11. Properties of a polymer is affected by the
12. Which of the following polymers has the tendency of decomposing before melting?
13. Thermal pyrolysis of ethylene dichloride produces
14. The monomer of poly vinyl chloride (PVC) is
15. Molecular weight of polymers are in the range of
16. Vulcanisation of rubber does not increase its
17. __________ fibres are made of polyamides.
18. Gutta parcha rubber is
19. Which of the following is an elastomer?
20. The repeating units of PTFE are
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