statement 1 is false but statement 2 is true. 17. The given graph shows the position of a particle moving along the x-axis as a function of time. Select the correct statement about the graph. (A) The particle has come to rest 6 times during its motion. (B) The maximum speed is at t = 6 s. (C) The velocity remains positive for t = 0 to t = 6 s. (D) The average velocity for the total period shown is negative. 15th NSO - SET B 3 18. Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (a) A child running to catch the school bus (i) Force can make a stationary object to move (b) A man blowing a balloon (ii) Force can stop a moving object (c) A woman pushing a table (iii) Force can change the shape of an object (d) A cricketer catching a ball (iv) Force can make an object move faster (A) (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii) (B) (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv) (C) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv) (D) (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii) 19. The diagram shows a mercury barometer. What happens to the column height h when the mercury barometer is taken up in a balloon? (A) It decreases, because atmospheric pressure increases with height. (B) It decreases, because atmospheric pressure decreases with height. (C) It increases, because atmospheric pressure increases with height. (D) It increases, because atmospheric pressure decreases with height. h 21. The graph shows the temperature changes when wax cools from liquid to solid. At which labelled point would the wax be a mixture of solid and liquid? (A) P (C) R (B) Q (D) S Temperature (°C) 20. The light reflected by a plane mirror may form a real image ________. (A) If the rays incident on the mirror are converging (B) If the object is placed very close to the mirror (C) If the rays incident on the mirror are diverging (D) Under no circumstances P Q R S T Time (s) 22. Consider a vehicle moving on a horizontal road towards east. Neglect any force by the air, the frictional forces on the vehicle by the road _________. (A) Is towards east if the vehicle is accelerating (B) Must be towards east (C) Must be towards west (D) None of these 23. Two plane mirrors are placed parallel to each other as shown in the figure. There is an object placed at O between the mirrors at 5 cm from the mirror M2. What is the distance of third image from the mirror M2? (A) 5 cm (B) 15 cm (C) 25 cm (D) 35 cm 24. A wooden block floats in a beaker of water. The block is near the wall of the beaker as shown in the figure. If P1, P2 and P3 be the pressure at the three points A, B and C respectively at the bottom of the container, then (B) P1 = P2 < P3 (C) P1 > P2 > P3 (A) P1 = P2 > P3 (D) P2 = P3 > P1 25. During the electrolysis of dilute sulphuric acid, it splits into ________. (A) Oxygen ions and hydrogen ions (B) Oxygen ions, hydrogen ions and sulphate ions (C) Oxygen ions and sulphate ions (D) Hydrogen ions and sulphate ions 26. In an experiment to measure the speed of sound in air, a boy stands 40 m from a wall and bangs two pieces of wood together. At the instant he hears the echo, he bangs them together again. He does this activity 50 times. The time taken for 50 bangs is 12 s. Which calculation gives the speed of sound in air? 12 (A) 40 × 50 (B) 40 × 50 12 (C) 40 × 2 × 50 12 (D) 40 × 2 × 12 50 15th NSO - SET B 4 27. A boy is moving along a circular track. He covers one complete round of 30 m in 30 s. The average speed and average velocity of the boy in m s–1 is respectively ______. (A) 1, 0 (B) 0, 1 (C) 1, 1 (D) 0, 0 28. Match Column-I with Column-II and select the correct option from codes given below. Column-I Column-II (a) Insulator (i) Prevents rusting (b) Conductor (ii) Pure water (c) Electroplating (iii) Copper wire (A) (a)-(i), (b)-(ii), (c)-(iii) (B) (a)-(iii), (b)-(i), (c)-(ii) (C) (a)-(i), (b)-(iii), (c)-(ii) (D) (a)-(ii), (b)-(iii), (c)-(i) 29. Comets spend most of their time _________. (A) Far away from the sun (C) Very close to sun 30. The (A) (B) (C) (D) (B) Close to one planet or the other (D) Very close to earth length of the shadow will be longest when the _________. Angle between the source of light and the object is 45° Source of light and the object are parallel to each other Source of light and the object are perpendicular to each other Angle between the source of light and the object is 60° 31. A piece of calcium metal is placed in water. A reaction takes place in which bubbles of hydrogen gas are seen. After the reaction stops, the solution is tested for its colour, temperature and action with litmus solution. Select the correct observation. (A) The solution is hot, milky white and turns red litmus blue. (B) The solution is hot, colourless and turns blue litmus red. (C) The solution is cold, milky and turns blue litmus red. (D) The solution is cold, colourless and does not change the colour of litmus. 32. A student investigated the reactivity of four metals – iron, copper, zinc and an unknown metal X. He arranged three experimental set up as shown in the diagram. Iron Zinc Solution containing aqueous copper (II) ions Experiment 1 Metal X Solution containing aqueous iron (II) ions Experiment 2 Solution containing aqueous zinc (II) ions Experiment 3 The student observes that reaction occurred in all the three experiments. Identify the metal X. (A) Cu (B) Mg (C) Fe (D) Au 33. Four test-tubes were set up as shown in the following options. Each piece of iron was protected on one side by coating of different materials. In which test-tube is the iron least likely to rust? Water (A) Water (B) Iron Iron Grease Water (C) (D) Iron Paint Plastic 15th NSO - SET B 5 34. Match Column-I with Column-II and select the correct option from the codes given below. (i) (ii) (iii) (iv) (A) Column-I Production of biogas from animal waste (p) Dissolving sugar in water to make solution (q) Depositing a layer of zinc on iron (r) Mixing of iron with carbon and metals (s) like chromium or nickel (i)-p, (ii)-q, (iii)-r, (iv)-s (B) (i)-r, (ii)-q, (iii)-s, (iv)-p (C) Column-II Stainless steel Physical change Chemical change Galvanisation (i)-q, (ii)-r, (iii)-s, (iv)-p (D) (i)-s, (ii)-r, (iii)-p, (iv)-q 35. Which of the following statements are true? I. Yellow flames are ideal for heating. II. The substances which vapourise during burning, give flames. III. Luminous zone contains unburnt carbon particles. IV. The non-luminous zone has highest temperature. (A) I, II and III (B) I, II and IV (C) II, III and IV (D) I, III and IV 36. Observe the chemical reactions taking place in two test tubes X and Y. Which two gases are evolved in test tubes X and Y respectively? (A) Carbon dioxide and hydrogen (B) Hydrogen and carbon dioxide (C) Oxygen and carbon dioxide (D) Carbon dioxide and oxygen 37. Which of the following is an incorrect match? (A) An oily liquid formed when coal is heated in absence of air - Coal tar (B) A gas found along with petroleum in reservoirs under the ground - Natural gas (C) A thick black liquid found trapped in underground rocks - Petroleum (D) A residue left behind when destructive distillation of coal is carried out - Charcoal 38. Match Column-I with Column-II and select the correct option from the codes given below. Column-I (i) A synthetic fibre obtained from cellulose (ii) A synthetic fibre used for making woollen clothes (q) Nylon (iii) A thermosetting plastic (r) Rayon (iv) This polymer is used for making ropes and fishing nets (s) Bakelite (A) (i)-(p); (ii)-(q); (iii)-(r); (iv)-(s) (B) (i)-(r); (ii)-(p); (iii)-(s); (iv)-(q) (C) (i)-(s); (ii)-(r); (iii)-(q); (iv)-(p) (D) (i)-(p); (ii)-(r); (iii)-(q); (iv)-(s) Column-II (p) Acrylic 39. Which of the following is correct regarding the (A) (B) (C) (D) given Venn diagram? X is Venus fly trap, Y is mistletoe X is Cuscuta, Y is Monotropa X is mistletoe, Y is Cuscuta X is mistletoe, Y is mushroom 40. Sakshi wants to test the quality of her dupatta. She pulled a small strand of yarn from the dupatta and burned it. It smelled like a burning plastic. She inferred that the dupatta is made of ______. (A) Pure wool (B) Nylon (C) Pure silk (D) Cotton 15th NSO - SET B 41. Read the given statements. (i) Ingestion in Hydra occurs with the help of pseudopodia. (ii) Bile juice is secreted by gall bladder and stored in liver. (iii) In humans, digestion of starch starts in the mouth. (iv) The outer covering of teeth is called enamel and is the hardest substance in human body. (v) Omasum is the largest chamber of ruminant stomach where food is stored. Which of the above statements are incorrect ? (A) (i), (ii) and (v) (B) (iii) and (iv) (C) (ii), (iii) and (iv) (D) (i), (ii) and (iii) 42. Identify P, Q, R, S and T in the given flowchart and select the correct option. P Q R S T (A) Bulb Tuber Rhizome Bryophyllum Spirogyra (B) Stolon Layering Bulb Colocasia Lily (C) Tuber Rhizome Layering Marigold Rose (D) Rhizome Bulb Tuber Spirogyra Bryophyllum 43. 6 Vegetative propagation in plants P Q R Ginger Onion Potato Fragmentation S Leaf buds T Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (a) Phloem (i) Contain respiratory pigment (b) Arteries (ii) Translocation of food in plants (c) Red blood cells (iii) Carry oxygenated blood away from the heart (d) Xylem (iv) Have thin walls (e) Veins (v) Conducts water from roots to leaves (A) a-(v), b-(iv), c-(iii), d- (ii), e-(i) (B) a-(ii), b-(iii), c-(i), d-(v), e-(iv) (C) a-(iii), b-(i), c-(ii), d-(iv), e-(v) (D) a-(iv), b-(v), c-(ii), d-(iii), e-(i) 44. The given diagram shows respiratory system of man. Which of the following correctly shows the functions of the parts labelled W, X, Y and Z? (A) W - Facilitates movement of air by expansion (B) W - Helps in gaseous and contraction exchange X - Traps dust and helps to filter inhaled air X - Traps dust and helps to filter inhaled air Y - Prevents the wind pipe from collapsing Y - Serves as a common passage for air and food Z - Help in exchange of gases Z - Protect the lungs from damage (C) W - Prevents the wind pipe from (D) W - Facilitates movement of air by collapsing expansion and contraction X - Serves as a common passage for air and food X - Helps in gaseous exchange Y - Helps in upward and downward movement of ribcage Y - Serves as a common passage for food and air Z - Trap dust and help to filter inhaled air Z - Protect the lungs from damage 45. Which of the following on reshuffling gives the term that refers to the process of sowing seeds manually by sprinkling them on soil by hand ? (A) inigtil (B) glnopuihg (C) atnbrdocaigs (D) giownwin 46. The change in number of two species X and Y belonging to the same food chain over a period of time is shown in the given graph. Which of the following best identifies the organisms? X Y (A) Chicken Corn (B) Fox Hen (C) Grass Rabbit (D) Lion Deer 15th NSO - SET B 7 47. Correct the given statements by replacing the underlined words and select the correct option. (i) The viscous fluid present in the nucleus is called cytoplasm. (ii) Vacuoles are rod shaped structures which oxidize food to provide energy. (iii) Mitochondria contain green pigment chlorophyll and take part in photosynthesis. (iv) Lysosomes take part in synthesis of protein. (i) (ii) (iii) (iv) (A) Nucleoplasm Lysosomes Plastids Centrosome (B) Protoplasm Ribosomes Centrosome Golgi bodies (C) Nucleoplasm Mitochondria Chloroplasts Ribosomes (D) Protoplasm Plastids Endoplasmic reticulum Ribosomes 48. Identify X, Y and Z in the given flowchart and select the correct option. X Y Z (A) Pituitary gland TSH Thyroid gland (B) Adrenal gland Adrenaline Hypothalamus (C) Hypothalamus Pituitary gland Parathyroid (D) Hypothalamus TSH Pituitary gland 49. The given pie charts show the composition of three types of soil samples X, Y and Z. Which of the following is correct regarding these? (A) X is unable to hold water or nutrients. (B) Y is used for pot making. (C) Z provides good amount of oxygen to roots for breathing. (D) X is best suited for cultivation. 50. Refer the given flowchart and identify X, Y and Z. X Y Z (A) Biosphere Reserve Sanctuary National Park (B) Biosphere Reserve National Park Sanctuary (C) Sanctuary National Park Biosphere Reserve (D) National Park Biosphere Reserve Sanctuary SPACE FOR ROUGH WORK Class 8 16th Set A Year 2013 Mental Ability 1. Direction : If p * q = p 2 – q2 p $ q = p 2 + q2 p @ q = pq + p + q If p = 11 and q = 7, then the value of B. C. 6. In a survey, 240 parents of a school were asked about the number of hours spent by their children on their study (including homework) in a day. The data obtained is represented by given pie. chart From this pie chart, find the number of students in each sector in terms of percentage. A. P = 20%, Q = 20%, R = 60% B. P = 15%, Q = 60%, R = 25% C. P = 15 %, Q = 25 %, R = 60 % D. P = 20%, Q = 60%, R = 20% 7. If P and S interchanges their position & Q and T interchanges their position, then which point is north-west of R ? [(p * q) @ (p $ q)] A. C. 2. The question given below is followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/ are necessary to answer the question: 12492 14292 B. D. 14282 12482 D. What is the rate of interest p.c.p.a. ? I. An amount doubles itself in 5 years on simple interest. II. Difference between the compound interest and the simple interest earned on a certain amount in 2 years is ` 400. III. Simple interest earned per annum is ` 2000. A. B. C. D. I only II and III only Any two of the three I only or II and III only 3. If the sum of all 6's is subtracted from the sum of all 9's in the given below series, what will you get? 6 6 9 6 9 9 9 6 6 6 9 6 9 6 6 9 9 6 6 9 9 6 6 6 A. C. 4. In a zoo, there are rabbits and pigeons. If heads are counted, there are 340 heads and if legs are counted there are 1060 legs. How many pigeons are there? 9 18 B. D. A. C. 5. Which of the following is the net of the prism shown below ? (figure is not drawn to scale) A. 120 180 B. D. 6 27 150 170 P Q A. P B. Q C. T D. S 8. In the given figure, PQRS is a square and LMNP is a rectangle. A straight line is drawn from L, passes through 'N' meets at R. Side of square is square root of 100. The area of unshaded region is ____ cm2 . A. 112.5 B. 78 C. 83.3 M D. None of these L R S T Q R N P S 16th NSO - SET A 2 9. Which number will complete the number pattern given below? A. U 30 B. C. X 48 D. W 46 W 48 13. Find the odd figure out. A. B. Q S C. D. R T 10. Which of the following statements is INCORRECT? A. B. C. D. Rhombus satisfies all the properties of a parallelogram & diagonals are perpendicular to each other. Rectangle satisfies all the properties of a parallelogram. Square satisfies all the properties of a parallelogram, rhombus and a rectangle. In kite, both the diagonals do not bisect each other. 11. If A → E, B → F, C → G and H → L, then how will you code ‘GO AHEAD’? A. B. C. D. KS HP KS KS FLIFH BIFBE GLIGH ELIEH 12. In the given figure, AE = BC and AE || BC and the three sides AB, CD and ED are equal in length. If m∠ A = ( 10404 ) , find ∠BCD. A. 138° B. 162° C. 88° D. 152° 14. The given figure shows the net of a cube. Which one of the faces is the base of the cube ? A. B. C. D. T Q P T R S R S top P 15. Which of the following options is the correct mirror image of figure (X), if the mirror is placed vertically to the left? A. B. C. D. Science 16. A brick of weight 80 N stands upright on the ground as shown in the figure. The pressure exerts on the ground by brick is A. B. 5 × 10 × 10−4 N m −2 80 80 × 5 × 10–4 N m–2 10 C. D. 80 × 5 × 10−4 80 10 × 5 × 10 −4 N m −2 N m −2 17. Read the given statements and mark the correct option. Statement 1 : It is difficult to move by a cycle along the road with breaks on. Statement 2 : The sliding friction is greater than the rolling friction. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true and statement 2 is false. D. Both statements 1 and 2 are false. 16th NSO - SET A 3 18. A body is acted upon by a constant force directed towards a fixed point. The magnitude of the force varies inversely as the square of the distance from the fixed point. What is the nature of the path? A. C. Straight line Random motion B. D. Circle Can't say A. 19. Shweta observes lightning in her area. She hears the sound 5 s after she observed lighting. How far is she from the place where lightning occurs if speed of sound in air is 330 m s–1. A. C. 1.65 km 3.65 km B. D. 2.55 km 4.55 km 20. The figure shows a barrier placed at right angles to a plane mirror with four lamps at position P, Q, R and S. Which lamp can be seen by the observer? A. C. P R B. D. Q S 21. While playing a violin, in which of the following the vibrations can take place? A. B. C. D. The wire only Air only The box only Both the wire and box 22. John carried out an experiment to find out how different surfaces (P, Q, R and S) effect the distance a car travelling at 50 km/h needed to stop once the brakes are applied. The results are shown below: Type of road surfaces Stopping distance (m) P 18 Q 15 R 19 S 27 Which type of road will provide the most friction for the car to stop? A. C. P R B. D. Q S 23. Bees which are not carrying honey fly with a flapping frequency of 440 Hz while those which are carrying honey fly with a flapping frequency of 300 Hz. The sound made by bees which are not carrying honey has A. C. B. C. D. 25. Oxygen can be supplied to a fish tank by bubbling air in to water. The pressure and the volume of the air bubbles while they are rising respectively A. B. C. D. Decreases, increases Decreases, decreases Increases, decreases Increases, increases 26. By using a concave mirror, image of a tree is focused on a screen. The distance between the screen and the mirror is 24. An object of weight W is pulled along a rough, horizontal surface by a force X. The force of friction is Y. Which diagram correctly shows the direction of these forces on the object? A lower pitch A smaller loundness B. D. A higher pitch A greater loudness A. B. C. D. Equal to twice the focal length of the concave mirror. Equal to one fourth of the focal length of the concave mirror. Equal to half the radius of curvature of the concave mirror. Equal to the radius of curvature of the concave mirror. 27. A ball is dropped from a spacecraft revolving the earth at a height of 100 km. What will happen to the ball? A. B. C. D. It will continue to move with the same speed along the original orbit of spacecraft. It will move with the same speed, tangentially to the spacecraft. It will go very far in the space. It will fall down to earth gradually. 28. If °C, °F and K are the temperatures on Celsius, Fahrenhit and Kelvin scales. D°C, D°F and DK are the change in temperatures in Celsius, Fahrenheit and Kelvin scale respectively. Which relation among the following is correct? A. C. D. °C ° F K − 273 °C ° F K = = = = B. 9 5 5 5 9 5 ∆°C ∆° F ∆° K = = 5 9 5 ∆°C ∆° F − 32 ∆K − 273 = = 5 9 5 16th NSO - SET A 4 29. Solve the following riddles by identifying X, Y and Z. X : Your mother loves to cook in the utensils which are coated with me because I make them non-stick. Y : I protect the firemen by coating their uniforms to make them fire resistant. Z : I am a very familiar form of polyester and used for making bottles, utensils, films, etc. X Y Z A. Acrylic, Rayon, Bakelite B. PET, Polythene, Teflon C. Rayon, Bakelite, Melamine D. Teflon, Melamine, PET 30. Mr. Goyal, a science teacher showed the following experimental set up to the students. Which of the following is the correct observation and its explanation? A. B. C. D. The paper pan catches fire and the water spills all over the wire mesh because paper is inflammable. The paper pan has a very high ignition temperature so it does not catch fire. The water in the pan absorbs heat from the candle flame and thus prevents the paper to reach the ignition temperature. The paper pan helps the water vapours to condense back to water. 