Read the given passage and answer the questions that follow : The anomalous behaviour of oxygen, like other members of p-block present in second period is due to its small size and high electronegativity. One typical example of effects of small size and high electronegativity is the presence of strong hydrogen bonding in H_2O which is not found in H_2S. The absence of d-orbitals in oxygen limits its covalency to four and in practice, rarely exceeds two. On the other hand, in case of other elements of the group, the valence shells can be expanded and covalence exceeds four. H_2O is a water at room temperature whereas H_2S is a gas.

Read the given passage and answer the questions that follow : The anom

1.	Read the given passage and answer the questions that follow : The anomalous behaviour of oxygen, like other members of p-block present in second period is due to its small size and high electronegativity. One typical example of effects of small size and high electronegativity is the presence of strong hydrogen bonding in H_2O which is not found in H_2S. The absence of d-orbitals in oxygen limits its covalency to four and in practice, rarely exceeds two. On the other hand, in case of other elements of the group, the valence shells can be expanded and covalence exceeds four. H_2O is a water at room temperature whereas H_2S is a gas.
Answer» Solution :Due to high ELECTRONEGATIVITY of OXYGEN, water shows hydrogen BONDING and therefore has a higher boiling point. Therefore it is a liquid at room temperature.