How many of the following groups if substituted at o- and / or p- positions of chlorobenzene, increase its reactivity towards nucleophilic substitution? - CN , - CH 3 - NH ( CH 3 ) , - COOH , - NO 2 , - OCH 3

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Correct answer: 3

The presence of electron-withdrawing groups (like - CN , - COOH , - NO 2 ) at o- and p- positions with respect to halogen atom activates the aryl halide towards nucleophilic substitution reactions.

How many of the following groups if substituted at o- and / or p- positions of chlorobenzene, increase its reactivity towards nucleophilic substitution? - CN , - CH 3 - NH ( CH 3 ) , - COOH , - NO 2 , - OCH 3

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