31. Match the column I with column II and choose the correct option using the codes given below. (a) (b) (c) (d) A. B. C. D. Column I Used in thermometers (i) Present in fertilisers (ii) Used to disinfect water (iii) Used as an antiseptic (iv) (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv) (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv) (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii) Column II Iodine Mercury Phosphorus Chlorine 32. Petroleum and natural gas are often found together as large deposits deep inside the earth’s crust. What is the correct order in which they are present in the earth? A. B. C. D. X Water, Water, Crude oil, Natural gas, Y Crude oil, Natural gas, Water, Water, Z Natural gas Crude oil Natural gas Crude oil 33. Fill in the blanks by choosing the correct option. Excessive use of fertilizers makes the soil _______, so it should be treated with _______ like _______. If the soil is _______ then organic matter should be added to it. A. B. C. D. Basic, acids, formic acid, acidic Basic, acids, milk of magnesia, neutral Acidic, bases, zinc carbonate, neutral Acidic, bases, slaked lime, basic 34. Study the given figures carefully and identify the types of changes shown. A. B. C. D. X and P are physical while Y and Q are chemical changes. X, Y and P are physical changes while Q is a chemical change. X is a physical change while Y, P and Q are chemical changes. All are physical changes. 35. Ritu was given four test tubes containing different solutions as shown in the figure. Choose the incorrect option. A. 1 and 2 turn blue litmus to red. B. 1 and 4 turn China rose indicator to green. C. Phenolphthalein remains colourless with 2 and 3. D. 4 turns turmeric solution to red. 16th NSO - SET A 5 36. Priya wants to carry out a fair test to find out how fast water can pass through four different kinds of soil. She sets up the experiment as shown in the figure below. She uses a stopwatch to measure the time taken for water to pass through each kind of the soil. She records her findings in the table below. Kind of soil P Time taken (in seconds) 33 Q 23 R 45 S 18 Which type of soil is suitable to grow lentils? A. S B. P C. Q D. R 37. Which of the following is incorrect for the organism as shown? A. It lives in extremely cold conditions where the water is always below the freezing temperature. B. Its body is streamlined, feet are webbed and is excellent swimmer. C. It is a solitary animal who live alone near the sea. D. It huddles together in groups to keep each other warm. A. B. C. D. He should put more water in the field to provide adequate irrigation. He should leave field free for one or more season. He should grow legume crop in next season to replenish nitrogen in the soil. Both B and C 40. A person on entering a dark room finds a snake. Due to fear his body becomes stiff and the heart starts to beat fast. Which of the following is likely to happen to his hormonal control system as shown? A. Secretion of adrenaline from part labelled Q. B. Secretion of thyroxine from part labelled P. C. Secretion of adrenaline from part labelled R. D. Secretion of TSH from part labelled Q. 41. Study the given flow chart carefully. 38. After hearing Mr. Saxena's countless and justified explanations on his problem, the doctor said, "Okay! in that case, your request for permanent contraception is granted. I shall sterilize you on the 18th December 2013. You will have all your male characteristics intact, so don't worry." 42. Study the given figures and select the correct statements regarding these. Which of the following procedure Mr. Saxena will be going through? A. in vitro fertilization B. His vas deferens will be cut and tied C. His seminal vesicle will be removed D. His prostate gland will be removed and testes will be cut and tied. 39. Ramu, a farmer, grew wheat on the same field for many years. He noticed that the yield of wheat is decreasing every year. What do you think he should do to rectify this? Which of these is/are incorrect in the above flow chart? A. Asiatic lion and lion tailed macaque B. Vulnerable species C. Dodo D. Golden cat and chinkara deer (i) Figure X represents a unicellular alga. (ii) Figure Y represents a parasitic protozoan. (iii) Organism in figure X cannot synthesize its own food. 16th NSO - SET A 6 (iv) Organism in figure Y shows mixotrophic mode of nutrition. A. (i), (ii), (iii) and (iv) B. (i) and (iv) C. (i), (iii) and (iv) D. (ii) and (iii) 43. Rita wants to study the process of respiration in animals. She sets up an experiment using five insects of the same species and size as shown in the setup below. She provides the insects with food and water above S which removes the end product of respiration. 44. Select the correct sequence of words to fill up the blanks in the given paragraph. Wool is the _____ of a sheep. It is removed from the sheep by a process called ______. When it goes to mill, wool is cleaned to remove dirt and grease by a process known as ________. Clean wool is _______ to remove tangles. Long and soft wool strands are spun into _____ which is woven on looms. A. B. C. D. Hair, Shearing, Carding, Scoured, Yarn Fleece, Scouring, Shearing, Carded, Yarn Hair, Shearing, Scouring, Carded, Fabric Fleece, Shearing, Scouring, Carded, Yarn 45. Refer the given figures and select the incorrect option. Which of the following is correct regarding the given set-up? A. B. C. D. S is KOH and is used to remove CO2. By measuring the height moved by red-coloured water in glass tube, Rita can measure the volume of air used by the insects for respiration. Rita should set-up a control by preparing the same set-up without the insects. Both A and B A. B. C. D. P reproduces vegetatively by underground stem called rhizome. Q reproduces asexually by buds on its leaves. R reproduces by the process of fragmentation. S reproduces by the process of budding. Achievers Section Direction (Q. 46 & 47) : Refer the given passage and answer the following questions. The graph in the figure shows the position of a body at different times. 48. Consider the following statements (a – d) each with one or two blanks. (a) At puberty the (1) begins to grow in boys, which protrudes out in the throat region as Adam's apple and marks the (2) of adolescence. (b) Every cell has (3) lifespan. (c) On reaching the uterus, the embryo attaches to the wall of uterus by (4) . This is called (5) . 46. What is the speed of the body as it moves from A to B? A. 1 cm/s B. 2 cm/s C. 3 cm/s D 4 cm/s 47. What is the speed of the body as it moves from C to D? A. 1 cm/s B. 4 cm/s C. 8 cm/s D. 2 cm/s (d) Some factories use (6) to remove particles of solids such as carbon dioxide from waste gases before they are let out into the atmosphere. A. B. C. D. 2-End, 4-Umbilical cord, 5-Pregnancy, 6-Catalytic converter 1-Larynx, 3-Indefinite, 5-Implantation 1-Pharynx, 2-Start, 4-Umbilical cord 1-Larynx, 3-Definite, 4-Placenta, 6-Electrostatic precipitators 16th NSO - SET A 7 49. Kunal performed an activity using the shown experimental set up. C. D. P is CO2 , Q turns lime water milky. P is CO2 gas, Q is hydrogen gas. 50. As proved by many studies greenhouse effect is rapidly increasing because of increase in concentration of carbon dioxide. In the given graph the increase in carbon dioxide concentration is shown. What could be X corresponding to it? The balloon tied on bottle 1 rose and float away while that on bottle 2 could not. Choose the correct statement about the gases filled in the two balloons. A. B. P burns with a pop sound and Q is hydrogen gas. P is hydrogen gas, Q turns lime water milky. (i) (ii) (iii) (iv) A. C. SPACE FOR ROUGH WORK Rate of photosynthesis in plants pH of the oceans Water level of ocean Average global temperature of earth (i) and (iii) B. (ii) and (iv) (ii) only D. (iv) only Class 8 16th Set B Year 2013 Mental Ability 1. 2. Which of the following statements is true? A. Integers are rational numbers but fractions are not. B. Fractions are rational numbers but integers are not. C. Neither integers nor fractions are rational numbers. D. Integers and fractions are rational numbers. A direction pole was situated on the crossing. Due to an accident the pole turned in such a manner that the pointer which was showing East, started showing South. One traveller went to the wrong direction thinking it to be West. In what direction actually he was travelling? A. East B. West C. North D. South 3. If 3a = 4b = 6c and a + b + c = 27 29 , then a 2 + b 2 + c 2 is A. 3 29 B. C. 87 D. 4. There are 23 steps to reach a temple. On descending from the temple Mohit takes two steps in the same time. Rohit ascends one step. If they start to work simultaneously, at which step will they meet each other? A. 11th B. 9th C. 10th D. None of these 5. 81 9 29 2 Two positions of a cubic block are given below, each face having small triangles. If there is a triangle at the bottom, how many triangles will be there on the top face? 7. The line graph shows the number of sandwiches sold each day at a shop. If the shop earned a profit of 60 paise for every sandwich sold, how much profit did the shop earn in one week? A. C. 8. In the given question, which number will replace the question mark? A. 2 B. 3 C. 4 D. 5 9. ` 636 ` 742 B. D. ` 1060 ` 128 18 24 32 12 14 16 3 4 72 112 128 Direction : There is a question followed by three statements I, II and III. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question. In how many days can P and Q working together to complete a job? I. P alone can complete the job in 30 days. II. Q alone can complete the job in 40 days. III. Q takes 10 days more than P to complete the job. A. I and II only B. II and III only C. I and III only D. Any two of the three A. 4 B. 3 C. 2 10. The given figure shows two rectangles. D. 5 6. The figure shows a cuboid with a square face. The perimeter of this square face is 20 cm. The volume of the cuboid is 525 cm3. Find the length of p. A. 50 cm B. 102 cm C. 20 cm D. 21 cm ? If q is four times as much p and q is twice as much as r, what is the value of r? A. 18° B. 54° C. 36° D. 72° 16th NSO - SET B 2 11. What will the solid look like if viewed from the top? A. C. 13. Consider the figures X, Y and Z showing a sheet of paper folded and punched as shown in figures. Select the figure from the options which will most closely resemble the unfolded position of figure (Z). B. D. 12. Which of the following options will continue the series in the problem figure? A. B. C. D. A. B. C. D. 14. If = 34.03 kg and = 39.590 kg, then = ? A. 121.42 B. C. 45.56 D. 55.56 65.89 15. The given cuboid is made up of white unit cubes. The outside of the cuboid is then painted blue. How many unit cubes are not painted blue on any of their surfaces? A. 4 B. 8 C. 12 D. 16 Science 16. Two blocks A and B are released at the top of a rough inclined plane so that A slides along the plane and B falls down freely. Which will have higher velocity on reaching the ground? A. A B. B C. Both will reach the ground with same velocity D. It depends on the coefficient of friction 17. Two plane mirrors are inclined to each other at an angle of 60°. If a ray of light incident on the first mirror is parallel to the second mirror, it is reflected from the second mirror A. Perpendicular to the first mirror B. Parallel to the first mirror C. D. Parallel to the second mirror Perpendicular to the second mirror. 18. A piece of ice is floating in a beaker containing water. When ice melts, the temperature falls from 20°C to 4°C and the level of water A. Remains unchanged B. Falls C. Rises D. Change erratically 19. Two wave pulses travel in opposite directions on a string and approach each other. The shape of one pulse is inverted with respect to the other. A. The pulse will collide with each other and vanish after collision. B. The pulses will reflect each other, that is pulse going towards right will finally move towards left and vice versa. C. The pulses will pass through each other but their shapes will be modified. D. The pulses will pass through each other without any change. 16th NSO - SET B 3 20. John carried out an experiment to find out how different surfaces (P, Q, R and S) effect the distance a car travelling at 50 km h–1 needed to stop once the brakes are applied. The results are shown below Which type of road will provide the most friction for the car to stop? A. P B. Q C. R D. S 21. A particle follows a path XY as shown in the given figure. If the radius of semi-circular path is 2 cm then the approximate value of distance covered and displacement of the particle are respectively. A. C. 20 cm and 10 cm 20 cm and 60 cm B. D. 30 cm and 23 cm 63 cm and 40 cm 22. Read the following statements and select the correct option. Statement-1 : A convex mirror is preferred over a plane mirror in vehicles to observe traffic coming from behind. Statement-2 : Images formed by convex mirror are erect and diminished in size. A. Both statements-1 and 2 are true and statement-2 is the correct explanation of statement-1. B. Both statements-1 and 2 are true but statement-2 is not the correct explanation of statement-1. C. Statement-1 is true and statement-2 is false. D. Both statements-1 and 2 are false. 23. Lunar eclipse occurs when earth comes in between sun and the moon. Solar eclipse occurs when moon comes in between sun and earth. This suggests that A. Both eclipses occur on a new moon day. B. Solar eclipse occurs on a new moon day. C. Lunar eclipse occurs on a new moon day. D. Both eclipses occur on a full moon day. 24. At particular time of a day, the ratio of height of an object and the length of it’s shadow is x. Using this, calculate the height of a tree if the length of the shadow of tree is L. x B. x × L A. L C. x + L D. L–x 25. The given figure shows a beaker containing a solution of copper sulphate and two carbon electrodes. A battery is placed next to it. In order that the electrode E be plated with copper ____. A. E must be connected to H and F to G B. E must be connected to F and H to G C. E must be connected to G and F to H D. E and F must be connected to G 26. The temperature of the substance remains constant when it is melting and boiling though some quantity of heat is supplied. What happens to this energy? A. It is dissipated as sound energy. B. It is consumed to increase the energy of the molecules. C. It is used to change the state of the substance. D. It is still an unsolved problem in science. 27. Match Column-I with Column-II and mark the correct option. Column-I Column-II (a) Richter scale (i) Electric Charge (b) Electroscope (ii) Amber (c) Resin (iii) Earthquake (d) Electric current (iv) Flow of charges A. a-(iv), b-(ii), c-(i), d-(iii) B. a-(iii), b-(i), c-(ii), d-(iv) C. a-(i), b-(iii), c-(iv), d-(ii) D. a-(ii), b-(iv), c-(i), d-(iii) 28. Which graph shows the relationship between the pressure and volume of a fixed mass of a gas in a container at constant temperature? A. B. C. D. 29. Any article of iron if left in open for some time, acquires a film of brownish substance (rust) having chemical formula________. A. Fe3O4 B. Fe2O3 C. FeO D. Fe(OH)2 16th NSO - SET B 4 30. Raman was given four slips with one problem written on each slip. Four bottles labelled from 1 to 4 were kept in front of him. a. Excessive use of 1. Magnesium fertilizers in the soil hydroxide b. Too basic soil 2. Zinc carbonate c. Ant bite 3. Organic matter d. Indigestion 4. Calcium hydroxide Identify the bottles that he should pick as remedy for each of the given problems. A. a-3, b-2, c-4, d-1 B. a-3, b-4, c-1, d-2 C. a-2, b-3, c-1, d-4 D. a-4, b-3, c-2, d-1 31. Ms. Chopra, a science teacher prepared two solutions for practical test as follows: Solution 1 : Dissolved the ash collected after burning the magnesium ribbon in water. Solution 2 : Added dilute sulphuric acid to lime water. She asked a student to test the solutions with China rose indicator and write the change in colour. Choose the correct observation among the following. A. Solution 1 → Red, Solution 2 → Green B. Solution 1 → Green, Solution 2 → Pink C. Solution 1 → Red, Solution 2 → Pink D. Solution 1 → Green, Solution 2 → Green 32. I am a man-made fibre, stronger than a steel wire. Some of my uses are shown in the figures: II B. D. Acrylic Rayon 33. Liquid and gaseous fuels have more advantages over solid fuels. Some of the advantages are : (i) Calorific value of liquid and gaseous fuels is higher than the solid fuels. (ii) Liquid and gaseous fuels have higher ignition temperatures than the solid fuels. (iii) Liquid and gaseous fuels are easier to store since solid fuels occupy lot of space. (iv) Liquid and gaseous fuels burn completely not leaving any residue. (i), (iii) and (iv) (i), (ii) and (iv) 34. Read the following statements carefully and identify P, Q and R. P : Obtained from petroleum and natural gas and used in the manufacture of man-made plastics. Q : Due to its great commercial importance, it is also called 'black gold'. R : Obtained from natural gas and used in the production of fertilizers. P Q R A. Petrochemicals, Petroleum, Hydrogen gas B. Coke, Coal, Coal tar C. Paraffin wax, Coal tar, Diesel D. Bitumen, Coke, Coal gas 35. Few uses of metals are shown below. X I Who am I? A. Polyester C. Nylon Choose the correct advantages. A. (i), (ii) and (iii) B. C. (ii), (iii) and (iv) D. Y Z Identify the properties which are responsible for the uses X, Y and Z respectively. A. Conductivity, Malleability, Ductility B. Ductility, Malleability, Sonorous C. Sonorous, Malleability, Ductility D. Malleability, Ductility, Sonorous 36. Match Column I having characteristics of gas exchange surfaces with Column-II having their respective purposes and select the correct option. Column-I Column-II (a) Moist surface (i) Keeps high concentration gradient of gases (b) Single layer (ii) Allows faster diffusion of epithelial of gases cells (c) Well ventilated (iii) Allows gases to dissolve (d) Large surface (iv) Allows larger amount of area gases to diffuse A. a-(iii), b-(iv), c-(ii), d-(i) B. a-(iii), b-(ii), c-(i), d-(iv) C. a-(i), b-(ii), c-(iii), d-(iv) D. a-(ii), b-(iv), c-(iii), d-(i) 16th NSO - SET B 5 37. The given figure shows a part of digestive system. Identify it and select its main function. A. Gall bladder : Carries the digested food to all parts of the body. B. Part of pancreas : Produces digestive juices to digest the food in small intestine. C. Villus : Makes a large surface area for the effective absorption of digested food. D. Oesophagus: Helps the movement of undigested food into the large intestine. 38. Read the following statements and select the correct option. Statement 1 : Wind pollinated flowers need to produce more quantities of pollen grains. Statement 2 : Seeds from cross pollinated flowers produce weaker and less healthy plants. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true but statement 2 is false. D. Both statements 1 and 2 are false. 39. Which of these can be found in a tropical rainforest? A. Sloth and Lion-tailed macaque B. Camels and Cacti C. Lemmings and Penguins D. Arctic tern and Siberian cranes 40. Refer the given figure and select the option which correctly describes parts labelled as W, X, Y and Z. Codes: a. Contains hereditary materials b. Most chemical reactions occur here c. Made of mainly sugar molecules d. Partially permeable A. B. C. D. W a a a b X c b b a Y d c d c Z b d c d 41. Mrs Renu came to know about Mrs Sunidhi's pregnancy, but she became anxious as Mrs Sunidhi smokes badly. She knew that smoking may affect the health of the mother and developing foetus. Among the following, what are the consequences of smoking? (i) Increased heartbeat and blood pressure in the mother due to release of adrenaline. (ii) Increased blood supply to the placenta. (iii) Blood clot formation in the arteries of the mother leading to the diffusion of CO2 and urea into the foetus' blood. (iv) Reduced ability of haemoglobin to carry oxygen in the RBC, which may affect the development of the foetus' brain. A. (ii) and (iii) B. (i), (ii) and (iv) C. (i) and (iv) D. (ii) and (iv) 42. Which of the following statements is incorrect for the organism shown in the figure? A. B. C. D. This organism became extinct due to over exploitation. The category to which this organism belongs also contains Quagga and Tasmanian wolf. This organism is listed in Red Data Book. This organism is critically endangered due to continuous illegal poaching. 