Question

Assertion (A): p-nitrophenol is less acidic than phenol.

Reason (R): Nitro group is electron withdrawing and helps in the stabilisation of p-nitrophenoxide ion.

Options

• 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

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

Explanation:

p-Nitrophenol is actually more acidic than phenol.
The reason for this lies in the electron-withdrawing nature of the nitro group \[\ce{(-NO2)}\] attached to the phenol ring in p-nitrophenol.