Quality Control Answer Key Pink Pacop

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  Quality Control and Quality Assurance Questions [PINK PACOP] Page 1  of 40   1. Other name of Ferric ammonium sulfate a. Ferric alum b. Fe NH 4  (SO 4 ) 2  c. Fe (NH 4 ) 2 (SO 4 ) 2  d. A and B e. A and C 2. The following is/are example/s of metal-ion indicators. I. Murexide II. Calmagite III. Pyrocathecol violet IV. Ferric alum a. I only b. I and II only c. I, II, and III d. I, II, III and IV3. Assay of diluted HCl is expressed in: a. % w/w b. % w/v c. Both a and b d. None of the choices 4. Standard solution in precipitation method od analysis a. Disodium edetate b. Silver nitrate c. Sodium Methoxide d. Perchloric acid 5. Use to prevent one element from interfering in the analysis of another element a. Masking agent b. Demasking agent c. Both a and b d. None of the choices 6. Argentometric titration is titration with ______ ion. a. Magnesium b. Sodium c. Silver d. Potassium 7. Fajans titration uses ____ indicator. a. Acid-base b. Adsorption c. Metal-ion d. None of the choices 8. Reasons why residual titration are performed. a. Reaction proceeds slowly b. Poor solubility of the sample c. Sample does not give sharp end point d. All of the choices  Quality Control and Quality Assurance Questions [PINK PACOP] Page 2  of 40   9. Solutions containing all the reagents and solvents used in the analysis, but no deliberately added analyte. a. Blank solution b. Solution with sample c. Standard solution d. Test solution 10. Describes how close a measured value is to the true value. a. Accuracy b. Precision c. Range d. Standard deviation 11. Primary standard in the standardization of perchloric acid a. Potassium hydrogen phthalate b. Calcium carbonate c. Benzoic acid d. Sodium carbonate 12. Primary standard in the standardization of sodium methoxide. a. Benzoic acid b. Sodium bicarbonate c. Sodium carbonate d. Potassium hydrogen phthalate 13. The term dried to constant weight means that two consecutive weighing do not differ by more than: a. 0.0002 g b. 0.2 mg c. 0.5 mg/g d. All of the choices e. C only 14. Other name of systematic error a. Determinate b. Indeterminate c. Random d. Both b and c 15. Ferric ammonium sulfate is used as indicator in the standardization of: a. Silver nitrate b. Ammonium thiocyanate c. Edetate disodium d. All of the choices 16. The end point of using number ferric ammonium sulfate is: a. White precipitate b. Red-brown color c. Pink color d. Blue color 17. Limit moisture in nonaqueous titrimetric analysis is less than:  Quality Control and Quality Assurance Questions [PINK PACOP] Page 3  of 40   a. 0.5 % b. 0.05 % c. 0.2 % d. 0.02 % 18. Complete reaction: H 2 C 4 H 4 O 6  + NaOH -   a. Na 2 C 4 H 4 O 6  b. H 2 O c. Both a and c d. None of the choices 19. A ligand that binds to a metal ion through only one atom. a. Monodentate b. Bidentate c. Tridentate d. Tetradentate20. Which of the following is added to maintain the pH of sodium thiosulfate in optimum range for the stability of the solution? a. Sodium bicarbonate b. Chloroform c. Thymol d. Sodium carbonate 21. Standard solution in non-aqueous titrimetric analysis-acidimetry a. perchloric acid b. hydrogen bromide c. both a and b d. none of the choices 22. Standards solutions are also known as: a. test solutions b. volumetric solutions c. saturated solution d. none of the choices 23. If starch is used as an indicator, the end point is/are: a. appearance of intense blue color b. disappearance of intense blue color c. both of the choices d. none of the choices 24. Types of chemical reaction used in the volumetric analysis a. redox b. neutralization c. diazotization d. all of the choices e. a and b only 25. Use of KI in the preparation of iodine solution. a. Solubilizing agent b. Change in pH of the solution  Quality Control and Quality Assurance Questions [PINK PACOP] Page 4  of 40   c. As preservative d. All of the choices 26. Other name of ferrous phenanthroline. a. eosin Y b. crystal violet c. ferroin d. ferric alum 27. Color of the complex resulting from reaction with ferrous phenanthroline: a. blue b. red c. pink d. violet 28. Primary standard in the standardization of ceric sulfate solution a. potassium hydrogen phthalate b. calciuim carbonate c. sodium bicarbonate d. arsenic trioxide 29. In the standardization of iodine solution, why is there a need to boil the solution of arsenic trioxide? a. it increases the solubility b. it makes the solution stable c. both a and c d. none of the choices 30. Indicator in iodometric method of analysis. a. KMnO 4  b. Methyl red TS c. Methyl orange TS d. Starch TS 31. A molecule which provides groups of attachment to metal ions. a. Ligand b. Chelate c. Both a and b d. None of the choices 32. HCl + Calcium carbonate will react to form a primary product known as: a. Carbonic acid b. Calcium hydroxide c. Both a and c d. None of the choices 33. The reaction between HCl and calcium carbonate can be seen in the standardization of: a. Silver nitrate b. Ammonium thiocyanate c. Edetate disodium d. Sulfuric acid 34. A substance which gains electrons in a redox reaction.