9. Which sequence should isomeric dichlorobenzenes be boiled in? a) para>ortho>meta b) meta>ortho>para c) ortho>meta>para d) para>meta>ortho
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.
