Assertion :Solubility of sparingly soluble salt decreases due to common ion effect. Reason: Solubility product constant does not depend on common ion effect.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Common ion effect: The degree of dissociation of a weak electrolyte is suppressed by the addition of another electrolyte containing the common ion.
So solubility of sparingly soluble salt decreases due to common ion effect but solubility product is independent of common ion effect as it is temperature dependent only and nature of the weak electrolyte.

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