Chemistry - Complete d-block Question with Solution | TestHub

The oxidation number of Mn in the product of alkaline oxidative fusion of$\mathrm{M}\mathrm{n}{\mathrm{O}}_2$is +6 as follows.
$4\mathrm{K}\mathrm{O}\mathrm{H}+2\mathrm{M}\mathrm{n}{\mathrm{O}}_2+{\mathrm{O}}_2\to \underset{\text{Potassium maganate}}{\stackrel{+2\text{+x}-8}{2{\mathrm{K}}_2\mathrm{M}\mathrm{n}{\mathrm{O}}_4}+2{\mathrm{H}}_2\mathrm{O}}$
$+2+\mathrm{x}-8=0$
$\mathrm{x}=+6$.