Question

o,m.p-dichlorobenzenes(Increasing order of melting points).I guess para has higest.plzz conform it...

Answer 1

p-dichlorobenzene has highest melting point due to its symmetry and structure which is followed by ortho and then meta.
Simply Para > Ortho > Meta
And the interesting thing is melting point is directly proportional to symmetry of compound. Therefore symmetry of compound goes in same manner as melting point.