M.Sc Chemistry Organic Chemical Technology Question Paper 2007

 

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

LM 55

FOURTH SEMESTER – APRIL 2007

CH 4955 – ORGANIC CHEMICAL TECHNOLOGY

 

Date & Time: 23/04/2007 / 9:00 – 12:00   Dept. No.                                           Max. : 100 Marks

 

 

 

PART-A

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

1. How is the formation of nitronium ion from nitration mixture detected and confirmed?
2. How is the DVS ratio of a mixed acid calculated?
3. Name some of the industrial oxidation reactions with examples.
4. How are temperature controlled reactions performed industrially?
5. How is spent acid from nitration reaction recycled?
6. Define the following
7. a) potential flow b) flash distillation
8. What is boiling point diagram?
9. Draw equilibrium diagram for C₆H₆-EtOH binary system.
10. What is glycerin distillation and glycerin vaporization?
11. What is roughness factor?

 

 

PART-B

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

11. Classify various chemical reactors and give a brief account on each.
12. Write detailed notes on complex series reactions.
13. Draw Hough nitrator and explain the method of preparation of mononitrobenzene from it.
14. Give a detailed account on the design and material of reactors used for sulphonation.
15. How various types of reactors built for halogenation reactions? Explain.
16. Explain the preparation of a dye industrially?
17. How will you calculate the vapour composition of a mixture in the distillation process using Raoult’s law?
18. Discuss about the Hydrostatic equilibrium in a centrifugal field.
19. Explain the working principle of centrifugal decanter for immiscible liquids.
20. What are Newtonian and non-Newtonian fluids?
21. What is Reynolds’s number? How the types flow is observed in Reynolds’s experiment?
22. What is the pump work in Bernoulli’s equation?

 

 

 

 

PART-C

 

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

 

23     a) Compare batch reactor and longitudinal flow reactor for their performance and types of reactions.

1. b) What is back mixing? Explain the effect of back mixing in consecutive reactions.

24     a) What are different types of nitrating agents? Explain the mechanism of each reaction.

1. b) List out various workup procedures to isolate sulphonated products. Explain each one in detail.
2. With a complete flow chart, explain the industrial preparation of penicillin.
3. Explain about the total energy of steady flow process.
4. Write note on types of impellers.
5. Discuss the mechanical-energy balance in potential flow.

 

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