Q6 / 120 · VITEEE 2014 · Chemistry

Which of the following hydrogen bonds are strongest in vapour phase?

  • Correct answer
    A
    $\mathrm{HF} \ldots \ldots \ldots . \mathrm{HF}$
  • B
    $\mathrm{HF} \ldots \ldots \ldots \ldots \mathrm{HCl}$
  • C
    $\mathrm{HCl} \ldots \ldots \ldots \ldots \mathrm{HCl}$
  • D
    $\mathrm{HF} \ldots \ldots \ldots \ldots \mathrm{HI}$

Solution

A compound having maximum electronegative element will form strong hydrogen bond. $F$ is the most negative element among halogens hence form strongest hydrogen bond.

Hence, the correct answer is option: 'A'.

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