Assertion :Both ferrous and ferric ions are present in 3rd group. Reason: Both ferrous and ferric ions have same solubility product.

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 C Assertion is correct but Reason is incorrect
Third analytical group of cations include $F e^{+ 2}, F e^{+ 3}, A l^{+ 2}$ and $C r^{+ 3}$ . Thus both $f e r r o u s$ and are $f e r r i c$ ions are present. Solubility product is the product of its dissolved ion concentrations raised to the power of their stiochiometric coefficients.
It defines the degree of which the compound can dissociate in water, since $f e r r o u s$ and $f e r r i c$ ions have different degree of dissociation in water. Therefore, they do not have same solubility product.

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