If the boiling point of ${\text{H}}_2\text{O}$ is $373\text{K}.$ the boiling point of ${\text{H}}_2\text{S}$ will be 

At room temperature water is liquid and has boiling point $373 \text{K}$ due to hydrogen bonding. Where as ${\text{H}}_2\text{S}$ is gas and it has no hydrogen bonding. Hence boiling point  is less than $300 \text{K}$ [Boiling point of ${\text{H}}_2\text{S}$is $-60°C$]