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  4. The oxidation number of Mn in the product of alkaline oxidative fusion of MnO2 is

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Q. The oxidation number of $Mn$ in the product of alkaline oxidative fusion of $MnO_{2}$ is

NTA AbhyasNTA Abhyas 2022

Solution:

The oxidation number of $Mn$ in the product of alkaline oxidative fusion of $MnO_{2}$ is +6 as follows.
$4KOH+2MnO_{2}+O_{2} \rightarrow \underset{\text{Potassium maganate}}{\overset{+ 2 \text{+x} - 8}{2 K_{2} M n O_{4}} + 2 H_{2} O}$
$+2+x-8=0$
$x=+6$ .