A) \[\begin{align} & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\text{Cl} \\ & \text{C}{{\text{H}}_{\text{2}}}\text{ = }\overset{\text{ }\!\!|\!\!\text{ }}{\mathop{\text{C}}}\,-CH=C{{H}_{2}} \\ \end{align}\]
B) \[C{{F}_{2}}=C{{F}_{2}}\]
C) \[C{{H}_{2}}=CHCl\]
D) \[CC{{l}_{2}}=CC{{l}_{2}}\]
Correct Answer: A
Solution :
Neoprene is an addition polymer of chloroprene or chloro 1, 3-butadiene (monomer) and the structure of chloroprene is \[\left( \begin{align} & -C{{H}_{2}}=\underset{|}{\mathop{C}}\,-CH=C{{H}_{2}} \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl \\ \end{align} \right)\]
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