Assertion (A) Bromination of phenol takes place even in the absence of Lewis acid. Reason (R) In phenol, OH group attached to benzene ring has highly deactivating effect.

Question

Assertion (A) Bromination of phenol takes place even in the absence of Lewis acid. Reason (R) In phenol, OH group attached to benzene ring has highly deactivating effect. (A) Both A and R are correct; R is the correct explanation of A. (B) Both A and R are correct; R is not the correct explanation of A. (C) A is correct; R is incorrect. (D) R is correct; A is incorrect.

Tardigrade Admin · Accepted Answer

In case of phenol, the polarisation of bromine molecule takes place even in the absence of Lewis acid. It is due to the highly activating effect of OH group attached to the benzene ring.

Q. Assertion (A) Bromination of phenol takes place even in the absence of Lewis acid.
Reason (R) In phenol, $O H$ group attached to benzene ring has highly deactivating effect.

Both A and $R$ are correct; $R$ is the correct explanation of $A$ .

Both A and $R$ are correct; $R$ is not the correct explanation of $A$ .

$A$ is correct; $R$ is incorrect.

$R$ is correct; $A$ is incorrect.

In case of phenol, the polarisation of bromine molecule takes place even in the absence of Lewis acid. It is due to the highly activating effect of $O H$ group attached to the benzene ring.

Q. Assertion (A) Bromination of phenol takes place even in the absence of Lewis acid. Reason (R) In phenol, OH group attached to benzene ring has highly deactivating effect.

Both A and R are correct; R is the correct explanation of A.

Both A and R are correct; R is not the correct explanation of A.

A is correct; R is incorrect.

R is correct; A is incorrect.