Question

Assertion (A) Carbon oxygen bond length of phenol is slightly less than that of methanol.
Reason (R) There exist a partial double bond character and $s p^{2}$-hybridisation of carbon to which oxygen is attached in phenol.

• 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.

Answer 1

Answer: (A)

In phenols, the $- OH$ group is attached to $s p^{2}$-hybridised carbon atom of an aromatic ring. So, the carbon oxygen bond length $(136\, pm )$ in phenol is slightly less than that in methanol.