Question

Which of the most volatile compounds?

• A. HI
• B. HCI
• C. HBr
• D. HF

Answer 1

Answer: (B)

HCI

Answer 2

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