Alkaline oxidative fusion of \(MnO _2\) gives "A" which on electrolytic oxidation in alkaline solution produces B. A and…

Alkaline oxidative fusion of MnO₂:

\(2{\mathrm{MnO}}_{2}+4{\mathrm{OH}}^{−}+{\mathrm{O}}_{2}\to 2{\mathrm{MnO}}_{4}^{2−}+2{\mathrm{H}}_{2}\mathrm{O}\)

Electrolytic oxidation of \({\mathrm{MnO}}_{4}^{2−}\) in alkaline medium.

\({\mathrm{MnO}}_{4}^{2−}\to {\mathrm{MnO}}_{4}^{−}+{\mathrm{e}}^{−}\)