Question

Which of the following compounds is most volatile ?

• A. HF
• B. HCl
• C. HBr
• D. HI

Answer 1

Answer: (B)

HCl

Answer 2

Strongest intermolecular H-bond exist in HF therefore HF is least volatile. In HCl the Vanderwaals force of attraction is minimum hence HCl is most volatile.