Question:
If the boiling point of $\mathrm{H}_{2} \mathrm{O}$ is $373 \mathrm{~K}$, the boiling point of $\mathrm{H}_{2} \mathrm{~S}$ will be :
Correct Option: 1
Solution:
At room temperature, water is liquid and has boiling point $373 \mathrm{~K}$ due to hydrogen bonding. Whereas $\mathrm{H}_{2} \mathrm{~S}$ is a gas and it has no hydrogen bonding. Hence boiling point of $\mathrm{H}_{2} \mathrm{~S}$ is less than $300 \mathrm{~K}$ (boiling point of $\mathrm{H}_{2} \mathrm{~S}$ is $-60^{\circ} \mathrm{C}$ ).
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