Question

benzene
or nitrobenzene which undergo nitration first

Answer 1

Answer:

As nitration reactions are examples of electrophilic reactions , and the presence of electron density of compound to form nitrates is the main factor for deciding the ease of nitration reaction:

Toluene is methyl-benzene .This methyl group added to Toluene makes it special with certain properties like :

-->Methyl group is electron donating group.

-->Hence methyl group activates the benzene ring by pushing electrons on the benzene ring.

--> On the other hand nitro group on benzene is electron withdrawing group which deactivates benzene group by withdrawing the electrons from Benzene ring.

Hence the increasing order of nitration is as follows:

m-dinitrobenzene <Benzene<Toulene.

Explanation:

Answer 2

benzene would undergo a nitration first