LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – CHEMISTRY
FOURTH SEMESTER – APRIL 2011
CH 4955 – ORGANIC CHEMICAL TECHNOLOGY
Date : 09-04-2011 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART-A
Answer ALL questions. (10 ´ 2 = 20 marks)
- Give the correlation between different temperature units.
- Define the term velocity gradient.
- Mention the advantages of inclined monometer over monometer.
- Define the following.
- a) extraction battery b) diffusion battery
- Compare the characteristics of distillation and extraction processes.
- How is the formation of nitronium ion from nitration mixture detected and confirmed?
- How is the DVS ratio of a mixed acid calculated?
- Why chlorination reaction is more important for industry?
- How are temperature controlled reactions performed industrially?
- How is spent acid from nitration reaction recycled?
PART-B
Answer any EIGHT questions. (8 ´ 5 = 40 marks)
- What are the standards of five basic SI units for mass, length, time, temperature, and mole?
- What are Newtonian and non-Newtonian fluids?
- Explain the working principle of centrifugal decanter for immiscible liquids.
- Derive an expression for the barometric equation.
- Explain the material balances in plate column with reference to two-component systems.
- Explain the working principle of moving-bed leaching machine.
- Classify various chemical reactors and give a brief account on each.
- Write detailed notes on complex series reactions.
- Draw Hough nitrator and explain the method of preparation of mononitrobenzene.
- Explain in detail the types of oxidizing agents used for industrial preparations.
- How various types of reactors built for halogenation reactions? Explain.
- Explain the preparation of a dye industrially?
PART-C
Answer any FOUR questions. (4 ´ 10 = 40 marks)
- Discuss the energy for single-stream process.
- a) Define the following
(i) Murphree efficiency (ii) Shank process - b) Explain the factors influencing plate efficiency.
- a) Explain the method of leaching by percolation through stationary solid beds.
- b) Write short notes on different types of impellers.
- a) Compare batch reactor and longitudinal flow reactor for their performance and types of reactions.
- b) What is back mixing? Explain the effect of back mixing in consecutive reactions.
- a) What are different types of nitrating agents? Explain the mechanism of each reaction.
- b) List out various workup procedures to isolate sulphonated products. Explain each one in detail.
- With a complete flow chart, explain the industrial preparation of penicillin.
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