Question

Assertion (A): Bromination of Phenol can be carried out even in the absence of Lewis acid.

Reason (R): \[\ce{-OH}\] group of Phenol has the high activation effect.

विकल्प

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

• Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).

• Assertion (A) is true, but Reason (R) is false.

• Assertion (A) is false, but Reason (R) is true.

Answer 1

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

Explanation:

Bromination of phenol without a Lewis acid is possible due to its higher reactivity towards electrophilic aromatic substitution processes than benzene. This is due to the presence of the hydroxy \[\ce{(-OH)}\] group, which acts as an ortho-para directing group.
The hydroxy group activates the aromatic ring towards electrophilic attack. Thus, it has a high activating effect.