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NEET levelSingle correct optionDifficulty 1 of 3cb171

Which of the following hydrides shows hydrogen bonding in the liquid state?

A $H X_{2} S$
B $PH X_{3}$
C $HF$
D $HCl$

Answer: C

Hydrogen bonding needs H bonded to a small, highly electronegative atom (F, O, N). Only

HF

among the choices has H attached to such an atom.

HCl

,

H X_{2} S

and

PH X_{3}

show no significant hydrogen bonding.

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