1.

Which one of the following statements is not true? [CBSE AIPMT 2008]

A. Natural rubber has the trans-configuration at every double bond
B. Buna-S is a copolymer of butadiene and styrene
C. Natural rubber is a 1, 4-polymer of isoprene
D. In vulcanization, the formation of sulphur bridges between different chains make rubber harder and stronger.
Answer» B. Buna-S is a copolymer of butadiene and styrene


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