A) styrene
B) chloroprene
C) \[C{{H}_{2}}=\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,-CH=C{{H}_{2}}\]or isoprene
D) 1, 3-butadiene
Correct Answer: C
Solution :
The commercial natural rubber is obtained from the tree Hevea brasiliensis. Natural rubber is found to be a polymer of cis-isoprene. \[C{{H}_{2}}=\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,CH=C{{H}_{2}}\] Hence, it is a polymer of cis-isoprene.
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