(C) The $C-O$ bond length in alcohol is $142 \ pm$ and in phenol it is $136 \ pm$. The $C-O$ bond length in phenol is shorter than that in methanol du

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Carbon-oxygen bond length in methanol, $CH_3OH$ is shorter than that of $C-O$ bond length in phenol.

(C) The $C-O$ bond length in alcohol is $142 \ pm$ and in phenol it is $136 \ pm$. The $C-O$ bond length in phenol is shorter than that in methanol due to the conjugation of unshared pair of electrons on oxygen with the ring, which imparts double bond character to the $C-O$ bond. Thus, statement $C$ is incorrect.

Class 12 Chemistry Alcohols, Phenols and Ethers Properties of Phenols

Difficult

Which one of the following statements is not correct?

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A
Alcohols are weaker acids than water.
B
Acid strength of alcohols decreases in the following order: $RCH_2OH > R_2CHOH > R_3COH$.
C
Carbon-oxygen bond length in methanol, $CH_3OH$ is shorter than that of $C-O$ bond length in phenol.
D
The bond angle $C-O-H$ in methanol is $108.9^o$.