A) \[C{{H}_{2}}=CH-C\equiv CH\]
B) \[C{{H}_{2}}=\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-CH=C{{H}_{2}}\]
C) \[C{{H}_{2}}=\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,-CH=C{{H}_{2}}\]
D) \[C{{H}_{2}}=CH-CH=C{{H}_{2}}\]
Correct Answer: C
Solution :
Neoprene is synthetic rubber and is a polymer of chloroprene which is chemically 2-chlorobuta-1,3-diene. \[\underset{\text{Chloroprene}}{\mathop{nC{{H}_{2}}=\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,-CH=C{{H}_{2}}}}\,\xrightarrow{{}}\underset{\text{Neoprene}}{\mathop{{{\left[ C{{H}_{2}}-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,=CH-C{{H}_{2}}- \right]}_{n}}}}\,\]
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