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C 20566 (Pages : 2) ಸ ರ ರರ ௧௨2௨ 2௧

SIXTH SEMESTER U.G. DEGREE EXAMINATION, MARCH 2022
(CBCSS—UG)
Polymer Chemistry
PCH 6B 01—POLYMER CHEMISTRY—I
(2019 Admissions)
Time : Two Hours Maximum : 60 Marks
Section A (Short Answers)

Answer at least eight questions.
Each question carries 3 marks.
All questions can be attended.

Overall Ceiling 24.

1. What is condensation polymerisation ? Give two examples.
2. What is degree of polymerisation ?
3. Give preparation and uses of PAN.
4. Differentiate isotactic and syndiotactic polymers.
5. What is the significance of poly dispersity index ?
6. Distinguish natural and synthetic polymers.
7. Whatis SBR ? Write its uses,
8. Write down the steps involved in free radical polymerisation.
9. Write down the synthesis and one use of poly urethane.
10. Whatis step growth polymerization ?
11. Give the preparation of urea formaldehyde resins.
12. Define viscosity average molecular mass.

(8 x 3 = 24 marks)

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