43. Sewage contains several dissolved and suspended impurities which pollute the water and leads to various changes. These are (i) Water becomes green (ii) Eutrophication (iii) Underwater plants die (iv) Light cannot penetrate the water (v) Depletion of dissolved oxygen (vi) Death of aquatic organisms (vii) Aerobic bacteria feed on dead plants In which order these changes take place? A. (i) → (ii) → (iv) → (iii) → (vii) → (v) → (vi) B. (ii) → (i) → (iv) → (vi) → (v) → (iii) → (vii) C. (i) → (ii) → (iv) → (iii) → (vii) → (vi) → (v) D. (ii) → (i) → (iv) → (iii) → (vii) → (v) → (vi) 44. Which of the following groups represents the bacterial diseases? A. Cholera, tuberculosis, malaria, measles B. Small pox, tuberculosis, malaria, typhoid C. Cholera, tuberculosis, typhoid, measles D. Cholera, anthrax, tuberculosis, typhoid 16th NSO - SET B 6 45. The given figure shows the nitrogen cycle. Match the following table according to the given figure and select the correct option. Bacteria Letters (a) Able to form nodules (i) R (b) Able to denitrify (ii) Q (c) Able to nitrify (iii) S (d) Able to use ammonium (iv) T with plants as energy source (e) Able to fix nitrogen from air a b c (v) P d e A. (iv) (v) (i)/(ii) (i) (ii)/(v) B. (v) (iv) (iii) (iv) (v) C. (v) (iii) (i) (iv) (ii) D. (v) (iv) (i)/(iii) (i) (ii)/(v) Achievers Section Direction (Q. 46 & 47) : Refer the given passage and answer the following questions. A mirror of length 2X is kept in front of a road as shown in figure. A point object is kept at a distance X from the mirror. An observer is able to see the image till distance 12 X while moving along the road. 48. Bacterial growth is the division of bacteria into its daughter cells. When bacteria are grown in a culture, they initially adjust to new medium and then start dividing rapidly, consuming available food reservoir uninhibited. In sometime, the growth becomes limited, bacteria stop dividing and eventually die. Which of the following graphs best exhibits bacterial growth in the culture at an optimum temperature over a 24-hour period? A. B. C. D. 46. What is the distance Y between the road and the mirror in terms of X? A. Y = X B. Y = 12X C. Y = 5X D. Y = 2X 47. When we stand in front of a mirror, we can see only a part of the image depending on the length of the mirror because A. The image of the rest of the body is not formed by the mirror B. Those reflected rays do not reach our eyes C. Highly diminished image is formed D. Virtual and inverted image is formed 16th NSO - SET B 7 49. A student performed the first set of experiments with four test tubes containing solutions and metal pieces as indicated in the figure. In the second set of experiments, the metal pieces are interchanged between test tubes P and Q and also between test tubes R and S. In which test tube(s), no reaction will occur in both sets of experiments? A. P and Q B. R C. S D. R and S 50. Consider the following statements (a-e) each with one or two blanks. a. Lactobacillus promotes curdling of milk by creating an _____ (1)____ environment. b. c. d. e. Select the correct option to fill any four or five blanks. A. (1) acidic (2) antibodies (3) bacterial (4) female. B. (1) alkaline (4) female (5) male (6) kharif (7) rabi C. (1) acidic (6) kharif (7) rabi (8) winnowing D. (2) weak germs (4) female (5) female (6) kharif (7) rabi. SPACE FOR ROUGH WORK Vaccines employ the use of _____ (2)____. They give protection against _____(3) ____ diseases. The _____ (4) ____ Anopheles mosquitoes are carriers of malaria and dengue is spread by _____ (5) ____ Aedes mosquito. The crops that require more water for growth and are sown in the month of June are called _____ (6) ____ crops, while those that require less water for growth and are grown during the winter season are called _____ (7) ____ crops. Manual scattering of seeds in the field is called _____ (8)____. Class 8 17th Set A Year 2014 17th NSO - SET A 2 Logical reasoning 1. Select the option which will replace the question mark in the given number series. A. C. 400 420 10, 100, 200, 310, ? B. 410 D. 430 2. Mr. ‘X’ shows three photographs to Mr. 'Y'. Pointing towards photograph 1, he says, “The person in photograph 1 is my uncle, who says ‘uncle’ to the person in photograph 2, and the person in photograph 3 is called ‘uncle’ by the person in photograph 2.” How is Mr. ‘X’ related to the person in photograph 2? A. B. C. D. 3. At a dinner party, both fish and meat were served. Some took only fish while some took only meat. There were some vegetarians also who did not accept either of the two, while the rest accepted both fish and meat. Which of the following Venn diagrams correctly represents this situation? Grandson Granddaughter Great grandson None of these B. A. C. 4. Six people P, Q, R, S, T and U are sitting on the ground in a hexagonal shape. All the sides of the hexagon, so formed, are of same length. P is not adjacent to Q or R; S is not adjacent to R or T; Q and R are adjacent; U is in the middle of S and R. Who is at the same distance from S as T is from S? A. B. C. D. 5. Select the pair of figures which satisfies the same conditions of placement of dots. A. C. A. C. 7. If Fig. (X) is rotated one step in a particular direction, then identify its rotated form, from the given option figures. Z D B. D. N None of these A. B. C. D. 8. Select a figure from the given options which will complete the given figure matrix. A. B. C. D. 9. Three of the following four numbers are alike in a certain way and so form a group. Which of the following does not belong to that group? A. C. D. Q R U Can't be determined I, II III, IV If the alphabets are written in the reverse order after interchanging alphabets from ‘D to L’ with those from ‘R to Z’ respectively, which letter would be midway between W and E in the new order? Fig. (X) 6. B. D. II, III I, IV 143 759 B. D. 399 257 17th NSO - SET A 3 10. There are seven figures, the first and last of which are unmarked and remaining are marked as P, Q, R, S and T. However, the series will be established only if the positions of two of the marked figures are interchanged. Find the figures. A. C. PQ QT B. D. A. 14 B. 15 C. 16 D. 12 What will come in place of (b)? A. C. 21 19.5 B. D. 23.5 16 13. There are five different successive figures showing movement of the hands in a clock. Identify the pattern and find the next figure. QR ST 11. A pile of cubes of equal size is arranged in the form of a block as shown in the figure. If the block is dipped into a bucket filled with red paint, so that only the surfaces of the block get coloured, then how many cubes are coloured on three faces only? A. B. C. D. 14. In a code language, each of the vowels, i.e., A, E, I, O and U, is substituted by the letter preceding it, while a consonant is substituted by the nearest vowel. How can the word EVIDENCE be written in that code? 12. Two series in two rows are given below. In the first row, a full series is given which follows a specific pattern. The second row has a series, similar to the first series but only first element of this series is given, followed by (a), (b), (c), (d) and (e), representing the subsequent elements. Complete the series and answer the question that follows : 7 24 10 33 14.5 46.5 11 (a) (b) (c) (d) (e) A. B. C. D. DUHJEDOED DUHEDUAD DUJEDOAD DUHEDOAD OR DUHEDOED 15. At my farmhouse I am facing East, then I turn left and walk 10 metres. I again turn right and walk 5 metres. Again I go 5 metres towards the South, and from there walk 5 metres towards the West. In which direction am I from my farmhouse ? A. C. East North B. D. West South Science 16. When a constant force acts on a mass, and the mass starts moving from rest, then the (i) acceleration is constant (ii) velocity increases at a constant rate (iii) distance travelled is directly proportional to the time. Which of the above statements is/are correct? A. (i) only B. (i) and (ii) only C. (i) and (iii) only D. (ii) and (iii) only 17. Which planet is called the morning star as well as the evening star, depending on its position with respect to the sun? A. Mercury B. Venus C. Mars D. Saturn s 18. The displacement-time graph of a body in motion is shown here. The corresponding velocity-time graph will be v A. v t t B. v v D. C. t t t 17th NSO - SET A 4 19. A man standing in front of a large wall, claps two objects against each other at an interval of 1.2 s regularly. The echo of the first clap coincides with the fifth clap. If the speed of sound in air is 340 m s–1, the distance between the man and the wall is ____. A. C. 408 m 816 m B. D. 1632 m 204 m 20. The image formed by the side-view mirror of an automobile is (i) of the same size as that of object (ii) virtual and diminished (iii) erect and real (iv) erect and magnified. Which of the following statements is/are correct? A. (i) only B. (ii) only C. (i) and (iii) only D. (iii) and (iv) only 21. The diagram shows a man standing at a position M in front of a plane mirror, a distance of x m from the mirror. When the man moves 3 m away from the mirror, the new distance between the man and his image becomes 12 m. What is the value of x? A. 1 m B. 2 m C. 3 m D. 4 m 22. A substance in gaseous form is being cooled to solid state. Its temperature will remain constant when the substance is (i) in condensing phase (ii) in freezing phase (iii) at thermal equilibrium with the environment. A. (i) only B. (iii) only C. (i) and (ii) only D. (i), (ii) and (iii) 23. During a track and field meet, the time difference between seeing the smoke from a starter's gun and hearing the bang would be less ______. A. B. C. D. On a warmer day On a cooler day If a more powerful shell were used If a less powerful shell were used 24. Read the given statements and mark the correct option. Statement -1 : A convex mirror always forms a real image. Statement -2 : A diverging beam incident on a convex mirror is reflected as a diverging beam. A. B. C. D. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. Statement 1 is false but statement 2 is true. Both statements 1 and 2 are false. 25. A cube of side 0.2 m rests on the floor, as shown. Given that the cube has a mass of 50 kg, the pressure exerted by the cube on the floor is ________. (Take g = 10 N kg–1) A. 25 N m–2 C. 1250 N m–2 B. D. 50 kg 0.2 m 250 N m–2 12500 N m–2 26. In an electrical circuit containing a battery, the positive charge inside the battery ________. A. B. C. D. always goes from positive terminal to the negative terminal may go from positive terminal to negative terminal always goes from the negative terminal to positive terminal does not move 27. A plank is supported on the steps of a staircase as shown in the figure. How many forces are acting on the plank? A. B. C. D. 4 5 6 7 Plank 28. How do cyclones decrease the fertility of soil in the coastal areas? A. B. C. D. By By By By flooding the land with saline water. dissolving soil and rocks. increasing the water table of the place. decreasing the water table of the place. 29. Read the given statements and select the correct option. Statement-1 : Petroleum is called ‘black gold’. Statement-2 : Petroleum is a dark oily liquid. A. Both statements 1 and 2 are true but statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true but statement 2 is false. D. Both statements 1 and 2 are false. 17th NSO - SET A 5 30. Read the table carefully. S. Reaction No. 1. Copper vessel exposed to moist air. 2. Aluminium foil dipped in fresh solution of sodium hydroxide. 3. Rusting of iron. 33. Identify V, W, X, Y and Z in the given Venn diagram. Product formed Green coating Characteristic test Turns red litmus solution blue. Colourless, Burns with a odourless pop sound. gas Reddish brown deposit 4. Burning of sulphur Colourless, powder. suffocating gas Identify the products formed and A. (1) Cu(OH)2 , CuCO3; basic (3) Fe2O3; basic B. (1) CuO; basic (3) Fe3O4; basic C. (1) Cu(OH)2 , CuCO3; basic (3) Fe2O3; acidic D. (1) Cu; basic (3) FeO, basic Turns red litmus solution blue. Turns blue litmus solution red. their (2) (4) (2) (4) (2) (4) (2) (4) nature. H2; neutral SO2; acidic O2; neutral H2S; acidic H2; neutral SO2; basic H2O; neutral SO3; basic 31. Which of the following examples are periodic changes? I. Occurrence of eclipse. II. The flowering of jasmine bush. III. Occurrence of new moon. IV. Opening and closing of stomata. V. Appearance of rainbow. VI. Rotation of earth. VII. Blinking of eyes. VIII. Twinkling of stars. A. I, V, VII and VIII B. I, II, III and IV C. II, III, IV and VI D. All are non-periodic changes. 32. Neha, a class VIII student arranged the following experimental set-up and observed the changes carefully. On the basis of her observations identify the correct order of reactivity. A. Zn > Cu > Fe B. Zn > Fe > Cu C. Fe > Zn > Cu D. Cu > Fe > Zn V A. Filling W Withdrawing money from ATM Charging mobile battery Charging mobile battery Filling a water bottle a water bottle B. Filling a water bottle C. Burning a candle D. Boiling an egg X Y Burning a candle Charging mobile battery Withdrawing money from ATM Boiling an egg Burning a candle Filling a water bottle Withdrawing Charging money from mobile ATM battery Z Boiling an egg Boiling an egg Withdrawing money from ATM Burning a candle 34. Different mixtures are taken in four different test tubes and each of them is tested with indicators as shown below : Methyl orange Turmeric solution 5 mL Sour milk + 5 mL Water Pinch of baking powder + 5 mL Lime water (1) (2) (3) Phenolphthalein China rose Pinch of salt + 5 mL Sugar 5 mL Lemon juice + 5 mL Tamarind juice (4) Select the incorrect observation. A. No change in colour in test tubes 1 and 3. B. Turmeric solution turns red in test tube 2. C. China rose turns magenta in test tube 4. D. None of the above 35. Match the articles given in Column-I with the fibres/plastics from which they are made in Column-II. (a) (b) (c) (d) (e) A. B. C. D. Column-I Column-II Toothbrush bristles (i) Melamine Carpet (ii) PVC Bottle (iii) Nylon Toy (iv) Rayon Fire resistant fabric (v) PET (a)-(i), (b)-(iv), (c)-(ii), (d)-(v), (e)-(iii) (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i), (e)-(v) (a)-(iii), (b)-(iv), (c)-(v), (d)-(ii), (e)-(i) (a)-(iii), (b)-(v), (c)-(iv), (d)-(i), (e)-(ii) 17th NSO - SET A 36. The manufacture of bread, beer and wine involves alcoholic fermentation of glucose to ethanol by yeast. Which of the following five statements concerning this process are correct? I. Yeast carries out fermentation because yeast cells lack mitochondria. II. For every molecule of ethanol produced, one molecule of CO2 evolves. III. For every one molecule of glucose fermented, net two molecules of ATP are generated. IV. More than 80% of the chemical energy of the glucose is released as heat. V. Glycolysis is an integral part of this fermentation. A. II, III and IV B. I, II, III and V C. II, III and V D. I, IV and V 37. Thyroxine controls _______ in frogs and the development of _______ and ______ during embryonic development of other vertebrates. Thyroxine production requires the presence of ______ in diet. Select the correct sequence of words to complete the above passage. A. Development, Circulatory system, Muscles, Iodine B. Metamorphosis, Circulatory system, Muscles, Calcium C. Development, Bones, Nervous system, Iron D. Metamorphosis, Bones, Nervous system, Iodine 6 40. The names of some plants are given below in the list : I. Lady’s finger VI. Grass II. Drumstick VII. Xanthium III. Balsam VIII. Madar IV. Urena IX. Sunflower V. Maple X. Coconut Match these plants with the mode of dispersal of their fruits/seeds and select the correct option.  A. B. C. D. Wind Animals II, V, VI, VIII, IX III, IV, VII X I II, V, VI, VIII, IX IV, VII X I, III V, VI, IX II, IV, VII X I, III, VIII II, VI, VII, VIII I, IX X III, IV, V Some steps involved in the treatment of water in a wastewater treatment plant are labelled as P, Q, R and S in the above diagram. The table given below shows () for those steps in which the particular process is occurring while () for those in which it is not occurring. Which among these is/are incorrect? Process I. P Q R S Sludge removal     II. Anaerobic decomposition A. B. C. D. X is unable to hold water or nutrients. Y is used for pot making. Z provides good aeration to plant roots. X is best suited for cultivation. 39. Read the given statements and select the correct option. Statement-1 : Chloroplast and mitochondria are semi-autonomous organelles. Statement-2 : Chloroplast and mitochondria have their own DNA and protein synthesizing machinery. A. B. C. D. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement  1. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. Statement 1 is true and statement 2 is false. Both statements 1 and 2 are false. Bursting of fruits 41. 38. The given pie charts show the composition of three types of soil samples X, Y and Z. Which of the following is correct regarding these soil samples? Water     III. Cleaning of clarified watery waste     IV. Disinfection of treated water A. C. I and II II only B. D.     