Which of the following is the least reactive towards
nucleophile?

C H_{3} C H_{2} C l

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C H_{3} C l

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H_{2} C = C H = C H_{2} C l

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C_{6} H_{5} C l

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C H_{3} C H (C l) C H_{3}

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Solution

The correct option is C $C_{6} H_{5} C l$
Due to delocalization of electrons in benzene ring , it is difficult to attach nucleophile .In $C_{6} H_{5} C l$ , there is no -M group .So, it does not participate in nucleophilic substitution reaction.Therefore, $C_{6} H_{5} C l$ is the least reactive towards nucleophile.
Hence, Option D is correct.

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