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Q.

Oxygen is more electronegative than sulphur, yet H2S is acidic while H2O is neutral. This is because

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a

Water is a highly associated compound

b

H–S bond is weaker than H–O bond

c

H2S is a gas while H2O is a liquid

d

The molecular weight of H2S is more

answer is B.

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Detailed Solution

  • Electronegativity of oxygen is more than sulfur and the size of O is smaller than S. Therefore, the H−O bond is stronger than H−S bond. 
  • As a result, H2S easily donates proton and becomes more acidic than water.
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Oxygen is more electronegative than sulphur, yet H2S is acidic while H2O is neutral. This is because