HF. is least volatile and HCl is most volatile amongst hydrogen halides.

Is Hi more volatile than HCl?

So, among HCl, HBr and HI, HCl is most volatile. Next, HF should be more volatile than HCl, but due to intermolecular hydrogen bonding in HF, it is less volatile. Hence, HCl is most volatile among the group.

Which halogen hydride is most volatile?

(b) Boiling point of HF is highest due to the H-bonding. For other halogen acids boiling point increase in the order HCl<HBr<HI . Therefore, most volatile (with lower boiling point) is HCl.