The relatively high boiling point of HF is due to - Vidyadip

MCQ

The relatively high boiling point of $HF$ is due to

✓
Hydrogen bonding
B
Covalent bonding
C
Unshared electron pair on $F$
D
Being a halogen acid

✓

Answer

Correct option: A.

Hydrogen bonding

a
Since fluorine is more electronegative than nitrogen, $H - F$ bonds are much more polar than $N - H$ bonds. Due to the high partial charges on $H$ and $F$ in $HF$, a Hydrogen bond between $HF$ molecules is much stronger than that between $NH_3$ molecules. The high boiling point of $HF$ is thus due to the strong $H$-bond.

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