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Which of the following contains isoprene units? 

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Which of the following contains isoprene units? 

(a) Natural rubber 

(b) Nylon-66 

(c) Polyethylene 

(d) Dacron

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(a) Natural rubber 

Natural rubber - It contains isoprene units.

Nylon-66 - It is formed by hexamethylenediamine and adipic acid.

Polyethylene - Polythene is formed by monomers of ethene. It is an addition polymer.

Dacron -  Dacron is formed by the interaction of ethylene glycol and terephthalic acid. It is a condensation polymer.

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