Preparation of potassium permanganate from involves two step process in which the 1st step is a reaction with KOH and to produce:

(a) \quad (b) \quad (c) \quad (d)

Question

Preparation of potassium permanganate from  involves two step process in which the 1st step is a reaction with KOH and  to produce:

(a)  \quad (b)  \quad (c)  \quad (d)

Canvas Classes · Accepted Answer

Preparation of KMnO₄ from MnO₂ — two steps:

Step 1 — Fusion with KOH and KNO₃:

- MnO₂ (Mn = +4) is oxidised to K₂MnO₄ (Mn = +6)
- KNO₃ acts as the oxidising agent
- Product: potassium manganate  (green)

Step 2 — Oxidation/disproportionation:

or electrolytic oxidation:

Answer: (d) K₂MnO₄

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