A) \[-{{\left( C{{H}_{2}}-\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\mathop{C}}\,=CH-C{{H}_{2}} \right)}_{n}}-\]
B) \[-{{\left( C{{H}_{2}}-\underset{\begin{smallmatrix} | \\ CN \end{smallmatrix}}{\mathop{CH}}\, \right)}_{n}}-\]
C) \[-{{\left( C{{H}_{2}}-\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\mathop{CH}}\, \right)}_{n}}-\]
D) \[-{{\left( \underset{\begin{smallmatrix} | \\ {{C}_{6}}{{H}_{5}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}} \right)}_{n}}-\]
Correct Answer: C
Solution :
Neoprene is polymer of chloroprene, \[nC{{H}_{2}}=CH-\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\mathop{C}}\,=C{{H}_{2}}\xrightarrow[polymerisation]{1,4-addition}\] \[(-C{{H}_{2}}-CH=\overset{\begin{smallmatrix} Cl \\ | \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{2}}-)\]
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