If the boiling point of $\mathrm{H}_{2} \mathrm{O}$ is 373 K , the boiling point of $\mathrm{H}_{2} \mathrm{~S}$ will be:

(C) greater than 300 K but less than 373 K

JEE Main · 2020 · 03 Sep 2020 · Shift 1 · Chemical Bonding and Molecular Structure

If the boiling point of

H_{2} O

is 373 K , the boiling point of

H_{2} S

will be:

Answer: (B)

A high boiling point for water comes from its extensive hydrogen bonding. Sulphur is far less electronegative than oxygen, so

H_{2} S

forms no effective hydrogen bonds and stays a gas at room temperature, boiling near

213

K, well below

300

JEE Main · 2020 · 03 Sep 2020 · Shift 1 · Single correct option