Question

Given below are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): $S_{N}2$ reaction of an optically active aryl halide with an aqueous solution of $KOH$ always gives an alcohol with opposite sign of rotation.
Reason (R): $S_{N}2$ reactions always proceed with inversion of configuration.

• A. Both A and R are true and R is the correct explanation of A
• B. Both A and R are true but R is not the correct explanation of A
• C. A is true but R is false
• D. A is false but R is true

Answer 1

The correct option is D A is false but R is true

Aryl halides do not undergo nucleophilic substitution under ordinary conditions. This is due to resonance, because of which the $C-Cl$ bond acquires partial double bond character, hence it becomes shorter and stronger and thus cannot be replaced by nucleophiles. So assertion is false however reason is true