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  • Assertion (A): It is difficult to replace chlorine by -OH in chlorobenzene in comparison to that in chloroethane.

In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question:

(i) Assertion and reason both are correct and reason is correct explanation of assertion.
(ii) Assertion and reason both are wrong statements.
(iii) Assertion is correct but reason is wrong statement.
(iv) Assertion is wrong but reason is correct statement.
(v) Assertion and reason both are correct statements but reason is not correct explanation of assertion.

Assertion (A): It is difficult to replace chlorine by -OH in chlorobenzene in comparison to that in chloroethane.

Reason (R): Chlorine-carbon (C – Cl) bond in chlorobenzene has a partial double bond character due to resonance.

Answers (1)

(i) There is a partial double bond formed due to resonance in between benzene ring and halogen. As a result, it is difficult for the aryl halide to take part in nucleophilic substitution as compared to the alkyl halide.

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