A) styrene
B) isoprene
C) butadiene
D) ethylene
Correct Answer: B
Solution :
Natural rubber is cis-polyisoprene. It is polymer of isoprene. \[\underset{\begin{smallmatrix} \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Isoprene \\ 2-methyl\text{ }1,3-butadiene \end{smallmatrix}}{\mathop{nC{{H}_{2}}=\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,-CH=C{{H}_{2}}}}\,\xrightarrow[{}]{polymerisation}\] \[-(C{{H}_{2}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,=CH-C{{H}_{2}}){{-}_{n}}\]
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