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When a mananous salt is fused with a mixture of `KNO_(3)` and and solid NaOH, the oxidation number of Mn change from +2 to:

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When a mananous salt is fused with a mixture of `KNO_(3)` and and solid NaOH, the oxidation number of Mn change from +2 to:
A. `+4`
B. `+3`
C. `+6`
D. `+7`
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Correct Answer - C
`overset(+2)(M)n+OH^(-)+NO_(2)^(-) rarr overset(+6)(M) nO_(4)^(-2)+H_(2)O`..
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