Question

Why water is liquid and hydrogen sulphide is a gas?

Answer 1

Answer:

In h2o there is hydrogen bonding because oxygen has a high electronegativity(only second to flourine).

so, the hydrogen atoms from other molecules of water forms a hydrogen bonds with oxygen resulting in intermolecular hydrogen bonding.

therefore at room temperature h2o is a liquid and h2s is a gas.

Answer 2

Answer:

In H2O there is hydrogen bonding between the molecules because oxygen has a high electronegativity.

So, the hydrogen atoms from a water molecule forms hydrogen bonding with oxygen of neighboring water molecule resulting in strong inter-molecular hydrogen bonding. This is why water is in liquid form at room temperature.

While in case of  H2S the electronegativity of sulphur is low compared to oxygen so, the hydrogen bonding is negligible in case of H2S, and the only binding force is weak Van Der Waals or London force of attraction between the molecules. Therefore H2S is a gas at room temperature.

Explanation: