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The oxidation number of Mn in the produc...

The oxidation number of Mn in the product of alkaline oxidative fusion of `MnO_2` is

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The correct Answer is:
6
`2MnO_2 + 4KOH + O_2to 2K_2MnO_4 + 2H_2O`
Oxidation state of Mn in `K_2MnO_4` : 2(+1) + x + 4(-2) = 0 or x = +6
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