electrochemistry

Question: When $Mn{{O}_{2}}$ is fused with KOH, a coloured compound is formed, the product and its colour is



1) ${{K}_{2}}Mn{{O}_{4}}$, purple green
2) $KMn{{O}_{4}}$, purple
3) $M{{n}_{2}}{{O}_{3}}$, brown
4) $M{{n}_{3}}{{O}_{4}}$ black
Solution: Explanation: No Explanation
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