1.

When manganous salt is fused with a mixture of KNO_(3) and solid NaOH, the oxidation number of Mn changesfrom +2 to

Answer»

`+4`
`+3`
`+6`
`+7)`

SOLUTION :`Mn^(2+) + 2OH^(-) + (O) underset("of manganous salt")OVERSET("Alkaline OX.")(rarr)MnO_(2)+ H_(2)O`
`MnO_(2)+ 2NaOH + underset("(From KNO_(3))")(O) rarrNa_(2)overset(+6)(Mn)O_(4)+H_(2)O`


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