Semester Exam - Set 3

5HA - Organic Chemical Technology - October 1999

Part A (20 x 2 = 40 Marks)

1. Give two examples of unit operations. Also give the schematic representations
2. What is the significance of beating in the manufacture of pulp?
3. Outline the steps involved in the manufacture of starch
4. Write any two industrial applications of sugar
5. Give examples of antibiotics. Also write its uses
6. Explain the term Hydrogenation with reference to oil and fat industry
7. Explain the term �bio-degradability� with reference to detergents
8. Write briefly about fatty acids
9. Give examples of byproducts from natural gasoline. Also indicate its uses
10. Write about petrochemical precursors
11. Outline the method of production of synthesis gas
12. What is bagasse? What are its uses?
13. What are the industrial applications of Xylene?
14. Compare and contrast thermoplastic and thermosetting resins
15. Outline the application of polymers in engineering plastics
16. What is meant by catalytic cracking?
17. Write examples of synthetic fibers
18. Briefly write about tanning processes commonly used in leather industry
19. Write about epoxy resins
20. Give examples of dye-intermediates. Also write its uses

Part B (5 x 12 = 60 Marks)

21. (a) With a neat sheet, describe the various stages involved in the manufacture of paper

Or

(b) Describe in detail the various gasification processes of coal with a neat diagram

22. (a) With the help of a neat flow chart, describe the manufacture of ethyl alcohol by fermentation process

Or

(b) (i) Explain the manufacture of detergents (7)

(ii) Explain the process used for refining of edible oils (5)

23. (a) (i) Discuss the different products obtained from the refining of petroleum at various stages (9)

(ii) Also give their commercial applications (3)

Or

(b) (i) Describe the manufacture of butadiene (8)

(ii) Write important uses of Xylene (4)

24. (a) Describe the various stages involved in the production of polypropylene. Also give block diagram

Or

(b) (i) Briefly discuss about epoxy resins (7)

(ii) Outline the classification of plastics (5)

25. (a) Describe the various stages involved in the manufacture of Rayon fiber by viscose process

Or

(b) (i) Briefly write about the preparation of synthetic rubber (8)

(ii) Outline the classification of synthetic fibers (4)