MCQ
$\begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   Cl-C{{H}_{2}}-C-C{{H}_{2}}-C{{H}_{2}}-Cl+{{I}^{-}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   \,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}\xrightarrow[DMF]{}$  product; Major product of this reaction is
  • A
    $\begin{matrix}
       C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
       |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
       I-C{{H}_{2}}-C-C{{H}_{2}}-C{{H}_{2}}-Cl  \\
       |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
       C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
    \end{matrix}$
  • $\begin{matrix}
       C{{H}_{3}}\,\,\,\,\,\,\,\,  \\
       |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
       Cl-C{{H}_{2}}-C-C{{H}_{2}}-C{{H}_{2}}-I  \\
       |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
       C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,  \\
    \end{matrix}$
  • C
    $\begin{matrix}
       C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
       |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
       {{H}_{2}}C=C-C{{H}_{2}}-C{{H}_{2}}=Cl  \\
    \end{matrix}$
  • D
    $\begin{matrix}
       \,C{{H}_{3}}  \\
       |\,\,\,\,\,\,\,\,  \\
       Cl-C{{H}_{2}}-C-C{{H}_{2}}=C{{H}_{2}}  \\
       |\,\,\,\,\,\,\,\,\,  \\
       C{{H}_{3}}  \\
    \end{matrix}$

Answer

Correct option: B.
$\begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   Cl-C{{H}_{2}}-C-C{{H}_{2}}-C{{H}_{2}}-I  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}$
b
$(b)$ $S_{N^2}$ reaction is favourable at least crowded site.

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