LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

WD 49

FOURTH SEMESTER – April 2009

CH 4955 – ORGANIC CHEMICAL TECHNOLOGY

 

 

 

Date & Time: 28/04/2009 / 9:00 – 12:00  Dept. No.                                                 Max. : 100 Marks

 

 

PART-A

Answer ALL questions.                                                                       (10 ´ 2 = 20 marks)

 

1. Define back mixing. What are its advantages and disadvantages?
2. Why sulphonated products are very much useful industrially? Give reasons with example.
3. What are the types of hydrogenating agents?
4. Compare batch and parallel reactors.
5. Narrate the preparation of titanium dioxide.
6. A simple U-tube manometer is filled with mercury (specific gravity = 13.6) and the liquid above the mercury level is carbon tetrachloride (specific gravity = 1.6). The manometer reads 8.30 in. What is the pressure difference over the manometer in inches of water?
7. What is Reynolds number? Give its significances.
8. What is velocity gradient in a laminar flow?
9. Define Couette flow.
10. What is theoretical or equilibrium diagram?

 

 

PART-B

Answer any EIGHT questions.                                                           (8 ´ 5 = 40 marks)

 

11. What are the physical factors that affect chemical process kinetics of chemical reactions? Write a short note on each.
12. How is nitration of 2-methylpentane carried out? What are the products formed? Write the mechanism of the reaction.
13. Explain in detail the workup procedure for sulphonation reaction and its products.
14. How are various types of chlorination reactions performed industrially?
15. What is the need for a research and development unit in industry? Discuss in detail.
16. With the flow diagram explain the manufacture of paint.
17. Describe the pump work in Bernoulli equation.

 

18. Write short notes on impellers.
19. Explain the working principle of bubble cap column with diagram.

 

 

 

20. Explain the following
21. a) energy balance over a flow system
22. b) effect of temperature upon heat of the reaction
23. Describe the various components involved in the fractionating column.
24. What is differential distillation and give its applications?

 

PART-C

Answer any FOUR questions.                                                            (4 ´ 10 = 40 marks)

 

23. a) Explain the effect of back-mixing on the product distribution and holding time in parallel and series reactions.
24. b) How are temperature controlled reactions performed industrially?
25. c) How is spent acid from nitration reaction recycled?
26. a) Explain the method of nitration of hydrocarbons using Schmid nitrator.
27. b) How is phenol manufactured industrially from cumene? Explain in detail.
28. a) Explain the industrial preparation of hydrogenation of vegetable oil.
29. b) What are the functions of quality control unit?
30. a) Derive Barometric equation.
31. b) Give the working principle of continuous gravity decanter.
32. a) Explain the terms Newtonian and non-Newtonian flow.
33. b) Write note on the mechanical energy balance in potential flow.
34. How will you calculate the vapour composition of a mixture using Raoult’s law?

 

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