AIIMS 2018 Chemistry Salt Hydrolysis Assertion Reason Question
Assertion: Na₂SO₃ solution give basic solution in litmus solution Reason: It react with water and H₂SO₃ form
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
The assertion is true because Na₂SO₃ (sodium sulfite) dissociates in water to produce hydroxide ions (OH⁻), resulting in a basic solution that turns litmus paper blue. The reason is also true, as Na₂SO₃ reacts with water to form H₂SO₃ (sulfurous acid), but this reaction does not directly explain the basicity of the solution; rather, it is the formation of hydroxide ions that accounts for the basic nature. Options A and C are incorrect because while both statements are true, the reason does not correctly explain the assertion, and option D is incorrect as both statements are indeed true.
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