Benzyl chloride undergoes nucleophilic substitution much more easily than chlorobenzene. Explain. 

Explanation

Benzyl chloride undergoes nucleophilic substitution readily via resonance stabilised benzyl carbocation.

On the other hand C-Cl bond in benzene has partial double bond character due to resonance and hence is difficult to cleave.
Hence, benzyl chloride undergoes nucleophilic substitution much more easily than chlorobenzene.