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Question

The gas liberated by heating potassium permanganate (KMnO4) is?

A
Hydrogen
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B
Oxygen
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C
Nitrogen
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D
Methane
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Solution

The correct option is B Oxygen
When potassium permanganate KMnO4 is heated, it results in the formation of potassium manganate, manganese oxide and oxygen gas.
2KMnO4K2MnO4+MnO2+O2

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