When \( \mathrm{MnO}_{2} \) is fused with \( \mathrm{KOH} \), a col...

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When \( \mathrm{MnO}_{2} \) is fused with \( \mathrm{KOH} \), a coloured compound
P is formed, the product and its colour is -

W
(1) \( \mathrm{K}_{2} \mathrm{MnO}_{4} \), green
(2) \( \mathrm{KMnO}_{4} \), purple
(3) \( \mathrm{Mn}_{2} \mathrm{O}_{3} \), brown
(4) \( \mathrm{Mn}_{3} \mathrm{O}_{4} \), black
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