Question

when MN O2 is fused with KOH in presence of KNO3 as an oxidizing agent it gives the dark green compound (A) ,compound (A) disproportionate in acidic solution to give purple compound (B) , and alkaline solution of compound (B) oxidised KI to compound (C) whereas an acidified solution of compound (B) oxidised KI to compound (D), identified compound (A), (B), (C), (D)?

Answer 1

MnO2 + KOH → K2MnO4(Green)