III and IV None of these 42. According to the extent of threat to a species and its population in its natural habitat, four categories have been identified which are given below : I. Extinct in wild II. Critically endangered species III. Vulnerable species IV. Endangered species Select the correct order of these species according to their conservation priority? A. II > IV > I > III B. I > II > IV > III C. III > I > II > IV D. I > IV > III > II 17th NSO - SET A 7 43. Refer to the given figures of bacteria (X, Y and Z) and read the statements I, II & III regarding these. Based on the given information, identify the bacterium and select the correct option. I. II. Bacteria X causes cholera. Bacteria Y causes a disease which disrupts proper exchange of gases. III. Bacteria Z converts lactose sugar of milk to lactic acid. A. X is Vibro cholerae. B. Z is Lactobacillus. C. Y is Salmonella typhi. D. Both A and C 44. Following investigation was carried out using flower buds growing on three plants of the same species. Plant X → The anthers were carefully removed, and the buds left open to the air. Plant Y → The anthers were left untouched, and a paper bag was tied tightly around each bud. Plant Z → The anthers were carefully removed, and a paper bag was tied tightly around each bud. Although all flowers later bloomed normally, only those on plant X, produced seeds. This result showed that in this species _____ pollination can take place. A. C. Only insect Only wind B. D. Only cross Either of A, B or C 45. Match Column I with Column II and select the correct option from the codes given below. Column I Column II (a) SPM (i) Poisoning of bald eagles (b) Typhoid (ii) Green house gas (c) CO (iii) Vehicle exhaust (d) CO2 (iv) Incomplete combustion (e) DDT (v) Pathogens in polluted water a b c d e A. iii v ii iv i B. i iii iv ii v C. iii iv v ii i D. iii v iv ii i Achievers Section 46. The given graph shows two crop fields (X and Y ) that have been treated by different types of materials for nutrient replenishment, keeping other environmental factors same. Given are some assumptions regarding the crop fields and the materials used. Select the most correct one(s). I. Addition of chemical fertilizers in Y has resulted in sudden increase in yield due to increased release of N, P, K nutrients, but it gradually declined as continuous use of chemicals killed useful microbes that replenish the soil fertility. II. The difference in the two graphs indicates that the crop fields X and Y are treated with fertilizer and manure respectively, as fertilizer is beneficial for long time and gives durable yield whereas manure gives immediate yield but later causes problems. III. The highest peak in crop field X is slightly delayed because manure enriches soil fertility gradually. A. C. I and II III only B. D. II only I and III 47. A large number of functions are performed by different hormones secreted by endocrine glands. Match the given functions (a, b, c, d and e) to the labelled glands in the figure and select the correct option. a. b. c. d. e. A. B. C. D. Maintains a steady level of glucose in the blood. Helps in the growth of human body and also sends signals to other organs to secrete hormones. Controls secondary sexual characters and maintains pregnancy. Controls rate at which food is oxidised by the cells to produce energy. Increases blood pressure and heart rate, when the body experiences stress. a b c d e R P Q T S P R Q S T S P Q R T R P Q S T 17th NSO - SET A 8 Direction (Q.No. 48 and 49): Refer to the given passage and answer the following questions: 50. Sakshi performed two experiments as shown in figure 1 and 2, and recorded her observations in the table. Ram jogs from one end X to the other end Y of a straight 300 m road in 2 minutes 30 seconds, and then turns around and jogs 100 m back to point Z in another 1 minute. X 300 m Z Y 100 m Observation 48. What is Ram’s average speed and average velocity while jogging from X to Y respectively? A. 1.0 m s–1 , 1.0 m s–1 B. 3.0 m s–1, 2.0 m s–1 C. 2.0 m s–1, 2.0 m s–1 D. 4.0 m s–1, 1.0 m s–1 49. What is Ram’s average speed and average velocity while jogging from X to Z respectively ? A. 2.0 m s–1, 1.9 m s–1 B. 5.1 m s–1, 9.1 m s–1 C. 1.0 m s–1, 1.0 m s–1 D. 1.9 m s–1, 0.9 m s–1 Does paper pan burn? Is ignition temperature of paper reached? Figure 1 Figure 2 Figure 1 Figure 2 I Yes Yes No Yes II Yes No Yes No III No Yes Yes Yes Find out the correct observation and the reason behind it from the options given below. A. I, paper has a higher ignition temperature than water. B. II, fireproof paper pan is used in figure 2. C. III, paper is non-inflammable. D. II, heat supplied to the paper pan is transferred to water by conduction, so ignition temperature of paper is not reached in figure 2. SPACE FOR ROUGH WORK Class 8 17th Set B Year 2014 17th NSO - SET B 2 Logical reasoning 1. Select a figure from the options in which Fig. (X) is exactly embedded as one of its part. A. B. D. C. 2. Three positions of a dice are shown below. What is the number opposite to the number 1 ? 6 3 1 4 5 5 4 6 5. If in a code REQUEST is written as S2R52TU, then how will ACID be written in that code? A. B. C. D. 6. 8 is related to 81 in the same way as 64 is related to ________. A. B. C. D. A. 2 B. 3 C. 5 D. 6 3. Vijay walks 10 kilometres towards North. From there, he walks 6 kilometres towards South. Then, he walks 3 kilometres towards East. How far and in which direction is he now with reference to his starting point? Select a figure from the options which will continue the given series. 11 1 11 1 1 ? 3 8 4 8 6 6 A. 5 kilometres West B. 5 kilometres North-East C. 7 kilometres East D. 7 kilometres West 4. Find the mirror image of the Fig. (X), if the mirror is placed vertically to the left. A. C. B. 6 8. Study the series carefully and answer the question that follows. ∂ = b F 2 * K S 7 5 # $ PLV 8 @ M 6 ↑ Q G © 9 3 &TY£ What will come in place of question mark? 4 7 4 C. D. If '= → 2', 'K → #' and 'P → M', then '↑ → ?'. A. B. C. D. 9. In first row, a series is given which follows a specific pattern. The second row has a series, similar to the first series but only first element of this series is given. Identify the pattern and answer the question that follows. B. D. 5 Fig. (X) A. 6 125 137 525 625 7. 4 BDJE 1394 B3J4 1D3E 3 T 9 & 6 2 18 a 36 b 108 c What will come in place of e ? 216 648 d e 17th NSO - SET B A. B. C. D. 3 482 344 216 420 13. Select a pair of figures which satisfies the same conditions of placement of dots. 10. In the given Venn diagram, find the region representing persons who are educated and employed but not confirmed in job. Employed Educated b a A. B. C. D. d e c Confirmed in job A. B. C. D. A. B. C. D. R S PR QS PS QT d e b a, b Fig. (X) A. C. B. D. 15. A sheet of paper is folded in a particular manner and a punch is made. Select a figure from the options which will closely resemble the unfolded form of given sheet. ? 12. A is the brother of B. C is married to D. If C is the nephew of B, how is A related to D? A. B. C. D. A. B. C. D. T 14. Which of the following options will exactly make up the key Fig. (X) ? 11. Which of the following figures will complete the figure matrix ? Q P Father-in-law Mother-in-law Son-in-law Daughter-in-law Science 16. The pressure of the water near the bottom of the wall forming a dam does not depend on ______. A. B. C. D. The depth of the water The cross-sectional area of the reservoir Density of water Atmospheric pressure 17. When the tension in the string of a guitar is increased, but other factors remain unchanged, the sound produced ________. A. B. C. D. Is louder Has higher pitch Has longer wavelength Travels faster 17th NSO - SET B 4 18. A windmill is pushed by four external forces as shown in the given figure. The force F required to make the windmill stand still is A. B. C. D. 10 13 15 18 A. B. C. D. N N N N 19. The given diagram shows water being heated in a tin can. A thermometer hangs directly above it. In which way, does the thermal energy from the heat source reach the thermometer? 22. When electrodes are immersed in water and electricity is passed, then the bubbles formed on the negative terminal is Thermometer Tin can Water Radiation → Conduction → Radiation Radiation → Conduction → Convection Radiation + Convection → Conduction → Radiation Radiation + Convection → Conduction → Radiation + Convection B. 3 m s–1 C. –1 4ms D. 6 m s–1 X Y 2 m s–1 21. A positively charged oil drop is suspended in the air by two charged plates as shown in the given figure. What will happen to the oil drop if the positive charge in it decreases? –––––––––– + ++++++++++ A. B. C. D. The The The The oil oil oil oil drop drop drop drop will will will will Oxygen Hydrogen Carbon dioxide Nitrogen 23. Arrange the following planets in increasing order of time required to complete one rotation around Sun. F 20. A person X is facing a plane mirror which is fixed. While another person Y is running towards person X from behind at a speed of 2 m s–1 as shown in the given figure. How fast does person Y seem to be running towards person X in the mirror ? Mirror A. 2 m s–1 A. B. C. D. move randomly. move upwards. move downwards. remain stationary. (i) (iii) A. B. C. D. Earth Mars (i), (ii), (iii), (iv) (i), (iii), (iv), (ii) (iv), (iii), (ii), (i) (ii), (iii), (i), (iv) (ii) Uranus (iv) Jupiter 24. Two persons P and Q are standing at a distance of 100 m from a high wall as shown in the given figure. When P gives a clap, the time interval between the two (direct and reflected) sounds heard by Q is 0.2 s. If the speed of sound is 340 m s–1, then the distance d between P and Q is A. 160 m B. 260 m C. 290 m D. 320 m Wall 100 m d P Q 25. The speed-time graphs for three vehicles X, Y and Z are shown. Speed (m s–1) If x, y and z are the distances travelled by 10 X X, Y and Z respectively Z 5 in 8 s, then which of the Y following comparisons 0 Time (s) 8 is correct ? A. B. C. D. x x x x > > = < y y y y = > < < z z z z 26. Which of the following objects experience balanced forces? A. B. C. D. A ball dropping vertically. A car accelerating uniformly from rest. A trolley moving at a constant velocity down an inclined plane. A plane flying in a circle with constant speed. 17th NSO - SET B 5 27. Spoons of different materials are used to stir a hot drink. Which of the following spoons will heat up the fastest? A. B. C. D. Plastic spoon Steel spoon Glass spoon Wooden spoon 28. When we remove polyester or woolen cloth in dark, we can see spark and hear a cracking sound. These are due to ________. A. B. C. D. Static electricity Current electricity Movement of charges None of these 29. Observe the given experimental set-up and identify the gas ‘X’ and its characteristics. 31. Read the given statements carefully. P : I am the most common fire extinguisher but not suitable for oil, petrol and electrical fires. I am heavier than oil and also, conduct electricity. Q : I am an excellent fire extinguisher and most suitable for oil, petrol and electrical fires. I also, form a blanket around the fire and bring down the temperature of the fuel. Identify P and Q. P Q H2 O A. CO2 B. H2O CO C. O2 CO2 D. H2O CO2 32. Renuka, a science teacher performed the following activity to prove that air is necessary for combustion. I I. II. III. IV. A. B. C. D. It is carbon dioxide. It is sulphur dioxide. It does not support combustion. It is acidic in nature. II and IV I, III and IV I and III II, III and IV 30. Namita categorised the different elements as shown below : Characteristic Na Al S Fe Cu P a. Metal ü ü  ü ü  b. Hardness ü   ü ü  c. Malleability  ü   ü ü d. Ductility   ü ü ü  e. Conductor of electricity ü ü  ü ü  Which of the characteristics is not correctly matched by Namita? A. a, c and e B. a, b, d and e C. b, c and d D. All are correct II III She asked the students to observe the flame of lighted candles placed under the glass chimneys carefully. What were the correct observations. I II III A. Flame finally Flame flickered Candle burnt went off and produced freely smoke B. Candle burnt Flame finally Flame flickered freely went off and produced smoke C. Candle burnt Flame flickered Flame finally freely and produced went off smoke D. Flame finally Candle burnt Flame flickered went off freely and produced smoke 33. Fill in the blanks. Raghav used excessive chemical fertilisers during farming which makes the soil (i) . He added (ii) to increase the production of crops. Rahul used excessive substances to neutralise the factory wastes near his field. As a result, the soil of his field became too (iii) which he treated with (iv) . (i) (ii) (iii) (iv) A. Acidic Organic matter Basic Slaked lime B. Basic Organic matter Acidic Slaked lime C. Acidic Slaked lime Basic Organic matter D. Basic Slaked lime Acidic Organic matter 17th NSO - SET B 6 Turns China rose indicator green Y Bitter in taste Found in spinach Z Phenolphthalein remains colourless A. B. C. D. Y Z Oxalic acid Milk of magnesia Soap Tartaric acid Window cleaner Ascorbic acid Milk of magnesia Oxalic acid 35. Match the Column-I with Column-II and select the correct option given below. a. b. c. d. e. f. A. B. C. D. Column-I Column-II Coal tar (i) Metalling the roads Petrol (ii) Manufacture of steel Coal gas (iii) Source of heat Bitumen (iv) Vaseline Coke (v) Naphthalene balls Paraffin wax (vi) Dry cleaning a-(v), b-(vi), c-(iii), d-(i), e-(ii), f-(iv) a-(i), b-(iv), c-(iii), d-(ii), e-(v), f-(vi) a-(iii), b-(v), c-(i), d-(iv), e-(ii), f-(vi) a-(iv), b-(i), c-(vi), d-(iii), e-(v), f-(ii) 38. Body temperature of some animals changes with that of atmosphere while some animals have adapted to maintain constant body temperatures. A d v i k a investigated Z this fact using three X animals X, Y and Y Z and obtained the given graph. Which of these options correctly identifies X, Y and Night Day Temperature Z? X Y Z A. Frog Lizard Rabbit B. Lizard Cobra Rabbit C. Salamander Crow Cow D. Crow Bear Frog Body temperature 34. Identify Y and Z in the given Venn diagram. 39. Run-off pollution of a particular river resulted from overuse of chemical fertilizers by a nearby farm. Which of the following graphs correctly shows the resulting changes in levels of oxygen and bacteria in this river? A. B. C. D. 36. Which of the following statements about the characteristics of organelles are correct? (i) Mitochondria contain their own DNA. (ii) Lysosomes contain many anabolic enzymes. (iii) Secretory liver cells have abundant number of RER. (iv) Ribosomes are always found attached to the Golgi apparatus. A. (i) and (iii) B. (i) and (ii) C. (i), (ii), (iii) and (iv) D. (i), (ii) and (iv) 37. Digestion of food involves breaking down of food components into smaller molecules by enzymes. These enzymes are active only at certain hydrogen ion concentrations. As a result, certain food combinations can facilitate or retard the process of digestion. Of the following combinations, one that can result in very efficient digestion is ______. A. B. C. D. Meal Meal Meal Meal with with with with high high high high proteins and acid fruits starch and high proteins starch and acid fruits fat and high proteins 40. The given figure represents the location of various endocrine glands in human body. Identify the glands marked as P, Q, R, S and T and select the incorrect statement regarding these. A. B. C. D. P R Q S T Gland P secretes the hormone thyroxine, which regulates growth and metabolism. Gland Q secretes the hormones corticosteroids and adrenaline, which regulate breathing, heart rate, carbohydrate metabolism and mineral balance. Glands S and T secrete the hormones which control secondary sexual characters in females and males respectively. Gland R secretes the hormone insulin, whose increased concentration leads to diabetes. 17th NSO - SET B 7 41. Read the given statements and select the correct option. Statement 1 : H otspots are specific regions of megabiodiversity nations with large number of endemic species. Statement 2 : Endemic species are often threatened due to the introduction of exotic species from some other geographical area. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true and statement 2 is false. D. Statement 2 is true and statement 1 is false. 44. Tarun sets up a plant as shown in the figure. After a few days, he observed upward growth in the roots of the plant. Soil X Soil X After few days Soil Y Soil Y Day 7 Day 1 Based on his observations what can you conclude? A. Soil X is clayey while soil Y is loamy. B. Soil X is sandy while soil Y is clayey. C. Soil X is loamy while soil Y is sandy. 42. Select the incorrect statement from the following. D. It is not possible to tell. A. Synthetic fibres have little or no absorbency, although several of them do absorb oil. B. Wool fibre is harmed by acids including mild acids like vinegar. C. Cellulose fibres continue to glow after they are removed from the flame. D. Cotton fibres, linen and other cellulose fibres are quiet heat resistant and can be boiled safely. 45. Read the given passage in which some words are italicised. Agriculture has become more efficient with the advent of modern technology. Modern tractor driven ploughs are faster and better. Seed drills used today combine 5-6 traditional seed drills. Thus, they are faster and ensure sowing seeds at proper depth of 20-25 cm. Modern irrigation methods have also been developed which reduce water wastage. Drip irrigation is less expensive method particularly useful for soils with low water retention capacity. Sprinklers are more suited for uneven lands and sandy soils. 43. Refer to the given diagram which shows a cross section of the stem and select the correct option. Part X Part Y Some of these italicised words are put incorrectly. Find out them and select the correct option. On girdling, swelling occurs above the girdled part due to the discontinuity of part Y. A. Less expensive should not be replaced as it is correctly mentioned. C. Conduction of water and organic solutes occurs through part Y. B. 20-25 cm should be replaced by 10-15 cm. C. Low should be replaced by high. D. Conduction of products of photosynthesis occurs through part X. D. Uneven lands should be replaced by plain lands. A. If we put a plant in red water for sometime, the colour would then appear in the part X. B. Achievers Section Direction : (Q. No. 46 and 47) Refer the given passage and answer the following questions. 46. The range of the scale of the metre ruler that can be seen is A metre ruler is held vertically in front of a plane mirror of length 15 cm as shown in the given figure. A student peeps through a hole at the 40 cm mark. 0 10 cm 5 cm 100 cm A. C. 10 cm to 40 cm 20 cm to 50 cm B. D. 15 cm to 45 cm None of these 47. If the hole is at 80 cm mark of the scale, then the range of the metre ruler that can be seen in the mirror is A. C. 10 cm to 40 cm 30 cm to 60 cm B. D. 20 cm to 50 cm None of these 17th NSO - SET B 8 48. Anuj has performed an experiment to compare the strength of different fibres. He arranged the set-up as shown in figure : Arrange the threads in order of their increasing strength. A. Nylon < Silk < Cotton B. Silk < Cotton < Nylon C. Cotton < Nylon < Silk D. Cotton < Silk < Nylon Hook Threads of same length and thickness were taken 1. (i) Somatic cells carry out propagation - Go to 2. Weights were put one by one till the thread broke - P No. of yeast cells No. of yeast cells A. B. C. (ii) Multiple cell divisions occur - Go to 4. 3. (i) Fertilization occurs outside parent's body Y (ii) Germ cells carry out propagation - Go to 3. 2. (i) Single cell division forms new organism Y X The environmental factor studied in the graph P can be sugar concentration in medium and in graph Q can be pH. 50. Refer the given key to identify the organisms P, Q, R, S, T and U and select the correct option. 49. Swati was studying growth of yeast under different conditions of environment. She plotted two graphs but forgot to label the X axes of the graphs. Analyse the given graphs and select the correct option. P D. - Q (ii) Fertilization occurs inside parent's body - Go to 5. 4. (i) Each cell produced after division produces new organism - R (ii) All the cells together form a new organism - S Q 5. (i) Embryonic development occurs outside parent's body - T X The environmental factor studied in graph P can be pH and in graph Q can be temperature. The environmental factor studied in graph P can be temperature and in graph Q can be sugar concentration in medium. The environmental factor studied in graph P can be temperature and in graph Q can be pH. (ii) Embryonic development occurs inside parent's body - U A. B. C. D. P can be yeast, Q can be chamaeleon. R can be Plasmodium, S can be Hydra. T can be duck-billed platypus, U can be ostrich. P can be yeast, U can be spiny ant eater. SPACE FOR ROUGH WORK Class 8 18th Set 1 Year 2015 logical reasoning How many such symbols are there in the given arrangement each of which is immediately preceded by a number and immediately followed by a letter? 58#BFL?4*M79GH2M3+84?$PQ 6R7*HT A. C. 2. Three different positions of a dice are shown here. Which symbol will be on the face opposite to the face with symbol * ? 2 4 B. D. 3 5 A. B. C. D. 3. Read the following information carefully. (i) (ii) A $ B means B is at 1 metre to the North of A. (iii) A * B means B is at 1 metre to the left of A. If M is facing towards North, according to M # N $ O * P, in which direction is P with respect to M? A. C. 4. Which of the following Venn diagrams best depicts the relationship amongst "Teachers, Men, Players"? 