JEE CHEMISTRY MCQ: HALOALKANES AND HALO ARENES

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Assertion (A): Electrophilic substitution reactions in haloarene occur slowly and under drastic conditions.

Reason (R): Haloarenes are highly active as compared to benzene.

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Correct option: C

A is correct; R is incorrect

The correct answer is C (A is correct; R is incorrect) because haloarenes are less reactive than benzene due to the -I effect of the halogen.

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An alkyl halide reacts with metallic sodium in dry ether. The reaction is known as : In electrophilic substitution reaction of chlorobenzene, the chloro group: Which of the followings statements is/are incorrect? Polymerization of alkenes takes place through Assertion (A): The boiling points of alkyl halides decrease in the order:

RI > {R B r} > {R C I} > {R F}

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Reason (R): The boiling points of alkyl chlorides, bromides and iodides are considerably higher than that of the hydrocarbon of comparable molecular mass. Friedel-Craft’s reaction of bromobenzene with methyl iodide gives: