When an oxide of manganese(A) is fused with KOH in the presenceof an oxidising agent and dissolvedin water, it gives a dark green solution of compound (B). Compound(B) disproportionates in neutralor acidic solution to give purple compound (C ). An alkaline solution of compound (C ) oxides potassium iodide solutionto a compound (D)and compound (A) is also formed.Identity compounds A to D andalso explain the reactions involved.

When an oxide of manganese(A) is fused with KOH in the presenceof an o

1.	When an oxide of manganese(A) is fused with KOH in the presenceof an oxidising agent and dissolvedin water, it gives a dark green solution of compound (B). Compound(B) disproportionates in neutralor acidic solution to give purple compound (C ). An alkaline solution of compound (C ) oxides potassium iodide solutionto a compound (D)and compound (A) is also formed.Identity compounds A to D andalso explain the reactions involved.
Answer» Solution :`A=MnO_(2), B=K _(2)MnO_(4) , C=KMnO_(4) , D = KIO_(3)` Reactions `: UNDERSET((A))(2MnO_(2))+4KOH + O_(2) rarrunderset((B))(2K_(2)MnO_(4)) + 2H_(2)O` `3MnO_(4)^(2-)+ 4H^(+)rarr underset((C ))(2MnO_(4)^(-)) + MnO_(2)+2H_(2)O` `2MnO_(4)^(-) + H_(2)O + KI rarr underset((A))(2MnO_(2))+ 2OH^(-) + underset((D))(KIO_(3))`