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(a). IF both (A) and (R) are correct and...

(a). IF both (A) and (R) are correct and (R) is the correct explanation of (A).
(b). If both (A) and (R) are correct but (R) is not the correct explanation of (A).
(c). If (A) is correct, but (R) is incorrect.
(d). If (A) is incorrect, but (R) is correct. ltbr. (e) if both (A) and (R) are incorrect.
Q. Assertion (A): Equivalent mass of `KMnO_(4)` is equal to one-fifth of its molecular mass when it acts as oxidising agent in mild basic medium.
Reason (R): Oxidation number of Mn in `KMnO_(4)` is `+7`.

Text Solution

Verified by Experts

The correct Answer is:
D
(A) is false Since, in mild basic medium
`(3e^(-)+MnO_(4)^(ɵ)toMnO_(2))`, and `Ew=(Mw)/(3)`
Therefore (R) is true `(overset(+1)(K)overset(+7-2xx4)(MnO_(4)))`.
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