When an oxide of manganese (A) is fused with KOH in the presence of an oxidising agent and dissolved in water, it gives a dark green solution of compound (8). Compound (8) disproportionates in neutral or acidic solution to give purple compound (C). An alkaline solirtion of compound (C) oxidises potassium iodide solution to a compound (D) and compound (A) is also formed. Identify compounds A to D and also explain the reactions involved.
Thinking Process
This problem based on the concept of preparation and properties of potassium permanganate.
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