LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

WD 24

SIXTH SEMESTER – April 2009

CH 6611 / 6605 – INDUSTRIAL CHEMISTRY

 

 

 

Date & Time: 25/04/2009 / 9:00 – 12:00  Dept. No.                                                   Max. : 100 Marks

 

 

PART – A

Answer ALL questions:                                                                               (10 x 2 = 20)

 

1. Define calorific value of fuels.
2. Explain: Gobar electric cell.
3. How is 2, 4-D manufactured?
4. Give two examples for biofertilisers.
5. Define Break point chlorination.
6. Which dissolved salts contribute for permanent hardness?
7. What is acid rain? How is it caused?
8. Describe the toxicity of mercury.
9. What are the constituents of portland cement?
10. What is a luminous paint? Give an example.

PART – B

Answer any EIGHT questions:                                                                   (8 x 5 = 40)

 

11. Write a note on Producer gas.
12. How are coals classified? Give the composition of each type.
13. What is DDT? How is it manufactured? Indicate its uses.
14. Write a note on micronutrients and their role in the growth of plants.
15. How do you estimate calcium hardness in water by EDTA method?
16. How is water softened by zeolite process?
17. Explain the principle involved and application of reverse osmosis.
18. Describe how ozone depletion takes place in stratosphere.
19. Give an account of BOD determination in waste water.
20. What are the international standards for drinking water quality? How do they compare with ISI specifications?
21. Write a note on perfumes and flavouring agents.
22. Explain the functioning of molybdenum sulphide as a solid libricant.

PART – C

Answer any FOUR questions:                                                                     (4 x 10 = 40)

 

23. a) Describe the determination of calorific value of a fuel by Bomb calorimeter (6).
24. b) What are the uses of ETBE and MTBE (4).
25. a) How are (a) Super phosphate of lime (b) Triple superphosphate manufactured? Which is superior? Why?  (7)
26. b) What is BHC? How is it manufactured? (3)
27. a) Outline the process of refining of Petroleum (5)
28. b) How do you prepare Bordeaux mixture? What is its composition? Mention its use. (5)
29. a) How is total hardness of water estimated. (5)
30. b) How are suspended impurities and micro organism removed from water used for drinking purpose? (5)
31. a) Write a note on air pollution (5)
32. b) Explain the biochemical effects of nitrogen oxides (5)
33. a) What are abrasives? How are they classified? Give examples (5)
34. b) Write a note on pharmaceutical industries in India.

 

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