Question

In which of the following compounds is hydrogen bonding strongest in the liquid phase?

• A. $HF$
• B. $C{H}_4$
• C. $HI$
• D. $P{H}_3$

Answer 1

The correct option is A $HF$

Compound containing highly elelctronegative element (F, O, N) attached to an electropositive element (H) show hydrogen bonding. Fluorine(F) is highly electronegative and has smaller size. So hydrogen fluoride shows the strongest hydrogen bonding in liquid phase.