7. Select the correct water image of the given Fig. (X). × * * © Fig. (X) + East North B. D. D. 5. In which of the following options, Fig. (X) is exactly embedded as one of its part? C. 2 B. D. B. D. × J A 8. There is a certain relationship between figures (i) and (ii). Establish the similar relationship between figures (iii) and (iv) by selecting a suitable figure from the options which will replace the (?) in figure (iv). × U S T S P P (i) S S (ii) 9. Select a figure from the options which will continue the same series as established by the Problem Figures. Problem Figures A. C. + + = = D. S C. + (iv) = B. (iii) A. S ? Fig. (X) A. C. B. C. A West South × A A # B means B is at 1 metre to the right of A. A. A. A J – + J A Δ Δ © + J  Find the missing number, if a certain rule is followed row-wise or column-wise in the given matrix. 3 ? 5 A. 4 5 4 7 B. 6 4 4 6 C. 9 36 32 114 D. 8 + 6. J 1. + = + = G S = + + = ? + B. = D. = + | 18th NSO | Class-8 | Set-1 | Level 1 10. If P + Q means 'P is the brother of Q', P × Q means 'P is the wife of Q' and P ÷ Q means 'P is the daughter of Q', then which of the following means 'A is the niece of D'? A. B. C. D. A÷B×C+D A×B+C÷D A+C÷B×D A÷C+B÷D Science 11. The speed of sound in different media is different. Which of the following options is correct regarding the speed of sound in different media? A. B. C. D. Oxygen < Mud < Water Ice < Stone < Alcohol Fruit juice < Iron < Air Steam < Kerosene < Mercury P Q R S A. Big dipper Little dipper Pole star Cassiopeia B. Little dipper Big dipper Cassiopeia Pole star C. 12. A cube of side a rests on the floor as shown in the given figure. Given that the pressure exerted by this cube on the floor is P, what is the pressure exerted by another cube of the same material of side 4a ? –1 (Take g = 10 N kg ) A. P B. 2P C. 4P a 4a D. 16P Cassiopeia Pole star Big dipper D. Little dipper Big dipper Pole star A. B. C. D. Radiation → Convection → Conduction Conduction → Conduction → Convection Radiation → Conduction → Convection Radiation → Conduction → Radiation 14. United Football Club is playing an evening match. The team’s jersey has blue and white stripes. What colour would the stripes appear under floodlights which produce a yellow light? A. C. Black and yellow Blue and yellow B. D. Coil Nail When the switch is turned on, iron nails are attracted. Which of the following ways will make the soft iron core to attract all the iron nails? A. Decrease the number of cells B. Increase the number of turns in coil C. Place the soft iron core outside the coil D. None of these 17. A car is accelerating on a road in the direction shown in the figure. The tyre shown is connected to the engine. In which direction is the force of friction exerted by the road on the tyre? Blue and white Black and white Direction of motion 15. The given diagram shows the night sky in which stars are visible. Identify P, Q, R and S. Q 18th NSO | Class-8 | Set-1 | Level 1 | S P A. B. C. D. P Q R S Tyre Q S P R Cassiopeia 16. The diagram shows a soft iron core coiled with wire. Soft iron core S 13. The given diagram shows a brick wall in between a man and a camp fire. How does thermal energy from the camp fire reach the man?  Small dipper Road R 3 18. Read the given statements and select the correct option. Statement 1 : The size of a hydrogen balloon increases as it rises in air. Statement 2 : The material from which the balloon is made can be easily stretched. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true and statement 2 is false. D. Both statements 1 and 2 are false. 19. Anju walks 8 m to the east, then 6 m to the south, then 8 m to the west and finally 6 m to the north. What is the distance covered and displacement of Anju? A. B. C. D. Distance travelled 0 m 0 m 28 m 28 m Displacement 0m 28 m 0m 28 m 20. Deepak put twenty ice cubes of the same volume into four containers packed with different materials. He recorded the time taken for the ice to melt in each case. The table shows his results. Which of the boxes should he choose to carry ice that he needs to take to a friend’s house 120 km away? A. B. C. D. Container with thermocol Container with ice paper Container with sand Container with sawdust Melting time : 3 h 10 min Melting time : 2 h 05 min Melting time : 30 min Melting time : 1 h 15 min 21. A positively charged object attracts a suspended light conducting ball. The light conducting ball can be (i) (ii) (iii) A. C. negatively charged positively charged neutral (i) only (ii) and (iii) only B. D. (ii) only (i) and (iii) only 22. The terminals of a battery are joined by a length of resistance wire. Which change, on its own will decrease the current through the battery? A. 4 Connecting an identical wire in series with the first one. B. C. D. Covering the wire with plastic insulation. Using a shorter wire of the same material and same thickness. Using a thicker wire of the same material and same length. 23. Metals are good conductors because A. B. C. D. Outer electrons are strongly bound to the atom Outer electrons are loosely bound to the atom Inner electrons are loosely bound to the atom Protons can detach from the nucleus and conduct electricity. 24. Figure gives the speed-time graph of the motion of a car. What is the ratio of the distance travelled by the car during the last two seconds to the total distance travelled in seven seconds? A. 1:9 B. 2 : 9 C. 1:3 D. 4:9 25. Match the column I with column II and select the correct option from the given codes. (a) (b) (c) (d) (e) A. B. C. D. Column I Column II Jupiter (i) Seven rings Saturn (ii) Red planet Mars (iii) Morning star Neptune (iv) Great red spot Venus (v) Fourteen moons (a) – (iv), (b) – (i), (c) – (v), (d) – (iii), (e) – (ii) (a) – (i), (b) – (ii), (c) – (iii), (d) – (iv), (e) – (v) (a) – (v), (b) – (iv), (c) – (iii), (d) – (ii), (e) – (i) (a) – (iv), (b) – (i), (c) – (ii), (d) – (v), (e) – (iii) 26. Each beaker shown in the given options, contains two same sized strips of different metals fastened together and immersed in hydrochloric acid. After 5 minutes, which beaker will contain the least amount of zinc ions? A. B. Magnesium Zinc C. Iron Zinc Lead Zinc D. Silver Zinc | 18th NSO | Class-8 | Set-1 | Level 1 27. Three unknown solutions are taken in test tubes. Different indicators are added to these solutions to test their nature. Phenolphthalein Methyl orange China rose indicator Solution ‘X’ Solution ‘Y’ Solution ‘Z’ (1) (Turns pink) (3) (No colour change) (2) (Turns red) Identify the substances X, Y and Z. X Y A. Soap solution Lime water B. Milk of Lemon juice magnesia C. Salt solution Tamarind juice D. Antacid Sour milk Z Grape juice Slaked lime Calamine solution Glucose solution 28. Read the given statements about synthetic fibres and plastics carefully. I. Polycot is a mixture of two types of fibres, polyester and cotton. II. Calendar, woollen clothes and cold drink cans are all non-biodegradable. III. Uniforms of firemen have coating of nylon to make them flame resistant. IV. Polythene and PVC are the examples of thermosetting plastics. Which of these statements is/are incorrect? A. II and IV B. I and III C. Only II D. II, III and IV 29. Match the column I with column II and select the correct option from the given codes. Column I Column II P. Dark zone of flame (i) Rapid combustion Q. Source of heat and (ii) Incomplete light in sun combustion R. Burning of LPG gas (iii) Spontaneous combustion S. Luminous zone (iv) Nuclear reactions T. Burning of (v) No combustion phosphorus in air at room temperature P Q R S T A. (v) (iv) (i) (ii) (iii) B. (ii) (iv) (i) (v) (iii) C. (v) (iv) (iii) (ii) (i) D. (ii) (iii) (iv) (v) (i) 30. Solution of which of the following oxides in water will change the colour of red litmus to blue? A. C. Carbon dioxide B. Phosphorus trioxide D. 18th NSO | Class-8 | Set-1 | Level 1 | Copper oxide Sulphur dioxide 31. Plants do not grow well when the soil is either too acidic or too basic. What should be added to the soil if it is too acidic? A. C. Lemon juice Quick lime B. D. Vinegar Organic matter 32. Fill in the blanks by choosing an appropriate option. I are used in the manufacture of detergents, fibres, polythene and other man-made plastics. II obtained from natural gas, is used in the production of fertilisers (urea). Petroleum is also called ____ III__ due to its great commercial importance. I II III A. Fossil fuels Petroleum gas Black gold B. Petrochemicals Coal gas Diesel C. Petrochemicals Hydrogen gas Black gold D. Coal products CNG Paraffin wax 33. Mrs. Usha, a science teacher performed the following experiments : Experiment 1 : She heated sugar in a China dish. A black substance was obtained along with caramel fumes. Experiment 2 : She mixed sand and crushed naphthalene balls in a China dish. Then she covered the China dish with a watch glass with some ice kept on it and heated. Crystals of pure naphthalene were seen on the underside of the watch glass. Identify the changes taking place in these experiments. A. Experiment 1 - Chemical change, Crystallisation Experiment 2 - Physical change, Decomposition B. Experiment 1 - Physical change, Crystallisation Experiment 2 - Chemical change, Sublimation C. Experiment 1 - Physical change, Crystallisation Experiment 2 - Physical change, Crystallisation D. Experiment 1 - Chemical change, Decomposition Experiment 2 - Physical change, Sublimation and Crystallisation 34. Read the following statements and select the option which correctly fills any three blanks. (i) In (a) irrigation emitters let out trickling water near the roots. (ii) Removing the chaff from the grain is called (b) , while separation of the grain from the crop is called (c) . (iii) The organic substance obtained from dead plants and animal wastes is (d) . (iv) Wheat and gram are rabi crops, while maize and (e) are kharif crops. A. (b) – Winnowing, (d) – Manure, (e) – Oats B. (b) – Winnowing, (c) – Threshing, (e) – Cotton C. (a) – Drip, (d) – Fertilizer, (e) – Mustard D. (a) – Sprinkler, (b) – Threshing, (c) – Winnowing 5 35. Refer to the given diagram of nitrogen cycle. Ammonia T Death N2 cycle S R P Q Bacterial oxidation Match the letter from the above diagram with the processes/substances given below and select the correct option. (a) Animal protein (b) Nitrate ion (c) Plant protein (d) Nitrite ion (e) Dead organic matter P Q R S T A. (b) (d) (c) (a) (e) B. (b) (d) (a) (c) (e) C. (d) (b) (a) (c) (e) D. (d) (b) (c) (a) (e) 36. Red A. B. C. D. Data Book keeps the record of _______. Endangered animals and plants Endemic animals and plants Extinct animals and plants Both A and C 37. Study the given flow chart. Biosphere Reserve Parts X Y Z Strongly protected for the conservation of biological diversity Provides space for environmental research and education Provides space for forestry, agriculture and tourism Which of the following is suitable heading for X, Y and Z? X Y Z A. Core zone Manipulation Buffer zone zone B. Buffer zone Core zone Manipulation zone C. Manipulation Buffer zone Core zone zone D. Core zone Buffer zone Manipulation zone 38. Natasha put a plant cell and an animal cell of similar size in two similar dishes containing the same amount of water overnight. The next day, she observed the cells under the microscope and noticed that the animal cell has burst and the plant cell looked more bloated. She drew the following conclusions: (i) The animal cell has only a thin layer of cell membrane. When too much water enters it, it bursts. 6 (ii) Plant cell has cell wall made up of cellulose which is very strong material and prevents the cell from bursting. (iii) The plant cell contains vacuole and therefore can absorb more water. (iv) The animal cell does not possess vacuole. Which of the above given conclusions are correct? A. (i) and (ii) B. (iii) and (iv) C. (i), (ii) and (iii) D. All of these 39. Select the incorrect statement regarding the given figure. S R Q P T A. B. C. D. The part labelled P produces both male gametes and androgen. The sperms collect and mature in Q. The parts R and S have no role in reproduction. The part T is located outside the abdominal cavity and protects P and Q inside it. 40. Study the given Venn diagram. X is likely to be _______. Noise Pollution X Land Pollution A. B. C. D. Water Pollution Air Pollution A group of people smoking cigarettes Youngsters dancing in a disco A farmer spraying pesticides near a river Construction work going on at a building site 41. Which of the following organisms has been incorrectly described? Organism Adaptation A. Fennec Has large ears to increase fox exposed area to lose heat quickly B. Morning Has twining stems to climb glory up around a support C. Owl Has talons to grip prey tightly D. Walrus Has blowholes on the top of the body to allow breathing of atmospheric air while the rest of the body is under water Habitat Desert Forest Forest Ocean | 18th NSO | Class-8 | Set-1 | Level 1 42. Study the given flow chart. Food enters mouth Food moves down the gullet Food is chewed Complete digestion of food and absorption of Q occurs Substance P kills bacteria present in food and helps in digestion Movement of waste for storage in rectum and extraction of substance R 44. Unscramble the given words and select the option that gives name of the process of washing wool with soap water to remove dirt and greese. A. B. C. D. NSERHAIG DCNRIAG GTRNSOI GURSOCNI 45. Refer to the given figure showing cross-section of a flower and select the correct option to fill the blanks in the following paragraph. What are P, Q and R respectively? P Q R A. Saliva Nutrients Hydrochloric acid B. Saliva Water Waste C. Hydrochloric acid Nutrients Water D. Bile Water Waste P Q 43. Transpiration is the loss of water from the surface of a plant. Which of the following statements describes why this process is useful for plants? A. B. C. D. It cools down plants, preventing overheating on sunny days. It helps the plant to get rid of excess water, protecting plant cells from bursting. It enables the mass flow of inorganic nutrients and water up the plant body. Both A and C S R T Fertilization takes place when pollen grains from the male part, (i) reach the part of the flower labelled (ii) . The (iii) increases in size and becomes the fruit, while (iv) becomes the seeds. A. B. C. D. (i) P T S S (ii) R Q Q R (iii) Q Q R Q (iv) R R Q R Achievers section Direction : Refer to the given passage and answer questions 46 and 47. We can see an image not only on a plane surface, but also on a curved one. For example we can see our image on a steel spoon. The image formed at the outer surface of a spoon is upright and the image formed at the inner surface of the spoon is smaller and inverted. 46. The outer surface of the spoon which is bulging out acts like a ________ and inner side of spoon acts like a ________. A. B. C. D. Concave mirror, convex mirror Convex mirror, concave mirror Plane mirror, convex lens Concave lens, concave mirror 47. If we move the spoon (inner surface) slowly away from our face, how does the image change? A. The image becomes bigger and it appears upright. B. The image becomes bigger and it appears inverted. 18th NSO | Class-8 | Set-1 | Level 1 | C. D. The image becomes smaller and it appears inverted. The image becomes smaller and it appears upright. 48. Refer to the given figures of bacteria X, Y and Z and read the statements (i), (ii), (iii) and (iv) regarding them. X Y Z (i) Bacterium X can be causal organism of typhoid. (ii) Bacterium Y can cause a disease which disrupts proper exchange of gases. (iii) Bacterium Z can convert lactose sugar of milk into lactic acid. (iv) Bacterium X can be the causal organism of cholera. Which of these statements are incorrect? A. (i) only B. (i) and (ii) only C. (ii), (iii) and (iv) only D. (i), (ii), (iii) and (iv) 7 49. A copper vessel exposed to moist air for a long time is shown in figure  I and sulphur powder is burnt in oxygen as shown in figure II. 1, 2, A. B. C. D. 3 and 4 are respectively CuO, CO2, SO2, H2SO3 CuCO3, Cu(OH)2, H2SO3, SO2 Cu, CuO, H2S, H2SO4 Cu(OH)2, CuCO3, SO2, H2SO3 50. Diabetics who are on rapid-acting insulin are advised not to wait more than 15 minutes to eat after taking an insulin shot. Which of the following best explains this? A. B. C. D. Insulin is required for the proper absorption of nutrients in the small intestine. The insulin injection may prevent the body from absorbing the glucose necessary to maintain blood glucose concentrations. The injection of insulin can lead to dangerously low blood glucose concentration. The insulin injection can lead to dangerously low blood calcium concentration. SPACE FOR ROUGH WORK 8 | 18th NSO | Class-8 | Set-1 | Level 1 Class 8 18th Set 2 Year 2015 logical reasoning If it is possible to make a meaningful word with the st th th st 1 , 12 , 15 and 21 letters of the given arrangement, then which will be first letter of the word so formed? If no such word can be formed, give X as the answer and if more than one such word can be formed, give P as the answer. ESGBDLUNKHWACZTVXFIJMO QYPR A. C. 2. Two positions of a dice are shown below. How many dots will be on the top when 2 dots are at the bottom? A. B. C. D. 3. Which of the following figures will continue the series as established by the Problem Figures? Problem Figures M X B. D. T P 6 5 1 4 8 12 9 A. C. B. If '+' is called '×', '–' is called '÷', '×' is called '–' and '÷' is called '+', then the value of 16 ÷ 64 – 8 × 4 + 2 is _____. A. 12 B. C. 18 D. 5. Study the following information carefully: (i) B5D (ii) B9D (iii) B4D (iv) B3D Which of K? means B is the means B is the means B is the means B is the the following father of D. sister of D. brother of D. wife of D. means F is the mother of A. C. 6. In the given diagram, rectangle represents men, triangle represents educated, circle represents urban and square represents government employees. 2 F3M5K F9M4N3K 16 24 B. D. F5M3K F3M5N3K 13 14 11 Which of the following represents a man who is urban as well as government employee but not educated ? A. C. 7. Select the correct mirror image of the given combination of letters & numbers, if the mirror is placed vertically to the left. A. C. 8. Persons X, Y, Z and Q live in red, green, yellow or blue coloured houses placed in sequence on a street. Z lives in a yellow house. The green house is adjacent to the blue house. X does not live adjacent to Z. The yellow house is in between the green and red houses. The colour of the house X lives in is ______. A. C. 9. In which of the following figures, Fig. (X) is exactly embedded as one of its part? D. 4. 4 7 5 ? 10 6 7 10 B. D. 13 6 L5OGI32CAL B. LAC23IGO5L L5OGI32CAL D. L5OGI32CAL 1. Blue Red B. D. A. B. C. D. Green Data inadequate Fig. (X)  10. There is a certain relationship between fig. (i) and (ii). Establish the similar relationship between fig. (iii) and (iv) by selecting a suitable figure from the options that will replace the (?) in fig. (iv). ? (i) (ii) (iii) A. B. C. D. (iv) | 18th NSO | Class-8 | Set-2 | Level 1 Science 11. Read the given statements and select the correct option. 15. Match the column I with column II and select the correct option from the given codes. Statement 1 : Sound travels faster on a rainy day than on a dry day. Statement 2 : Moisture increases the pressure. