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The major constituent of butyl rubber is ____________

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The major constituent of butyl rubber is ____________

(a) Isobutylene

(b) Isoprene

(c) Chloroprene

(d) Acrylonitrile

This question was addressed to me during an online interview.

The question is from Elastomers in section Polymers of Engineering Chemistry I

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The correct option is (a) Isobutylene

For explanation: In butyl rubber, isobutylene constitutes (95-99) % and isoprene constitutes (1-5) %.

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