Question

Which of the following hydrogen bonds are strongest in vapour phase?

• A. HF . . . HF
• B. HF . . . HI
• C. HCl . . . HCl
• D. HF . . . HI

Hint:

HF exhibits the strongest hydrogen bonds because fluorine is highly electronegative.

Answer 1

The Correct Option is A

Hydrogen bonds are strongest when the hydrogen is bonded to a highly electronegative atom like fluorine. The HF . . . HF interaction is the strongest in the vapour phase.