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true and statement 2 is false. D. Both statements 1 and 2 are false. Column I Column II (a) Limiting friction (i) Self adjusting force (b) Static friction (ii) Less than sliding friction (c) Dynamic friction (iii) Maximum value of static friction (d) Rolling friction (iv) Less than limiting friction A. (a) – (ii), (b) – (i), (c) – (iv), (d) – (iii) B. (a) – (iii), (b) – (i), (c) – (ii), (d) – (iv) C. (a) – (iv), (b) – (ii), (c) – (i), (d) – (iii) D. (a) – (iii), (b) – (i), (c) – (iv), (d) – (ii) 12. A student has a large tank of water in which he wants to set up a convection current. Which of the following actions will help him to do it? A. Cooling at Q B. Cooling at R C. Heating at P D. All of these Q R Water P 13. A narrow beam of white light is passed through a glass prism as shown in the figure. Narrow beam of white light R Q Screen Which of the following is the correct order of colours emerging from the prism? P Q R A. Red Blue Green B. Red Green Blue C. Blue Green Red D. Blue Red Green 14. The diagram shows a method to magnetise an iron nail. In which diagram will the iron nail become an induced magnet? B. A. C. N (Take g = 10 N kg–1) A. B. C. D. P Glass prism –2 16. A floor has a maximum loading capacity of 5 kN m . Which of the following is allowed on this floor? S D. Iron bar 18th NSO | Class-8 | Set-2 | Level 1 | An elephant weighing 50 kN stands on 4 legs with each foot covering 400 cm2 of the floor. A 50 kg lady wears a pair of high heel shoes, each 2 shoe has a contact area of 9 cm with the floor. A 100 kg washing machine stands on a surface 2 area of 6500 cm . A designer’s table weighing 1000 N stands on 2 3 legs, each leg has a contact area of 0.1 cm with the floor. 17. The diagram shows the melting and boiling points of four different substances. Which substance is in solid state at 0°C and liquid state at 1400°C ? Melting point 0 1 200 400 600 2 4 A. C. Boiling point 1 3 Temperature(°C) 800 1000 1200 1400 1600 1800 3 B. D. 2 4 18. A vessel contains two plane mirrors at right angles to each other as shown here. If the vessel is filled with water, then the total deviation in the ray incident normally is A. 0° B. 45° C. 90° D. 180° 90° 3 19. Which of the following options is true regarding the number of moons of the given planets? A. Mars < Earth < Uranus < Neptune < Jupiter B. Earth < Mars < Jupiter < Uranus < Neptune C. Earth < Mars < Neptune < Uranus < Jupiter D. Jupiter < Earth < Mars < Neptune < Uranus 20. An iron block of dimensions 5 cm × 10 cm × 15 cm has to be pushed along the floor. The force required will be minimum when the surface in contact with ground is A. B. C. D. (10 cm × 15 cm) surface (5 cm × 15 cm) surface (10 cm × 5 cm) surface Force is same for all surfaces. X Orion Sirius Pole star Pole star Y Cassiopeia Orion Sirius Orion A. C. 1 2 1 3 X Velocity (m s–1) 22. For the velocity-time graph shown here, the distance covered by the body in last two seconds of its motion is what fraction of the total distance covered by it in six seconds? D. 1 4 2 3 Which of the following shows the positions of balls when a heavy positively charged sphere is placed near them? A. C. 4 B. D. –1 0.21 cm s 21 cm s–1 B. D. 2.1 cm s–1 0.021 cm s–1 26. Rohit has performed an activity to test whether the following materials conduct electricity or not by putting them in the circuit, one at a time as shown in the figure. 10 8 6 4 2 23. Two identical neutral light conducting balls suspended by insulating threads touch each other as shown. A. C. Y 0 1 2 3 4 5 6 Time (s) B. 25. The second's hand of a watch is 2 cm long. The speed of the tip of second's hand is 21. The given diagram shows the night sky in which stars are visible. Identify the star X, and the constellation Y from the figure. A. B. C. D. 24. Which of the following statements are true? (i) Beautiful patterns formed in a kaleidoscope is due to irregular reflections. (ii) Two plane mirrors when placed parallel to each other give infinite number of images. (iii) Real image is always inverted. (iv) Virtual image can be taken on a screen. A. (i) and (ii) B. (ii) and (iii) C. (iii) and (iv) D. (i) and (iv) Materials X and Y could be X Y A. 1, 3, 4, 6 2, 5 B. 1, 5, 6 2, 3, 4 C. 1, 3, 6 2, 4, 5 D. 2, 3, 4, 5 1, 6 27. Fill in the blanks by choosing an appropriate option. Each cell in our body contains an acid, the (i) . It controls every feature of the body such as our looks, colour of our eyes, our height, etc. Proteins that build part of our cells are also made of (ii) . The fats in our body contain (iii) . (i), (ii) and (iii) respectively are A. Amino acids, deoxyribonucleic acid, fatty acids B. Deoxyribonucleic acid, fatty acids, amino acids C. Deoxyribonucleic acid, amino acids, fatty acids D. Fatty acids, deoxyribonucleic acid, amino acids. 28. Find A. B. C. D. the incorrect match. Haemoglobin – Magnesium Fertilisers – Nitrogen and phosphorus Chlorophyll – Iron Both A and C | 18th NSO | Class-8 | Set-2 | Level 1 29. Read the given statements and select the correct option. Statement 1 : Bakelite is used for making electrical switches and handles of various utensils. Statement 2 : Bakelite is a good conductor of heat and electricity. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true and statement 2 is false. D. Both statements 1 and 2 are false. 30. Select the incorrect statements among the following. 33. Water is not a suitable fire extinguisher to douse the fires involving oil and petrol because A. B. C. D. 34. X, Y and Z are three methods of weeding. X can be done by ploughing, harrowing etc. Y involves the use of chemicals whereas Z employs biological agents to control weeds. Identify X, Y and Z and select the correct option regarding this. (i) Bitumen is used for metalling the roads. (ii) Some inexhaustible natural resources like coal, petroleum and natural gas formed from the dead remains of living organisms are known as fossil fuels. (iii) Many useful substances are obtained from coal so, it is also called ‘Black gold’. (iv) Natural gas is used as a starting material for the manufacture of a number of chemicals and fertilisers. A. (i) and (ii) B. (ii) and (iii) C. (ii) and (iv) D. (i), (ii) and (iv) A. B. C. D. 31. Match the column I with column II and select the correct option from the given codes. Column I Column II P. Zinc carbonate (i) turns methyl orange red Q. Citric acid (ii) treats acidic soil R. Slaked lime (iii) potassium hydroxide S. Soap (iv) remedy for ant's bite P Q R S A. (i) (iii) (iv) (ii) B. (ii) (iv) (iii) (i) C. (iv) (i) (ii) (iii) D. (iii) (ii) (iv) (i) A. B. C. D. 32. Observe the given Venn diagram carefully. 1 – Extraction of metal from its oxide using electricity 2 – Burning of a candle 3 – Sublimation of naphthalene balls X and Y respectively are A. Physical and chemical changes B. Chemical and physical changes C. Both chemical changes D. Both physical changes. 18th NSO | Class-8 | Set-2 | Level 1 | Water may conduct electricity Water is heavier than oil Water cannot be stored at high pressure in cylinders Water is lighter than oil. In small fields, X method involves the use of trowel or hoe which is time consuming and involves a lot of labour. Y method involves the use of poisonous chemicals like metachlor which kill the weeds and may affect the health of farmers and all the consumers. Z method is a safer method to kill weeds as it employs insects which feed on weeds thereby checking their growth and has no side effects on the crop plant and its consumers. All of these 35. Which of the following statements is incorrect regarding Biosphere Reserve? Biosphere Reserves are multipurpose protected areas meant for conserving genetic diversity, ecosystems and landscapes without uprooting the local people. Each Biosphere Reserve supports education and research in various ecological aspects of the ecosystem. Ample human activities like cultivation, recreation, forestry etc., are allowed in the core zone of a Biosphere Reserve. A Biosphere Reserve may include other protected areas such as National Parks. 36. The given picture shows a set-up at the start of an experiment, X and after a few days, Y. The change observed in set up Y is due to Swollen tissue Stem with phloem removed A. B. C. D. X Y Upward movement of food getting blocked Downward movement of food getting blocked Upward movement of water getting blocked Downward movement of water getting blocked. 5 37. Use the given dichotomous key and select the correct option. I. (a) They are mostly single-celled organisms. - Go to II (a) (b) They are classified on the basis of shape. - Go to II (b) and III (b) II. (a) They live together in colonies of millions. - Go to III(a) (b) The rod shaped are called P . III. (a) They reside in our intestine and help in the process of digestion. - Q (b) The comma-shaped and spherical are respectively called R and S . P Q R S A. Spirillum Amoeba Coccus Vibrio B. Vibrio Streptococcus Spirillum Coccus C. Bacillus Plasmodium Coccus Vibrio D. Bacillus E.coli Vibrio Coccus 38. Refer to the given figure and select the incorrect statement(s). P (i) C. D. The scarlet king snake looks very much like the poisonous coral snake. A treehopper on a leaf or twig resembles a thorn. 41. Study the given flow chart and identify P, Q and R. Pollutants which can be decomposed by microbes Can be Yes recycled P Q A. Livestock Styrofoam wastes cup B. Garbage BHC C. Sewage DDT sludge D. Livestock BHC wastes 40. Which of these is a behavioural adaptation? A. A hognose snake pretends as dead to trick the predator. B. A frog’s light-coloured belly makes it harder for a predatory fish to see it against sunlight on the water surface. 6 Aluminium cans Styrofoam cup Grocery Sunlight Bubbles of gas Inverted test tube Beaker Inverted funnel P In Q, the sperm and ovum fuse to form zygote. Development of foetus takes place in S. R is the site of implantation of embryo. One of the functions of P is to control secondary sexual characters. R DDT 42. Rahul conducted an experiment as shown here. Water containing NaHCO3 S A. B. C. D. Q No Q P No 39. Refer to the given diagram with its parts labelled as P, Q, R and S. Which of the following statements is incorrect regarding this? R Yes R The part labelled P is found in plant cell only. R (ii) The part labelled Q is cell Q wall, which provides rigidity to a plant cell. (iii) The part labelled R is the controlling centre. (iv) The part labelled R gets its shape from part labelled P. A. (iv) only B. (i) and (iv) only C. (ii) and (iii) only D. (iii) only Hydrilla plant Support to keep funnel off bottom Which of the following statements is correct regarding this? A. Hydrilla plant cannot photosynthesise as CO2 is not available to the plant. B. NaHCO3 present in the water absorbs all CO2 dissolved in it. C. Sunlight cannot reach the plant properly and hence photosynthetic rate of the plant is affected. D. The bubbles produced in the water within test-tube are mainly of oxygen gas. | 18th NSO | Class-8 | Set-2 | Level 1 43. Read the given paragraph. The female silk moth lays hundreds of tiny eggs at a time. The eggs are cooled to a suitable temperature to hatch. The tiny silkworms or caterpillars are kept in clean bamboo trays along with neem leaves. The caterpillars feed continuously and undergo moulting nine times. Then they stop eating and are ready to enter pupal stage. They spin cocoon around themselves which takes around eight days. Some of the words have been italicised. Select the correct option regarding them. A. Cooled should not be replaced as it is correctly mentioned. B. Neem should be replaced by pomegranate. C. Nine should be replaced by four. D. Eight should be replaced by twenty. 44. Match column I with column II and column III and select the correct option from the given codes. Column I Column II Column III 1. Budding P. Salamander a. Asexual reproduction 2. Fission Q. Yeast 3. Ovipary R. Paramecium b. Sexual reproduction 4. Vivipary S. Platypus T. Flying fox A. B. C. D. P a, 3 b, 3 b, 4 a, 2 Q b, 2 a, 1 a, 2 b, 1 R b, 1 a, 2 a, 1 b, 3 S b, 4 b, 3 a, 3 b, 2 T b, 3 b, 4 a, 4 b, 4 45. Rita set up an experiment as shown here. Soda lime to absorb CO2 Test-tube Germinating seeds Capillary tube Drop of uid What will happen to the drop of fluid in the capillary tube over the next few hours? A. B. C. D. It will move away from the test tube because of oxygen output by the seeds. It will move towards the test tube because of carbon dioxide intake by the seeds. It will move towards the test tube because of oxygen intake by the seeds. It will not move, because carbon dioxide intake and oxygen output are equal. Achievers section Direction: Refer to the given passage and answer the following questions 46 and 47. The given figure shows the electroplating of copper over a flower vase made of iron. It is done by the process of electrolysis. Battery + Y X Flower vase Copper sulphate solution (Z) 46. Identify X, Y and Z from the figure. X Anode Cathode Electrolyte Cathode Y Cathode Anode Cathode Electrolyte Z Electrolyte Electrolyte Anode Anode 47. During electrolysis, positively charged _______ ions move towards flower vase and negatively charged _______ ions move towards copper rod. 18th NSO | Class-8 | Set-2 | Level 1 | A. B. C. D. Sulphate, Copper Copper, Sulphide Copper, Sulphate Sulphate, Sulphide 48. Read the given statements each with one or two blanks in it. Copper rod A. B. C. D. P. (i) allows water, minerals and some other necessary substances to move across cell. Q. The liquid in the nucleus is called (ii) in which are suspended thread-like structures called (iii) . R. (iv) are called powerhouse of cell whereas (v) are called kitchens of cell. S. (vi) help to destroy old cell structures and (vii) take part in protein synthesis. Select the option which correctly fills some of the blanks in these statements. A. B. C. D. (i)-Cell wall, (ii)-Genes, (v)-Centrosome (ii)-Nucleoplasm, (iv)-Mitochondria, (vi)-Lysosomes (iii)-Plastids, (vi)-Lysosomes, (vii)-Ribosomes (v)-Chloroplasts, (vi)-Centrosome, (vii)-Endoplasmic reticulum 7 50. The given graph shows changes in levels of two factors X and Y present in a river due to run-off pollution. Levels 49. Each of the given beakers contains two metal strips of same size fastened together and immersed in hydrochloric acid. Y X After 5 minutes, amount of Q ions formed is greater than P ions in beaker  1, S ions is greater than R ions in beaker 2, R ions is greater than Q ions in beaker 3, and T ions is greater than S ions in beaker 4. Correct order of reactivity of these metals is A. P > Q > R > S > T B. R < P < T < S < Q C. T > R > Q > P > S D. P < Q < R < S < T Run-off pollution Time Which of the following statements is correct regarding this? A. X could be an aquatic plant population whereas Y could be a fish population. B. X could be dissolved oxygen in river whereas Y could be a bacterial population. C. X could be dissolved oxygen in river whereas Y could be a fish population. D. X could be a bacterial population whereas Y could be an aquatic plant population. SPACE FOR ROUGH WORK 8 | 18th NSO | Class-8 | Set-2 | Level 1 Class 8 19th Set A Year 2016 logical reasoning 1. 2. If each vowel in the word MOUNTAIN is replaced by the next letter in the English alphabet and each consonant is replaced by the previous letter in the English alphabet, then which of the following will be the fourth letter to the left of seventh letter from the left end? A. T B. V C. N D. P Select a figure from the options which will continue the same series as established by the Problem Figures. Problem Figures A. 5. In which of the following options, Fig. (X) is exactly embedded as one of its part ? Fig. (X) A. B. C. D. 6. Select the option in which specified components of the Fig. (X) are found? B. Fig. (X) C. 3. Study the following arrangement carefully and answer the question given below. BA5D%RI* F H 6 #V9 $ 3 E 7 G 1 ÷ 2 M K X8UFWZN What should come in place of the (?) in the following series based on the above arrangement ? ADI F69 37÷ ? A. 2KU B. MXU C. MXF D. XUM 4. 2 D. Two rows of numbers are given. The resultant number in each row is to be worked out separately based on the following rules. The operations on numbers progress from left to right. Rules : (i) If a two-digit odd number is followed by a prime number, the first number is to be multiplied by the prime number. (ii) If an even number is followed by another even number, the first number is to be divided by the second number. (iii) If an odd number is followed by a composite odd number, the first number is to be added to the second number. (iv) If an even number which is a multiple of 5 is followed by another number which is again a multiple of 5, the second number is to be subtracted from the first number. (v) If a number which is a perfect square is followed by another number which is also a perfect square, then the square roots of the two numbers is to be multiplied. 64 25 25 88 8 n If n is the resultant of the first row, what is the resultant of the second row? A. 24 B. 36 C. 28 D. 26 A. C. 7. Find the missing number, if a certain rule is followed row-wise or column-wise. 3 15 4 A. 15 B. 18 7 38 5 C. 19 3 ? 5 D. 20 B. D. 8. Which of the following options most closely resembles the water image of given combination of letters and numbers? A. C. 9. P, Q, R, S, T, V and W are sitting around a circle facing the centre. R is third to the right of V, who is second to the right of P. T is second to the left of Q, who is second to the left of W. V is sitting between S and W. Who is sitting between T and V? A. W B. R C. S D. Can't be determined B. D. 10. Read the following information carefully. 'A«B' means 'A multiplied by B'. 'A@ B' means 'A minus B'. 'A $ B' means 'A plus B'. 'A # B' means 'A divided by B'. Mohit donates 7% of his monthly salary R to charity and spends ` 3,000 per month on his house rent. What is the amount left with him out of his monthly salary after excluding house rent and charity amount? A. R @ (3000 @ 7 « 100#R) B. R @ (7 « R # 100 @ 3000) C. R @ (R « 7 # 100 $ 3000) D. None of these | 19th NSO | Class-8 | Set-A | Level 1 Science 11. A simple pendulum, oscillating with time period T, is shown in the figure. Time taken by the bob to move from A to C is t1 and from C to O is t2. Then Extreme Point A A. B. C. D. C O Extreme B Point Motion of the bob is uniform with T = 2(t1 + t2) Motion of the bob is uniform with T = 4(t1 + t2) Motion of the bob is non uniform with T = 2(t1 + t2) Motion of the bob is non-uniform with T = 4(t1 + t2). 12. A box is being pushed horizontally along a rough surface and a constant acceleration is achieved. If the push is stopped, the box will A. B. C. D. Slow down and finally stop Continue to move at constant speed Continue to accelerate at a lower rate Stop immediately. 13. A block of mass 4 kg and dimensions 10 cm × 20 cm × 30 cm rests on the floor. If g = 10 m s–2 , then the maximum pressure the block can exert on the floor is A. C. 2000 N m–2 4000 N m–2 B. D. 1000 N m–2 1333 N m–2 14. Which of the following statements are true about both light and sound ? (i) They are forms of energy. (ii) They can be converted into other forms of energy. (iii) They undergo reflection. A. (i) and (ii) only B. (ii) and (iii) only C. (i) and (iii) only D. (i), (ii) and (iii) 15. Which of the following options correctly represents the relative positions of the Sun (S), Moon (M) and Earth (E) on the day of full moon and new moon? 17. The given figure shows a set-up for testing conduction of electricity in different liquids. Pick out the group of liquids for which the bulb will not glow. A. Milk, Lemon juice, Tap water, Honey B. Vinegar, Tap water, Kerosene, Lemon juice C. Honey, Kerosene, Vegetable oil, Distilled water D. Vegetable oil, Distilled water, Vinegar, Kerosene 18. Why does a horse need to pull harder during the first few steps in pulling the cart? A. B. C. D. 19. Which of the following statements are correct? (i) Venus is the hottest planet of the solar system. (ii) Jupiter is called the red planet as it has a large red spot on its surface. (iii) Revolving speed of Mercury is fastest of all planets. (iv) Mars has no natural satellites of its own. (v) Saturn is the least dense planet among all planets. A. (ii) and (iii) only B. (ii), (iv) and (v) only C. (i), (iii) and (v) only D. (i), (ii), (iv) and (v) only 20. Two uncharged conducting spheres are placed in contact with each other. Which of the following diagrams best represents the charge distribution when a negatively charged rod is placed near one of them? A. B. 16. What is the use of cooking oil in frying a fish in terms of heat transfer? C. A. D. B. C. D. Full Moon New Moon A. MES MSE B. SME ESM C. SEM SME D. ESM EMS To increase rate radiation. To increase rate convection. To increase rate conduction. To increase rate evaporation. of heat transfer to the fish via of heat transfer to the fish via of heat transfer to the fish via of heat transfer to the fish via 19th NSO | Class-8 | Set-A | Level 1 | Static friction is greater than sliding friction. Sliding friction is greater than rolling friction. No frictional force acts after the cart comes in motion. Air friction is greater during first few steps of motion. 