Question

Why toluene is more reactive towards electrophilic substitution

Answer 1

Toluene is more reactive towards electrophilic nitration due to presence of electron donating methyl group.
Electrophilic nitration involves attack of nitronium ion on benzene ring. The reactivity of benzene ring increases with increase in the electron density on it. The group which increase the electron density on the ring also increase the reactivity towards electrophilic substitution. These groups which show +I or +M effect like alkyl, alkoxy etc., release electrons towards benzene ring.