Download SGBAU BSc 2019 Summer 5th Sem Petrochemical Science Question Paper

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B.Sc. (Part—III) Semester—V Examination

5S : PETROCHEMICAL SCIENCE

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Time : Three Hours] [Maximum Marks : 80

Note :—(1) Question No. 1 is compulsory and carries 8 marks.

(2) The remaining SIX questions carry 12 marks each.

(3) Draw a diagram and chemical equation wherever necessary.

1. (a) Fill in the blanks :
   1. The molecular weight of large polymer depends on their number of present in that polymer.

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   2. Diene polymer comprisely known as
   3. enhance the crystalisability of wax without dissolving oil.
   4. The chain of consist of only one type of monomer units.
   2
2. (b) Choose correct alternatives :
   1. Polyisoprene is well known ~ polymer.
      1. (a) Plastics

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      2. (b) Rubber
      3. (c) Fiber
      4. (d) All above
   2. In suspension polymerization process _ play an important role for removal of heat.
      1. (a) Air

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      2. (b) Salt
      3. (c) Water
      4. (d) Caustic
   3. High pressure polyethylene manufacturing process was developed by
      1. (a) ICI

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      2. (b) TCS
      3. (c) MDCC
      4. (d) UDP
   4. Polyvinyl acetate is mainly used in ____
      1. (a) Cement

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      2. (b) Paint
      3. (c) Bitumen
      4. (d) None of these
   2

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3. (c) Answer in one sentence each :
   1. Which are three distinct stages of chain polymerization ?
   2. Which two steps are involved in production of diisobutylene ?
   3. What is Polymides ?
   4. What is the major drawback of polystyrene polymer ?
   4

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4. (A) Describe free radical chain polymerization with example. 6
5. (B) Classify the polymers with the structure. 6

   OR

6. (P) Describe mess polymerization.
7. (Q) What is Polymer ? Explain with type, monomers used and also explain degree of polymerization. 6

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8. (A) How polypropylene are formed describe all steps involved in polymerization of polypropylene and also give the uses of polypropylene. 6
9. (B) Describe year-wise history of polyethylene production with respect to catalyst and process parameters involved. 6

   OR

10. (P) Ethylene-propylene copolymers are formed in various mole range. How they are formed ? Describe with respect to process parameters. 6
11. (Q) Describe Phillips medium pressure process for production of polyethylene with respect to process parameters and their uses. 6

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12. (A) Describe dimerization of isobutylene with respect to their chemistry and process parameter in detail. 6
13. (B) Describe Goodyear 3D process for production of isoprene monomer in detail. 6

    OR

14. (P) How styrene-butadiene block copolymers are prepared ? Describe in detail. 6
15. (Q) Describe production of polyisobutylene with respect to their chemistry and process parameters involved. 6

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16. (A) Which are the styrene polymers and copolymer ? How we will produce polystyrene ? Give the techniques extensively followed in industry. 6
17. (B) Vinyl chloride is a monomer of PVC. Describe PVC production with respect to physical properties of monomer and also give the uses of PVC. 6

    OR

18. (P) Describe the following with their market :
    1. Impact polystyrene 4
    2. Vinyl chloride — vinyl acetate copolymer 4

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    3. Polystyrene. 4
19. (A) What is Polyesters ? Describe saturated polyester with their chemistry and process parameters involved. 8
20. (B) Describe the chemistry and process parameters for production of nylon-6, 10. 4

    OR

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21. (P) Describe the production of phenolic thermosetting resin with their chemistry and process parameters 6
22. (Q) What is nylon ? Give their example and describe production of Nylon-6 6 with their chemistry and process parameters involved 6
23. (A) Describe both processes for manufacture of calcium grease. 6
24. (B) What is the principle involved in solvent dewaxing ? Describe Barisol process in detail. 6

    OR

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25. (P) Give the uses of following :
    1. Wax
    2. Bitumen.
26. (Q) What is bitumen ? Which tests and properties are prescribed for bitumen ? Discuss any one of them. 6

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