Chemistry - Complete d-block Question with Solution | TestHub

When ${\mathrm{XO}}_2$ is fused with an alkali metal hydroxide in presence of an oxidizing agent such as ${\mathrm{KNO}}_3$; a dark green product is formed which disproportionate in acidic solution to afford a dark purple solution. $\mathrm{X}$ is $\mathrm{Mn}$