Higher members
are liquids or solids As we have already learnt, molecules of organic
halogen compounds are generally polar Due to greater polarity as well
as higher molecular mass as compared to the parent hydrocarbon, the
intermolecular forces of attraction (dipole-dipole and van der Waals)
are stronger in the halogen derivatives That is why the boiling points
of chlorides, bromides and iodides are considerably higher than those
of the hydrocarbons of comparable molecular mass