CBSE Class 12 Chemistry 2022 Term 1 Paper

Question : 47 of 55

Marks: +1, -0

Assertion (A): Chlorobenzene is less reactive towards nucleophilic substitution reaction.
Reason (R): Nitro group in chlorobenzene increases its reactivity towards nucleophilic substitution reaction.

Both A and R are true and R is the correct explanation of $A$ .
Both ${\A}$ and ${\R}$ are true but ${\R}$ is not the correct explanation of $A$ .
$A$ is true but $R$ is false.
A is false but ${\R}$ is true.

Solution:

Presence of nitro group on ortho or para position in the ring makes the ring more electron deficient and activated towards nucleophilic substitution reaction as compared to chlorobenzene.

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