1.

Which of the following is not true? (1) Natural rubber has ‘trans’ configuration at every double bond. (2) Natural rubber is 1, 4-polymer of isoprene. (3) In vulcanisation the rubber becomes harder and stronger. (4) Buna-S is a co-polymer of Butene and styrene. 

Answer»

Correct option (1) & (4)

Explanation:

Natural rubber is cis-polyisoprene

Buna-S is a co-polymer of Butadiene and styrene.



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