A) butadiene
B) ethyne
C) styrene
D) isoprene
Correct Answer: D
Solution :
Polysoprene is the natural rubber which is polymer of isoprene. \[n\underset{\text{Isopropene}}{\mathop{\left[ C{{H}_{2}}=CH-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,=C{{H}_{2}} \right]}}\,\xrightarrow{\text{Polymerisation}}\] \[-\underset{\begin{smallmatrix} \text{Polyisopropene} \\ \text{(Natural}\,\,\text{rubber)} \end{smallmatrix}}{\mathop{{{\left[ C{{H}_{2}}-CH=\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{2}}- \right]}_{n}}}}\,\]
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