JEE Advance - Chemistry (2009 - Paper 2 Offline - No. 16)
The oxidation number of Mn in the product of alkaline oxidative fusion of MnO$$_2$$ is ___________.
Answer
6
Explanation
The reaction for alkaline oxidative fusion is
2MnO$$_2$$ + 4KOH + O$$_2$$ $$\to$$ 2K$$_2$$MnO$$_4$$ + 2H$$_2$$O
In potassium manganite formed as product :
K$$_2$$MnO$$_4$$
2(+1) + $$x$$ + 4($$-$$2) = 0
$$2+x-8=0$$
$$x-6=0\Rightarrow x=+6$$
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