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CGP EDU Academic Team
Published on: August 12, 2026
Why KMnO 4 is stored in dark bottle and what happens to it's acidic solution ?
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MnO 4 – solutions are intrinsically unstable in acidic solutions and decompose slowly. This decomposition is catalysed by sun light. This is the Statement-2 for which KMnO 4 solution is kept in dark bottles.
4MnO 4 – + 4H + 
4MnO 2 + 3O 2 + 2H 2 O
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