What is the colour of the mass obtained when potassium permanganate is decomposed?

Pink

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Purple

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Green

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Black

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Solution

The correct option is D Black
Potassium permanganate, which is a purple crystalline solid, decomposed without fusing on heating to $240^{o} C$ , forming a black powder, consisting of a mixture of potassium manganate and manganese dioxide and oxygen.
$2 K M n O_{4} \to K_{2} M n O_{4} + M n O_{2} + O_{2}$

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When heated, potassium permanganate decomposes according to the following equation:

$2 K M n O_{4} \to K_{2} M n O_{4} + M n O_{2} + O_{2}$

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What is the colour of the mass obtained when potassium permanganate is decomposed?

The correct option is D BlackPotassium permanganate, which is a purple crystalline solid, decomposed without fusing on heating to 240oC, forming a black powder, consisting of a mixture of potassium manganate and manganese dioxide and oxygen. 2KMnO4→K2MnO4+MnO2+O2