Question

Which one has the lowest boiling point?

• A. $H_{2}O$
• B. $H_{2}Se$
• C. ${NO}_2$
• D. All have same boiling point

Answer 1

The correct option is B $H_{2}Se$

$H_{2}Se$ has the lowest boiling point.

The boiling point of water $H_{2}O$ is more than the $H_{2}Se$ because the water contain intermolecular hydrogen bonding.

Also the boiling point of $N{O}_2$ is more than the $H_{2}Se$.