Q2/7G/11-14 Reg. No

St. Joseph’s College of Arts & Science (Autonomous) St. Joseph’s College Road, Cuddalore – 607001 ACH202 – INDUSTRIAL CHEMISTRY Time : 3 hrs Max . Marks : 75 SECTION – A (25X1=25) Answer ALL Questions I. Choose the correct answer 1. Urea is a a) Phosphates fertilizer c) Potash fertilizer

b) NPK fertilizer d) Nitrogen fertilizer

2. Solvent extraction is based on the principle of a) Raoult’s Law b) Nernst’s Distribution law c) Boyle’s Law d) None 3. Transmittance is b) I/ I0 a) I/T

c) I/T

4. Parathion is a) Organosulphur insecticide c) Organophosphorus insecticide

d) log I0/I

b) Organomerxuric insecticide d) None

5. Polymers with few degree of polymerization are known as a) Oligopolymers b) High polymers c) Biopolymers d) Low polymers 6. The mobile phase exits the column is termed as a) Solvent b) Eluent c) Eluate, d) All the above 7. Adsorption is generally not suitable for------ compounds. a) Polar b) Non polar c) Regular d) Irregular 1

Q2/7G/11-14 8. The absorption of light in the visible and near uv regions by a solution is governed by ---------- law. a) Boyle’s b) Charle’s c) Beer-Lambert d) Avogadro’s 9. The absorption bands shift towards longer wavelength if the temperature of the system -------a) Decreases b) Increases c) Becomes zero d) Becomes negative 10. ------- can be prepared by the reaction of methyl carbonyl chloride with two isopropoxy phenol a) DDT b) BHC c) Parathion d) Baygon II. Fill up the blanks 11. By boiling water _________ hardness can be removed. 12. Molar absortivity is__________ 13. Gypsum is ___________ 14. Weight average molecular weight (Mw) is given as________ 15. The cation- exchange resins possess__________ III. Match the following 16. Alumina

a) UV region

17. Hypochromic shift

b) Hydrated sodium aluminosilicate

18. Ammonium sulphate

c) Non-porus protective film

19. Zeolite

d) Adorbents

20. Passivation

e) Sindri fertilizer 2

Q2/7G/11-14 SECTION - B (10X2=20) Answer any TEN Questions 21. Define Chromatography. 22. Give the applications of colum chromatography. 23. Describe the principles of TLC. 24. Give the limitations of Beer-Lamberts law. 25. What is molar absorption coefficient? 26. What are secondary nutrients? Give examples. 27. How will you synthesise ammonium sulphate from gypsum? 28. Give the synthesis of parathion. 29. Give the units of hardness of water. 30. Write a note on co polymers. 31. What are the types of polymers? 32. Define Drug SECTION – C (5X7=35) Answer any FIVE Questions 33. a) What are the need for fertilizers? b) Give the action of ammonium sulphate as fertilizer. c) The BHC is commonly known as --------.

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(3) (3) (1)

Q2/7G/11-14 34. a) How will you synthesise BHC? b) What is Herbiicide? Classify it. c) HCN is an example for ------

(3) (3) (1)

35. a) Give the reactions for removal of permanent hardness. b) What are the main difficulties with choosing a drug?

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36. a) Explain number average molecular weight. b) What is degree of polymerization c) Write a note on step polymers.

(2.5) (2) (2.5)

37. a) Explain the principle ivolved in solvent extraction b) In what way TLC is superior to paper and column chromatography.

(3) (4)

38. a) Classify chromatography. b) Classify fertilizers c) What is selective herbicide?

(3) (3) (1)

39. a) Explain Beer- Lambert’s law. (3) b) In a Beer-Lambert cell, the aqueous solution of a substance of known concentration absorbs 10% of the incident light. What fraction of the incident light will be absorbed by the same solution in cell five times as long? (4)

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