The variation of boiling points of hydrogen halides is in tha order HF gt HI gt HBr gt HCl . What explains the higher boiling point of hydrogen fluoride ?

The variation of boiling points of hydrogen halides is in tha order HF

1.	The variation of boiling points of hydrogen halides is in tha order HF gt HI gt HBr gt HCl . What explains the higher boiling point of hydrogen fluoride ?
Answer» There is strong hydrogen BONDING between HF molecules The bond energy of HF molecules is greater than in other hydrogen halides The EFFECT of nuclear shielding is much REDUCED in fluorine which polarises the HF molecule The electronegativity of flurine is much higher than for other elements in the group . Solution :HF froms strong intermolecular hydrogen bonds due to high elecrtonegatively of fluorine. Hence , the boiling point of HF is abnormally high. Boiling points of other hydrogen halides GRADUALLY increase from HCl to HI due to increase in the size of halogen atom from Cl to I whihc results in the increase of van Waal forces .