Answer:
Due
to donation of the lone pair of electrons on the oxygen atom to the benzene
ring, phenol can be written as a resonance hybrid of five structures, I?V as
given on page 11/24. Out of these, structures n, in and IV contain a
carbon-oxygen double bond. In other words, carbon-oxygen bond in phenols has
some double bond character while in alcohols it is a pure single bond.
Therefore, OH group in phenols is more strongly held as compared to OH group in
alcohols.
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