Give the reactivity of electrophilic substitution reaction.
The reactivity order we should know that in this the electron releasing groups are more powerful or activated as compared to the other groups as the result of this the benzene ring do not interfere in the substitution reaction. Phenol is the most reactive followed by benzene which is followed by chlorobenzene and benzoic acid.
Phenol>benzene>chlorobenzene>benzoic acid