Question

Which of the following is most volatile ?

• A. HI
• B. HBr
• C. HCl
• D. HF

Answer 1

Answer: (C)

HCl

Answer 2

Boiling point of hydrogen halides is in the order HF > HC1 < HBr < HI Higher $b.p$ of HF than HCI is due to H-bonding. Thus, HC1 is most volatile.