Give reason :
Water is a liquid and hydrogen sulphide is a gas though O and S belong to the same group.

Explanation

Oxygen (O) and sulphur (S) belong to the same group and forms hydrides `H_2O` and `H_2S` respectively. Oxygen being more electronegative forms strong hydrogen bonding with hydrogen atom of another water molecule. While sulphur cannot make hydrogen bonds. Hence, boiling point of water increases making it liquid at room temperature.