Assertion : Rates of nitration of benzene and | vedclass

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(D) The rate of nitration of benzene and hexadeuterobenzene is the same because the rate-determining step (formation of the sigma complex or carbocati

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If both the Assertion and Reason are incorrect.

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(D) The rate of nitration of benzene and hexadeuterobenzene is the same because the rate-determining step (formation of the sigma complex or carbocation) is the same in both cases.This step does not involve the cleavage of the $C-H$ or $C-D$ bond,which occurs in the subsequent fast step.Furthermore,the $C-D$ bond is actually stronger than the $C-H$ bond due to lower zero-point energy,making the Reason statement also incorrect.Therefore,both the Assertion and the Reason are incorrect.

Assertion : Rates of nitration of benzene and hexadeuterobenzene are different.
Reason : $C-H$ bond is stronger than $C-D$ bond.

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Assertion : Rates of nitration of benzene and hexadeuterobenzene are different.Reason : $C-H$ bond is stronger than $C-D$ bond.