Assertion :Equivalent mass of $K M n O_{4}$ is equal to one-fifth of its molecular mass when it acts as an oxidisng agent in acidic medium. Reason: Oxidation number of $M n$ in $K M n O_{4}$ is $+ 7$ .

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

Equivalent mass of $K M n O_{4}$ is equal to one-fifth of its molecular mass when it acts as an oxidisng agent in acidic medium.The number of electrons involved in the reaction are 5.

Oxidation number of $M n$ in $K M n O_{4}$ is $+ 7$ .

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
Hence option B is corrrect.

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