Question

Answer the following:
Why the $C=O$ in $RCOOH$ is less reactive towards nucleophiles than in aldehydes and ketones?

Answer 1

In $RCOOH$ there is less positive charge on a carbon atom of the $C=O$ group. thus, this carbon is less electrophilic in $RCOOH$ in comparison to aldehydes and ketones and so is less reactive towards nucleophiles.