How many trisubstituted benzene may be obtained from o-,m-and p-chlorotoluene and why ?

Explanation

Each of o-and m-chlorotoluene will give 4 trisubstituted benzenes, while p-chlorotoluene will give two trisubstituted benzenes. This is because there are 4 types of non-equivalent hydrogens (or positions) in each of the ortho- and meta-isomers and two types of non-equivalent hydrogens (or positions ) in the para-isomer.