Question

H₂S is more acidic than H₂O although sulphur is less electronegative than oxygen. This is because ______.

Options

• water is a highly associated compound.

• H-S bond is weaker than H-O bond.

• the molecular weight of H₂S is more than that of H₂O.

• H₂S is a gas while H₂O is a liquid.

Answer 1

H₂S is more acidic than H₂O although sulphur is less electronegative than oxygen. This is because H-S bond is weaker than H-O bond.

Explanation:

H₂S is more acidic than H₂O because the H-S bond in H₂S is weaker than the H-O bond in water. This weaker bond breaks more easily to release H⁺ ions, making H₂S more acidic despite sulphur being less electronegative than oxygen.