Question

Q . WHICH OF THE FOLLOWING IS MOST VOLATILE AND WHY?-
HF
HCl
HI
HBr

Answer 1

Answer:

Explanation:

Volatility depends on intermolecular interactions of a compound, as molecular weight increases so do the Vander wals forces. So the expected order should be: HF < HCl<HBr<HI   "but we must remember HF has hydrogen bonding and the extent of Hydrogen bonding is very high because of high electonegativity of fluorine and linear bonding".   Hence HF is least volatile. The correct order is HCl<HBr<HI <HF