21. The intensity of sound wave gets reduced by 10% on passing through a slab. The total reduction in intensity on passing through three consecutive slabs is A. 30% B. 70% C. 27.1% D. 72.9% 3 22. The given table shows the melting and boiling points of four elements. Element E1 E2 E3 E4 Melting point 198°C –101°C 185°C 20°C Boiling point 390°C 150°C 1087°C 160°C Which element is in liquid state at 311°F? A. E4 B. E3 C. E2 D. E1 23. The given diagram shows a girl standing at a position X in front of a plane mirror, at a distance of x m from the mirror. When she moves y m away to a new position Y, the distance between the girl and her image increases by 8 m. What is the value of y ? A. B. C. D. 2 m 4m 8 m Data insufficient 24. Read the given statements and select the correct option. Statement 1 : Smoke goes upwards. Statement 2 : The warm air is lighter than the cold air. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true but statement 2 is false. D. Both statements 1 and 2 are false. Statement 2 : The process represents a physical change as the substance formed is composed of same elements sulphur, oxygen and hydrogen. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true and statement 2 is false. D. Both statements 1 and 2 are false. 27. Match the Column I with Column II and select the correct option from the given codes. Column I Column II (i) Turmeric solution (P) Aqueous solution of remains yellow sodium bicarbonate (ii) China rose indicator (Q) Aqueous solution turns green of sugar (iii) Methyl orange (R) Aqueous solution of indicator turns red ammonium hydroxide (iv) Phenolphthalein (S) Aqueous solution indicator turns pink of hydrogen chloride gas (i) (ii) (iii) (iv) A. Q, S R, S P, S P, R B. P, R S P, R Q, S C. Q, S P, R S P, R D. P Q R S 28. Fill in the blanks left in the classification of the fossil fuels. Fossil fuels Plants and trees Gaseous product u Which of the following statements is correct regarding the given circuit? A. When switch 2 is closed and switch 1 is open, all the three lamps glow. B. When switch 2 is closed and switch 1 is open, only lamp 1 and lamp 3 glow. C. When switch 1 is closed and switch 2 is open, only lamp 2 glows. D. When both switch 1 and switch 2 are closed, all the three lamps glow. 26. Read the given statements and select the correct option. Statement 1 : The gas produced on burning sulphur in air is dissolved in water to form an acidic solution. 4 q Destructive distillation 25. The given figure shows a circuit which contains three identical lamps and two switches. Aquatic plants and animals p Solid residue Fractional distillation Gaseous product w v p q A. Petro- Coal leum B. Coal Petroleum Solid residue x u v w x Petro- Bitumen Coal gas Coke leum Coal Coke PetroBitugas leum gas men C. Coal Petro- Coal CharGasoline Coal leum gas coal tar D. Petro- Coal Gaso- Bitumen Natural Coke leum line gas 29. When a copper vessel is exposed to moist air for long, it acquires a dull green coating. The reaction can be represented as 2Cu + → Cu(OH)2 + Z W, X, Y and Z are respectively A. N2 , CO2 , O2 and CuO B. H2O, N2 , CO2 and O2 | 19th NSO | Class-8 | Set-A | Level 1 C. D. H2O, CO2 , O2 and CuCO3 H2O, CO2 , O2 and CuO. 30. Fill in the blanks by choosing an appropriate option. Acids are compounds that contain (i) atoms. Sulphuric acid is one such example which is a (ii) acid. It is neutralised by alkalies and forms salts called (iii) . Acids react with metals to give (iv) gas. (i) (ii) (iii) (iv) A. Hydrogen Weak Sulphites Oxygen B. Oxygen Weak Sulphates Hydrogen C. Hydrogen Strong Sulphites Oxygen D. Hydrogen Strong Sulphates Hydrogen 31. Which of the following statements are true? I. In the luminous zone of candle flame, vaporised wax gets oxidised to carbon dioxide which burns with a blue flame. II. There is no burning in the dark inner zone of the flame. III. Non luminous zone is the hottest part of the flame. IV. Luminous zone of a f lame is mainly due to incomplete burning of carbon. A. I and III only B. II and III only C. II, III and IV only D. All of these 32. Rahul, a class 8 student conducted the following experiment and recorded the observations in the given table. Z : I do not get wrinkled easily. I burn slowly and produce black smoke. W, X, Y and Z are respectively A. Terylene, rayon, cotton and nylon B. Bakelite, nylon, rayon and cotton C. Melamine, PVC, nylon and rayon D. Nylon, cotton, rayon and polyester. 34. Refer to the given Venn diagram and select the correct option regarding P, Q and R. Plants that grow in nitrogen deficient soil P Plants that are leafless and rootless Q R Plants that prepare their carbohydrates through photosynthesis A. B. C. D. Plant P possesses special root like structures called haustoria for absorption of nitrogen from atmospheric air. Plant Q catches and digests insects and shows completely heterotrophic mode of nutrition. R could be Nepenthes or Rafflesia. P could be Dionaea whereas Q could be Cuscuta. 35. Refer to the given figures and select the correct option regarding species P, Q and R. Observation Does balloon explode? Is ignition temperature of balloon reached? Fig. 1 Fig. 2 Fig. 1 Fig. 2 I. Yes Yes No Yes II. Yes No Yes No III. No Yes Yes Yes The correct observation and inference drawn are A. I, balloon has a higher ignition temperature than water hence, it explodes B. II, water increases the melting point of balloon C. III, water in the balloon absorbs the heat D. II, water conducts the heat away from the balloon. 33. The characteristics of different fibres are listed as W : I am strong, elastic, light and burn slowly. I shrink on heating and form hard beads with smell of burning hair. X : I burn completely leaving no residue. Y : I can be woven like silk fibres and dyed in a wide variety of colours. I burn quickly with a smell of burning paper. 19th NSO | Class-8 | Set-A | Level 1 | A. B. C. D. Fruits of species P burst open forcibly after drying and seeds are scattered nearby. Seeds of species R possess wings or hair-like structures. P could be Hiptage whereas Q could be balsam. Seeds of species Q are heavy and bear spines or hooks. 36. Read the given paragraph with few blanks and select the option that correctly fills up any 3 of these. (i) is the ability to blend with the surroundings. It is protective to prey insects like (ii) and also advantageous to predators like (iii) . (iv) is the resemblance of one species with another. The species which is imitated is called (v) while the species which imitates is called (vi) . A. (i) – Mimicry, (iv) – Camouflage, (vi) – Mimic B. (ii) Leaf insect, (iv) – Mimicry, (v) – Model C. (i) – Camouflage, (iii) – Praying mantis, (vi) – Model D. (ii) – Grasshopper, (iii) – Stick insect, (v) – Mimic 5 37. The given figure represents the pattern of blood circulation in human body. Select the correct statement regarding this. A. Q and R carry deoxygenated blood whereas P and S carry oxygenated blood. B. X represents right side of heart, i.e., right atrium and ventricle. C. Q and P carry oxygenated blood whereas R and S carry deoxygenated blood. D. Y represents left side of heart, i.e., left atrium and ventricle. 38. The given figure shows positions of few endocrine glands in human body. Two patients, Ravi and Sohail recently visited an endocrinologist regarding their health issues. Doctor examined them and prepared a chart shown here to keep a record of their illness and monitor their health. (iv) Some species of X help in manufacture of ethyl alcohol whereas several species of Y help in biological nitrogen fixation. (v) Several species of groups X and Y are used in making antibiotics. A. (i), (ii) and (iii) only B. (i), (iii) and (v) only C. (ii) and (iv) only D. (iv) and (v) only 40. Study the given flow chart. P No Cell organelle bound by double membrane Cell organelle bound by single membrane No Yes S Z No Present in animal cell Yes Q No Present in plant cell Yes X T Yes R Which of the following holds true for P, Q, R, S and T ? Y W P takes part in cell autophagy and autolysis whereas Q takes part in osmoregulation. R takes part in protein synthesis and is also present in bacteria. Inner membrane of T contains stalked particles whereas inner membrane of S is connected to thylakoids at various places. T takes part in preparation of food whereas S takes part in oxidation of food to release energy. A. B. Disease symptoms Swollen neck Large quantities of sugar in blood and urine Refer to the given figure and chart and select the correct option. C. D. A. B. 41. The given diagram shows a respirometer that is used to measure gaseous exchange in pea seeds. The apparatus is maintained at a constant temperature. C. D. Patient's name Ravi Sohail Ravi is suffering from goitre which is caused due to hyposecretion of a hormone by gland X. Ravi is suffering from cretinism which is caused due to hypersecretion of a hormone by gland Y. Sohail is suffering from diabetes which is caused by hyposecretion of a hormone by gland W. Sohail is suffering from diabetes which is caused by hypersecretion of a hormone by gland Z. 39. X and Y are two groups of microorganisms. Group X includes all unicellular forms which lack an organised nucleus. Group Y includes both unicellular and multicellular forms with organised nucleus. Both groups do not possess chlorophyll. Identify the groups and select the correct statements regarding them. Several species of groups X and Y help in decomposition of biodegradable wastes, thus help in waste disposal. (ii) Some species of groups X and Y possess thread like structures called hyphae. (iii) Species of X cause tuberculosis and anthrax diseases in animals whereas species of Y cause rust and smut diseases in plants. (i) 6 Which of the following is incorrect regarding this? A. B. C. D. The gas pressure in X will fall as O2 is absorbed during respiration and CO 2 is absorbed by potassium hydroxide solution. The fluid level at Y will fall to compensate the loss of pressure in X. The gas pressure at X will rise as O2 is given out by seeds and CO2 is released by potassium hydroxide solution. The fluid level at Z will rise due to loss of pressure at X. | 19th NSO | Class-8 | Set-A | Level 1 42. Refer to the given diagram of human male reproductive system and select the incorrect statement X regarding parts X, Y and Z. A. Z deposits sperms into the Z vagina of female during Y coitus. B. Y is similar in function to ovaries of female. C. X conducts sperms from testis to urethra. D. Y lies within scrotum in the abdominal cavity. 43. Identify P, Q and R in the given flow chart and select the correct option regarding them. Threatened species No Extinct species Yes Vulnerable species Yes A. B. C. D. R Yes No Endangered species P Yes Q P – Passenger pigeon, Q – Golden langur, R – Great Indian bustard P – Sloth bear, Q – Chinkara deer, R – Asian elephant P – Olive Ridley turtle, Q – Komodo dragon, R – Blue whale P – Dodo, Q – Red panda, R – Indian rhinoceros 44. Read the following statements and select the correct option. A. B. C. D. A daughter receives X-chromosome from her mother only. Human beings possess 22 pairs of autosomes and 1 pair of sex chromosomes. A new human individual develops from a cell called gamete only. Pituitary gland produces thyroxine. 45. Match column I with column II and select the correct option from the given codes. P. Column I Column II Anopheles (i) A fungus from which antibiotic is obtained Q. Rhizobium (ii) A viral disease R. Penicillium (iii) A bacterium responsible for curdling of milk S. Hepatitis B (iv) Nitrogen fixing bacterium T. Lactobacillus (v) Edible fungus U. Mushroom (vi) Vector for malarial parasite A. P-(vi), Q-(iv), R-(i), S-(ii), T-(iii), U-(v) B. P-(ii), Q-(v), R-(iii), S-(i), T-(vi), U-(iv) C. P-(iv), Q-(vi), R-(i), S-(v), T-(ii), U-(iii) D. P-(i), Q-(iii), R-(iv), S-(ii), T-(vi), U-(v) Achievers Section 48. The given graph shows the changes in various factors (P, Q and R) present in a water body after the sewage discharge at point X. Amount/Number DIRECTION (Q. No. 46 and 47) : Refer to the given passage and answer the following questions. A balloon is moving upwards  from ground with a constant speed of 10 m s–1 at a distance 5 m infront of a plane mirror of length 2 m as shown in figure. A source S is placed symmetrically before plane mirror. The plane mirror is placed at a height H = 15 m above the surface of ground. O 46. The maximum time interval during which a man inside the balloon can see the image of the source in the mirror is A. C. 2.2 s 4.6 s B. D. 1.7 s 0.5 s 47. When the balloon is at a height of 17 m from the ground, the man drops a stone from it then the maximum height attained by the stone will be (g = 10 m s –2) A. C. 17 m 22 m 19th NSO | Class-8 | Set-A | Level 1 | B. D. 20 m 27 m P X R Q Sewage discharge Distance downstream Refer to the given graph and select the correct option regarding P, Q and R. A. B. C. D. P could be bacteria which increase tremendously in number to decompose nitrogen rich sewage. Q corresponds to biological oxygen demand which decreases due to accumulation of sewage on water surface. R could be aquatic animals like fish which die on account of non-availability of dissolved oxygen. Both A and C 7 49. Ms. Deepika, a science teacher demonstrated an activity in the science lab and the experiment was set up as shown in the figure. Syringe steam metal X heat The metal ‘X’ reacts with steam to form a gas ‘Y’ which is collected in the syringe. Which of the following best describes the metal ‘X’ and gas ‘Y’? A. B. C. D. Metal ‘X’ is silver and gas ‘Y’ is hydrogen which burns with a pop sound. Metal ‘X’ is sodium and gas ‘Y’ is carbon dioxide which gives white precipitate with lime water. Metal ‘X’ is iron and gas ‘Y’ is hydrogen which burns with a pop sound. Metal ‘X’ is magnesium and gas ‘Y’ is carbon dioxide which gives white precipitate with lime water. 50. Read the given paragraph where few words have been italicised. Preparation of soil in a field, before sowing of seeds involves two steps : broadcasting and levelling. Soil in the crop field is enriched with nutrients by adding manures and fertilisers to it. Crop fields need to be irrigated from time to time. In sprinkler system of irrigation water is allowed to fall drop by drop from a pipe just near the plant roots whereas in drip irrigation water escapes from a revolving nozzle. Weeding in crop fields can be done using thresher. After the crop is harvested, the grain is separated from cut crop using a machine called harvester. Select the correct option regarding these. A. B. C. D. Broadcasting should be replaced by winnowing. Positions of sprinkler system and drip irrigation should be interchanged. Thresher should not be replaced as it is correctly mentioned. Harvester should be replaced by seed drill. SPACE FOR ROUGH WORK 8 | 19th NSO | Class-8 | Set-A | Level 1 Class 8 19th Set B Year 2016 logical reasoning 1. 2. 3. The minimum number of straight lines required to make the given figure is _____. A. 23 B. 22 C. 17 D. 18 The following letters are coded as follows. Letter :BMKATREUNHFIWDP Digit/Symbol : 7 % 5 © 6 9 8 2 @ 1 # $ 3 « 4 While coding the given letters following conditions are also to be observed. Conditions : (i) If the first letter is a vowel and the last letter is a consonant, both are to be coded as the code for the vowel. (ii) If the first letter is a consonant and the last letter is a vowel, codes for these two are to be interchanged. (iii) If both the first and the last letters are consonants, both are to be coded as the code for the last letter. MATRBW A. % © 6973 B. 3 © 6973 C. % © 697% D. 3 © 697% Select the figure from the options which will replace the (?) to complete the given figure matrix. A. B. C. D. 4. Mini goes to the Departmental Store, which is to the North of her house, 6 km away by an auto. After the shopping she decides to visit her friend Trishu, hence turns to the right and reaches her friend’s house which is 8 km away. From there she visits a shop which is 6 km away, taking a right turn. Finally, she turns to the right and phones up to the house to send the car. In what direction should the driver take the car to pick up Mini to bring her back? A. C. 6. How many odd numbers are there in the following series which are immediately followed by an odd number? 51473985726315863852243496 A. 1 B. 2 C. 4 D. More than 4 7. ? A. C. West South B. D. East North 5. Three of the following four are alike and hence form a group. Which one does not belong to that group? NSWX HMQR B. D. KPSU EJNO Two positions of a dice are shown below. When there are two dots at the bottom, the number of dots at the top will be _______. A. 3 B. 5 C. 6 D. Cannot be determined 8. Which of the following Venn diagrams best depicts the relationship amongst, ‘Singers, Dancers, Actors’ ? A. C. 9. A square transparent sheet with a pattern is given. Find the option as to how the pattern would appear when the transparent sheet is folded along the dotted line. A. B. C. D.  2 B. D. 10. Six friends – Mohit, Arun, Amit, Samrath, Aman and Siddharth are studying six different specialisations which are – metallurgy, telecommunication, humanities, mechanical, electrical and electronics not necessarily in the same order. Each one likes a different sport which are hockey, cricket, swimming, football, badminton and tennis again not in the same order. Samrath is not studying electronics. Aman is studying humanities and likes hockey. Amit likes swimming and is not studying electronics. The one who likes football is studying electrical. Siddharth is studying mechanical and does not like tennis. The one who likes badminton is studying telecommunication. Mohit and Arun do not like badminton. Mohit does not like tennis. Which sport does Mohit like? A. C. Football Hockey B. D. Cricket None of these | 19th NSO | Class-8 | Set-B | Level 1 SCIENCE 11. The speed-time graphs of motion of two bicycles X and Y are shown here. If at t = 0 s, both X and Y are at same position, then at what time will they be at same position again? –1 A. 2 s B. C. D. 2.5 s 5 s After 6 s Speed (m s ) 10 8 6 4 2 X Y 0 1 2 3 4 5 6 Time(s) 12. A solid object moving through a fluid experiences a frictional force exerted by the fluid. At a particular instant the frictional force exerted by the fluid does not depend on A. B. C. D. Shape of the object Speed of the object Nature of the fluid Volume of the fluid. 13. The given figure shows a statue. It exerts a pressure of 340 Pa on the floor. What is the weight of the statue if base area of its one foot is 17 cm2 ? A. C. 5.780 N 1.156 N B. D. 1000 N 2000 N 14. While trying to put out a fire in an electric appliance, we should pour______ on it. A. C. Distilled water Rain water B. D. Tap water Salt water water before and after heating. Which of the following correctly describes the temperature recorded by the thermometer as compared to the actual temperatures of the water before and after heating, and the temperature difference recorded by the thermometer and the actual temperature difference? Reading Reading Temperature before after difference heating heating A. Lower Lower Low B. Lower Higher High C. Lower Lower Same D. Higher Higher Same 18. Read the given statements and select the correct option. Statement 1 : It is difficult to drive a vehicle at high speed on a rainy day. Statement 2 : Friction depends on the nature of surfaces in contact. