$\underbrace{HF\,}_{H\,-\,Bonding}\,>\,\,\underbrace{HI\,\,>\,\,HBr\,\,>\,\,HCl}_{\begin{smallmatrix} 
 Dipole\,\,dipole \\ 
 attraction\,\,(V.W.forces) 
\end{smallmatrix}}$

In case of same type of van der waal's forces of attraction b.pt. $\propto $ molecular mass.