Chemistry · EQUILIBRIUM
हिन्दीGiven below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In aqueous medium, \( \text{H}_2\text{S} \) is a stronger acid than \( \text{H}_2\text{O} \). Reason (R): The electronegativity of oxygen is lower than that of sulphur, making the H-O bond weaker than the H-S bond. In the light of the above statements, choose the correct answer from the options given below:
Correct answer · Option 3
(A) is true but (R) is false.
Explanation
\( \text{H}_2\text{S} \) is stronger than \( \text{H}_2\text{O} \) due to lower bond strength of H-S down the group. Oxygen is more electronegative than sulfur, so (R) is false.