Although phenoxide ion has more number of resonating structures than carboxylate ions carboxylic acid is a stronger acid than phenol. Why ?

Explanation

`to` Phenoxide ion has a non-equivalent resoonance structures in which the negative charge is at the less electronegative carbon atom.
`to` The negative charge is delocalised over two electronegative oxygen atoms in carboxylic ion whereas in phenoxide ion the negative charge less effectively delocalised over one oxygen atom and less electronegative carbon atom.