Question

Which one shows maximum hydrogen bonding?

• A. $H_2O$
• B. $H_2Se$
• C. $H_2S$
• D. $HF$

Answer 1

Answer: (D)

$HF$

Answer 2

Hydrogen bonding $\propto$ electronegativity $\propto \frac{1}{_{H \, is \, covalently \, bonded}^{Size \, of \, atom \, to \, which}}$
Since, F is most electronegative and has smaller size, HF shows maximum strength of hydrogen bond.