Oh heating pyrolusite with `KOH` in presence of air we get

When pyrolusite is fused with KOH in presence of air, the fused mass becomes:

Potassium permanganate is prepared by fusing pyrolusite with caustic potash in the presence of air or some oxidising agent which gives a green mass. The green mass is then extracted with water and treated with a current of Cl_2 to form potassium permanganate. In the laboratory, it is prepared by oxidising a manganese (II) salt by peroxosulphate. It acts as an oxidising agent in neutral, alkaline or acidic solutions. Name the green mass obtained by heating pyrolusite with KOH in the presence of air and its reaction equation.

When MnO_(2) is fused with KOH in the presence of air, a coloured compound is formed, the product and its colour is

Show by balanced chemical equation what happens when MnO_2 is fused with KOH in the presence of air.

When isopropyl bromide is heated with sodium in the presence of dry ether, we get :