For the same alkyl group, the boiling
points of alkyl halides decrease in the order: RI> RBr> RCl> RF This
is because with the increase in size and mass of halogen atom, the
magnitude of van der Waal forces increases The boiling points of isomeric haloalkanes decrease with increase
in branching For example, 2-bromo-2-methylpropane has the lowest
boiling point among the three isomers