Question

Which of the follwoing compounds has the least tendency to form $H-$bonds?

• A. $HF$
• B. $HCl$
• C. $H_{2}O$
• D. $N{H}_3$

Answer 1

Answer: (A)

$HF$

The molecules were polarized and the angle between the lone pair varies and pushed away to form hydrogen bond so the electron field is destroyed.Hence the hydrogen fluoride $HF$ which has tendency to form the hydrogen bond.
Conclusion: hence the option (A) is correct.