Assertion (A): Bromination of benzoic acid gives m-bromobenzoic acid.
Reason (R): The carboxyl group increases the electron density at the meta position.
Reason (R): The carboxyl group increases the electron density at the meta position.
- (A)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- (B)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
- (C)Assertion (A) is true, but Reason (R) is false.✓ Correct
- (D)Assertion (A) is false, but Reason (R) is true.
Answer: (C)
Solution
–COOH is deactivating (−I, −R): it \textit{lowers} electron density everywhere, least severely at meta — so the electrophile lands meta (A true).
R claims –COOH \textit{increases} meta density — false; it merely decreases o/p density more.
Correct option: (C).
R claims –COOH \textit{increases} meta density — false; it merely decreases o/p density more.
Correct option: (C).
CBSE Class 12 Board · 2023 · Single correct option