Which of the following hydrogen bonds is the strongest?

Which of the following hydrogen bonds is the strongest?
  1. $\mathrm{O}-\mathrm{H} \ldots \ldots \mathrm{N}$
  2. $\mathrm{F}-\mathrm{H} \ldots \ldots \mathrm{F}$
  3. $\mathrm{O}-\mathrm{H} \ldots \ldots . \mathrm{O}$
  4. $\mathrm{O}-\mathrm{H} \ldots \ldots \mathrm{F}$

Solution

The hydrogen bond in $\mathrm{HF}$ is strongest, because fluorine is the most electronegative element. Thus, (B) is the correct option.

Asked in: JEE Main 2007

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