A) In vulcanisation, the formation of sulphur bridges between different chains make rubber harder and stronger
B) Natural rubber has the traras-configuration at every double bond
C) Buna-S is a copolymer of butadiene and styrene
D) Natural rubber is a 1, 4-polymer of isoprene
Correct Answer: B
Solution :
Natural rubber is cis-polyisoprene and is prepared from latex which is obtained from rubber tree (Hevea brasiliensis).
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