Assertion :Oxidation number of $M n$ in $M n S O_{4}$ and $M n C_{2} O_{4}$ is same. Reason: Oxidation number of $M n$ is different in $M n_{3} O_{4}$ and $M n O_{4}^{- 2}$ .

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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Assertion is incorrect but Reason is correct

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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
The oxidation number of manganese in $M n S O_{4}$ and $M n C_{2} O_{4}$ is same. It is $+ 2$ . In both these compounds, manganese is present as $M n^{2 +}$ ion. Therefore, the reason is incorrect.
In $M n_{3} O_{4}$ , the oxidation number of manganese is $\frac{+ 8}{3}$ . In $M n O_{4}^{2 -}$ , the oxidation number of manganese is $+ 6$ .

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