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true but statement 2 is false. D. Both statements 1 and 2 are false. 19. The diagram shows a converging lens producing an upright and virtual image. 15. Which of the following statements is incorrect about constellation? A. It is a group of stars that has recognisable shape. B. It appears to move in the sky from east to west. C. It consists of large number of stars but we are able to see only the bright ones. D. All the stars of a constellation are at the same distance from us. 16. Which of the following statements about conduction are true? (i) Conduction can transfer heat faster in denser medium. (ii) Conduction can transfer heat faster through good electrical conductors. (iii) C o n d u c t i o n c a n n o t h a p p e n a l o n g w i t h convection. A. (i) and (ii) only B. (i) and (iii) only C. (ii) and (iii) only D. (i), (ii) and (iii) 17. A student is given a thermometer that reads –1°C for the lower fixed point and 99°C for the upper fixed point. He uses the thermometer to measure the temperature of some 19th NSO | Class-8 | Set-B | Level 1 | Which of the following optical instruments uses this arrangement? Image A. A camera B. A magnifying glass C. A photographic enlarger D. A projector Object Lens 20. Meera’s father was born on February 2, 1977. How many complete turns has he gone round the sun till October 20, 2016? A. C. 28 40 B. D. 39 77 21. Match the column I with column II and select the correct option. P. Q. R. S. A. B. C. D. Column I Convex mirror 1. Convex lens 2. Concave lens 3. Concave mirror 4. P–2, Q–3, R–4, S–1 P–2, Q–4, R–1, S–3 P–1, Q–4, R–3, S–2 P–3, Q–1, R–4, S–2 Column II Peep-hole in the door Shop security mirror Reflector of torch Magnifying glass 3 22. Rearranging charges in uncharged metal object without contact with charged object is called A. C. Conduction Insulation B. D. Discharge Induction. 23. Two plane mirrors AB and CD are placed at right angle to one another. A ray of light PQ hits AB at Q making an angle of 45° as shown in the diagram. This ray will be reflected from mirror CD at an angle of D A. B. C. D. A 20° 35° 45° 60°. 45° Plane mirror P Q 90° C B Plane mirror 24. The given figure shows a circuit which contains three identical bulbs B1, B2 , B3 and four switches S1, S 2 , S 3 and S 4. B1 S1 B2 S3 B3 S2 27. Sohail conducted an experiment by taking a candle and a steel spoon. He put the spoon in the middle of the yellow part of the candle flame for a few seconds. He observed black deposition on the spoon. What can be concluded from this experiment? A. B. C. D. 28. Study the given table carefully and choose the incorrect match. S4 S. Object/ No. material I. Iron nail Which of the following combinations of switch positions will make all the three bulbs to glow? A. B. C. D. S1 Closed Closed Open Closed S2 Open Closed Closed Open S3 Closed Open Closed Closed S4 Open Closed Closed Closed 25. It is known that normally at 90 dB, it takes about 8 hours for the damage to receptor nerves of ear to occur. Further, it is found that if the sound level is increased by 5 dB, the safe exposure limit is cut to half. Based on the information, what is the non-stop exposure time for a 105 dB sound to damage the ear? A. C. 1 h 4 h B. D. 2h 5h 26. Three colourless liquids I, II and III are tested with red and blue litmus papers with the following results: Paper I Red litmus Stays red Blue litmus Turns red II Stays red Stays blue III Turns blue Stays blue Which of the following is the correct identification of I, II and III? A. I is lime water, II is common salt solution and III is hydrochloric acid. B. I is amla juice, II is lemon juice and III is caustic soda solution. C. I is vinegar, II is sugar solution and III is baking soda solution. D. I is window cleaner, II is milk of magnesia and III is soap solution. 4 Wax is an inflammable substance hence, it burns with a smoky flame. Unburnt carbon particles produce smoke (soot) which gets deposited on the spoon. Yellow region of the flame is the hottest hence, it produces smoke. Out of three colours (blue, black and yellow) of the flame, black being the darkest gets deposited on the spoon. Malleability Conductor of electricity         II. Coal piece III. Aluminium block IV. Pencil lead A. C. I and II only I, III and IV only B. D. II and III only All of these 29. Some materials are listed as : (a) Cotton (b) Dacron (c) Bakelite (d) Jute (e) Terylene (f) Melamine They are classified as (i) Biodegradable (ii) Manufactured from petroleum products (iii) Thermosetting plastics Choose the correct match. A. (i) – c, d; (ii) – a, e; (iii) – b, f B. (i) – d, f; (ii) – a, c; (iii) – b, e C. (i) – a, d; (ii) – b, c; (iii) – e, f D. (i) – a, d; (ii) – b, e; (iii) – c, f 30. In a biogas plant, anaerobic bacteria digest animal waste and produce biogas (Process I) which is burnt as household fuel (Process II). In the given Venn diagram, processes I and II are best described by point(s) Physical change A. C. 1 3 1 2 3 Chemical change B. 2 D. 1 and 3 respectively. | 19th NSO | Class-8 | Set-B | Level 1 31. A brief description of four substances is given as: W : Obtained from natural gas and is used in the production of urea. X : Contains mainly carbon and is obtained by carbonisation of dead vegetation. Y : A petroleum product used for road surfacing. Z : Used as a fuel for jet aircrafts. W, X, Y and Z are respectively A. CNG, coke, coal tar and diesel B. Hydrogen, coal, bitumen and kerosene C. Coal gas, coke, coal tar and kerosene D. Hydrogen, coke, bitumen and diesel. 35. Given figure represents a breathing process. 32. Observe the given flowchart and mark the appropriate option correctly representing I, II and III. Substances 36. Refer to the given dichotomous key and select the correct option regarding P, Q, R, S and T. I. (a) It is a method of asexual reproduction in plants. - Go to II (b) It is a method of asexual reproduction in animals. - Go to IV II. (a) Vegetative propagation by leaves – P (b) Vegetative propagation by stems – Go to III III. (a) Vegetative propagation by rhizomes – Q (b) Vegetative propagation by bulbs – R (I) in taste. A. B. C. D. Bitter in taste. (III) neutralises the Wasp stings effect of wasp sting. are (II). I II III Sweet Neutral Baking soda Sour Acidic Calamine Sour Alkaline Vinegar Sweet Alkaline Calamine en yg Ox n itio ign ain e) att tur (to era at emp t He 33. Fire triangle is represented as shown in the figure: Eliminating one or more of the three factors helps in fighting fire. Water, which is the most common fire extinguishing agent works by Combustible substance A. Raising the ignition temperature of the substance B. Removing the combustible substance C. Removing heat and oxygen D. Supplying CO2 which covers the fire like a blanket. 34. The given figures show two kinds of fruits. During this process __________. A. Air from atmosphere rushes into the lungs B. Volume of thoracic cavity and lungs decreases C. The air pressure inside the lungs decreases D. Both A and B IV. (a) Reproduction through binary fission – S (b) Reproduction through budding – T A. B. C. D. P – Potato, Q – Turmeric, R – Spirog yra, S – Plasmodium, T – Hydra P – Br yophyllum, Q – Ginger, R – Onion, S – Amoeba, T – Hydra P – Colocasia, Q – Mint, R – Potato, S – Paramecium, T – Sponge P – Strawberry, Q – Chlamydomonas, R – Onion, S – Paramecium, T – Yeast 37. A factory is built beside a river. Water used to cool the machines as well as some factory waste containing mercury are discharged into the river as shown in the given diagram. Factory X Y How are X and Y adapted for their dispersal in the surroundings? X Y A. Fleshy and sweet Hair-like structure to stick to attract animals onto bodies of animals B. Wing-like structure Hook-like structure to stick to enable to float onto fur of animals on water C. Air trapped within Hair-like structure to enable its structure to enable to float on water to float on water D. Wing-like structure Hair-like structure to get to get blown off with blown off with the wind the wind 19th NSO | Class-8 | Set-B | Level 1 | Z Water used to cool the machines W X Y River Factory waste Which of the following statements are correct regarding this? A. The quantity of fish in area W is the highest as compared to those in areas X, Y and Z. B. The fish present in area Z are not consumable as they are likely to contain poisonous mercury. C. Areas X and Y are directly affected by pollution so the chances of getting fish in this area are negligible. D. All of these 5 38. Anita bought a bunch of blue flowers with intact stems from the market. In order to find out whether the colour was artificially introduced or not, she prepared a section of the stem and observed it under the microscope. Which of the following correctly shows the condition of the section, if the colour was artificially introduced in flowers. (The dark area is the place where the colour is present). (iii) Testes are S sex organs of males which lie within T . (iv) The clone sheep U was developed by using cells from V and Scottish Blackface sheep. A. Q - Oviparous, S - Secondary, U - Rosie B. P - Metamorphosis, R - Viviparous, V - Finn Dorset C. Q - Viviparous, T - Seminal vesicle, U - Dolly D. R - Oviparous, S - Accessory, T - Scrotum 42. Refer to the given flow chart. A. B. Microorganism Yes Cell wall is present C. Yes D. 39. Read the given paragraph. Organism X has leathery lips and a big hump, organism Y has thick layer of fur on skin and thick layer of subcutaneous fat whereas organism Z is brilliantly coloured and has sticky pads on its feet. Which of the following holds true for organisms X, Y and Z ? A. Organism X lives in a place inhabited by xerophytic plants. B. Organism Y hibernates in extreme winters. C. Organism Z creates ghost images and uses startling colouration to elude its predators. D. All of these 40. Refer to the given figure of a plant cell and select the correct statement regarding organelles P and Q. Organised nucleus is present No P Chlorophyll is present No Q Yes R Yes Identify organisms P, Q and R and select the correct option regarding them. A. P could be a multicellular microbe which causes tetanus in humans. B. Q is always unicellular and could be saprophytic or parasitic. C. R could be a unicellular biflagellate microorganism which forms an important component of phytoplanktons. D. P can reproduce only inside cells of host organisms and behaves as non-living entity outside the living systems. 43. Refer to the given Venn diagram. Area meant Area meant for protection X for protection of ora of fauna Y Area where limited human economic activities allowed A. B. C. D. P synthesises energy but Q synthesises lipids. Presence of both P and Q in a plant cell maximise the rate of photosynthesis. P takes part in photosynthesis whereas Q takes part in protein synthesis. Amount of P and Q remains fixed in all cell types. 41. Read the following statements with few blanks and select the option that correctly fills any three of these blanks. (i) P is the transformation of a larval form into an adult animal. (ii) Egg laying animals are called Q whereas animals which give birth to babies are known as R . 6 Identify X and Y and select the correct option regarding them. A. X is an in situ method of biodiversity conservation whereas Y is an ex situ method of biodiversity conservation. B. Human activities are allowed only in the core zone of Y however the buffer zone remains undisturbed. C. X is an area that is owned and protected by a national government for the purpose of recreation and development. D. Hunting of animals is allowed in core zone of Y however, it is prohibited in all parts of X. | 19th NSO | Class-8 | Set-B | Level 1 44. Read the given statements and select the correct option. Statement 1 : A plant or animal species which is exclusively found in a particular area and is not found naturally anywhere else, is known as endemic species. Statement 2 : The existence of endemic species is often threatened due to the introduction of exotic species from some other geographical area. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true but statement 2 is false. D. Both statements 1 and 2 are false. 45. Refer to the given nitrogen cycle occurring in nature and select the correct option. A. B. C. D. Parasitic bacteria and fungi play an important role in process II. If process I does not take place then there will be no recycling of nutrients. Nitrogen fixation by free living and symbiotic bacteria and lightning process both could be process III. Both B and C Achievers Section Direction : Refer to the given passage and answer questions 46 and 47. The given figure shows two men M and N, facing two flat and hard walls, wall 1 and wall 2. Wall 2 y Which of the following statements is correct? A. B. C. D. Wall 1 500 m 2400 m N M Man N fires a gun, man M hears two echoes, one from wall 1 and second from wall 2. The speed of sound in air is given to be 325 m s–1. 46. After the firing of a gun by the man N, the man M will hear the first echo in A. 4.0 s B. 8.9 s C. 8.0 s D. 10.5 s. 47. If the time difference between the two echoes as heard by man M is 1.23 s, then distance between the walls, y is A. 400 m B. 900 m C. 500 m D. 1300 m. 48. Ms Nisha, a science teacher set up the given apparatus to demonstrate displacement reactions : CuSO4 solution Fe filings (I) ZnSO4 solution Fe filings (II) FeSO4 solution Cu turnings 19th NSO | Class-8 | Set-B | Level 1 | (III) CuSO4 solution Zn granules (IV) Copper will be precipitated in beaker I and there will be no change in beakers, II, III and IV. Copper will be precipitated in beaker IV and solutions in beakers I, II and III will become colourless. There will be no change in beakers II and III and solutions in beakers I and IV will turn green and colourless respectively. There will be no change in beakers II and III and solutions in beakers I and IV will become colourless and green respectively. 49. Read the given paragraph where few words have been italicised. Monoculture is growing of a single crop in one habitat. It makes mechanical harvesting easy and reduces pest infestation. But, it removes some nutrients specifically from the area. Hence, crop rotation is more prevalent wherein leguminous and non-leguminous crops are grown simultaneously on the same field. It replenishes the soil with magnesium and improves soil fertility. It also increases pest infestation. Select the correct statement regarding this. A. B. C. D. Monoculture should be replaced with tissue culture. Easy should not be replaced as it is correctly mentioned while magnesium should be replaced with boron. Simultaneously should be replaced with alternately. Reduces and increases should not be replaced or interchanged as they are correctly mentioned. 7 50. The graph given below shows the changes in the blood glucose concentrations of a healthy person and a person with condition X. Blood glucose level (mg/dL) Person with condition X Healthy person Refer to the given graph and select the incorrect statement regarding it. A. B. C. D. Time after meal (min) Person with condition X needs to take insulin injections before meals. Urine of person with condition X contains some amount of glucose. Condition X arises due to malfunctioning of few cells of pancreas. Condition X is the consequence of deficiency of iodine in body. SPACE FOR ROUGH WORK 8 | 19th NSO | Class-8 | Set-B | Level 1 Answer Keys 15th nso SET A 1. (B) 2. (D) 3. (C) 4. (B) 5. (D) 6. (C) 7. (C) 8. (C) 9. (C) 10. (A) 11. (A) 12. (C) 13. (B) 14. (D) 15. (A) 16. (C) 17. (D) 18. (B) 19. (C) 20. (A) 21. (C) 22. (C) 23. (A) 24. (B) 25. (D) 26. (D) 27. (D) 28. (D) 29. (C) 30. (A) 31. (A) 32. (A) 33. (D) 34. (B) 35. (B) 36. (B) 37. (C) 38. (B) 39. (B) 40. (C) 41. (D) 42. (B) 43. (B) 44. (B) 45. (D) 46. (B) 47. (D) 48. (D) 49. (C) 50. (A) SET B 1. (B) 2. (B) 3. (B) 4. (B) 5. (A) 6. (B) 7. (C) 8. (D) 9. (B) 10. (B) 11. (A) 12. (B) 13. (A) 14. (B) 15. (C) 16. (D) 17. (A) 18. (A) 19. (B) 20. (A) 21. (C) 22. (A) 23. (D) 24. (A) 25. (D) 26. (C) 27. (A) 28. (D) 29. (A) 30. (C) 31. (A) 32. (B) 33. (D) 34. (B) 35. (C) 36. (B) 37. (D) 38. (B) 39. (B) 40. (B) 41. (A) 42. (D) 43. (B) 44. (A) 45. (C) 46. (C) 47. (C) 48. (A) 49. (D) 50. (C) 16th nso SET A 1. (D) 2. (D) 3. (B) 4. (B) 5. (D) 6. (C) 7. (D) 8. (D) 9. (C) 10. (D) 11. (D) 12. (B) 13. (D) 14. (B) 15. (D) 16. (D) 17. (A) 18. (B) 19. (A) 20. (C) 21. (D) 22. (B) 23. (B) 24. (C) 25. (A) 26. (C) 27. (A) 28. (D) 29. (D) 30. (C) 31. (B) 32. (A) 33. (D) 34. (B) 35. (B) 36. (B) 37. (C) 38. (B) 39. (D) 40. (C) 41. (D) 42. (B) 43. (D) 44. (D) 45. (B) 46. (A) 47. (D) 48. (D) 49. (B) 50. (C) SET B 1. (D) 2. (D) 3. (C) 4. (D) 5. (B) 6. (D) 7. (A) 8. (B) 9. (D) 10. (D) 11. (A) 12. (D) 13. (A) 14. (B) 15. (C) 16. (B) 17. (B) 18. (B) 19. (A) 20. (B) 21. (D) 22. (A) 23. (B) 24. (B) 25. (A) 26. (C) 27. (B) 28. (C) 29. (B) 30. (D) 31. (B) 32. (C) 33. (B) 34. (A) 35. (D) 36. (B) 37. (C) 38. (C) 39. (A) 40. (B) 41. (C) 42. (D) 43. (D) 44. (D) 45. (D) 46. (C) 47. (B) 48. (A) 49. (B) 50. (D) 17th nso SET A 1. (D) 2. (A) 3. (A) 4. (B) 5. (B) 6. (B) 7. (D) 8. (B) 9. (D) 10. (B) 11. (B) 12. (D) 13. (D) 14. (D) 15. (C) 16. (B) 17. (B) 18. (A) 19. (C) 20. (B) 21. (C) 22. (D) 23. (A) 24. (C) 25. (D) 26. (A) 27. (D) 28. (A) 29. (B) 30. (A) 31. (C) 32. (B) 33. (B) 34. (A) 35. (C) 36. (C) 37. (D) 38. (D) 39. (A) 40. (B) 41. (D) 42. (B) 43. (A, B) 44. (D) 45. (D) 46. (D) 47. (D) 48. (C) 49. (D) 50. (D) SET B 1. (A) 2. (D) 3. (B) 4. (B) 5. (D) 6. (D) 7. (C) 8. (D) 9. (C) 10. (C) 11. (D) 12. (A) 13. (A) 14. (C) 15. (C) 16. (B) 17. (B) 18. (B) 19. (D) 20. (A) 21. (C) 22. (B) 23. (B) 24. (B) 25. (A) 26. (C) 27. (B) 28. (A) 29. (B) 30. (C) 31. (D) 32. (C) 33. (C) 34. (D) 35. (A) 36. (A) 37. (A) 38. (D) 39. (A) 40. (D) 41. (B) 42. (B) 43. (D) 44. (C) 45. (B) 46. (C) 47. (D) 48. (D) 49. (B) 50. (B) 7. (B) 17. (D) 27. (D) 37. (D) 47. (C) 8. (D) 18. (B) 28. (D) 38. (A) 48. (A) 9. 19. 29. 39. 49. 10. 20. 30. 40. 50. 18th nso 1. (B) 11. (D) 21. (D) 31. (C) 41. (D) 2. (C) 12. (C) 22. (A) 32. (C) 42. (C) 3. (C) 13. (D) 23. (B) 33. (D) 43. (D) 4. (C) 14. (A) 24. (B) 34. (B) 44. (D) SET 1 5. (D) 6. (A) 15. (D) 16. (B) 25. (D) 26. (A) 35. (D) 36. (D) 45. (D) 46. (B) (C) (C) (A) (C) (D) (A) (A) (B) (D) (C) SET 2 2. (C) 3. (B) 4. (B) 5. (A) 6. (D) 1. (D) 11. (C) 12. (D) 13. (B) 14. (C) 15. (D) 16. (C) 21. (B) 22. (B) 23. (C) 24. (B) 25. (A) 26. (A) 31. (C) 32. (A) 33. (B) 34. (D) 35. (C) 36. (B) 41. (A) 42. (D) 43. (C) 44. (B) 45. (C) 46. (B) 7. (B) 17. (B) 27. (C) 37. (D) 47. (C) 8. (A) 18. (D) 28. (D) 38. (B) 48. (B) 9. 19. 29. 39. 49. (C) (C) (C) (B) (D) 10. 20. 30. 40. 50. (C) (D) (B) (A) (B) SET A 1. (B) 2. (B) 3. (C) 4. (D) 5. (D) 6. (C) 11. (D) 12. (A) 13. (A) 14. (D) 15. (C) 16. (C) 21. (C) 22. (A) 23. (B) 24. (A) 25. (B) 26. (C) 31. (C) 32. (D) 33. (D) 34. (D) 35. (A) 36. (B) 41. (C) 42. (D) 43. (D) 44. (B) 45. (A) 46. (A) 7. (B) 17. (C) 27. (C) 37. (C) 47. (C) 8. (A) 18. (A) 28. (B) 38. (A) 48. (D) 9. 19. 29. 39. 49. (C) (C) (C) (B) (C) 10. 20. 30. 40. 50. (C) (C) (D) (C) (B) SET B 1. (C) 2. (B) 3. (D) 4. (B) 5. (B) 6. (D) 11. (C) 12. (D) 13. (C) 14. (A) 15. (D) 16. (A) 21. (B) 22. (D) 23. (C) 24. (D) 25. (A) 26. (C) 31. (B) 32. (C) 33. (C) 34. (D) 35. (B) 36. (B) 41. (B) 42. (C) 43. (C) 44. (B) 45. (D) 46. (C) 7. (A) 17. (C) 27. (B) 37. (D) 47. (A) 8. (A) 18. (B) 28. (A) 38. (B) 48. (C) 9. 19. 29. 39. 49. (D) (B) (D) (D) (C) 10. 20. 30. 40. 50. (A) (B) (C) (C) (D) 19th nso