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When potassium permaganate is heated str...

When potassium permaganate is heated strongly, oxygen gas is liberated.
a) Suggest a method to identify oxygen gas?
b) Give any other method to prepare oxygen gas.
c) Write down the chemical equation of the reaction of carbon and sulphur with oxygen.

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a) Flaring up of the glowing splinter indicates the presence of oxygen gas.
b) BY the electrolysis of water.
c) .C+O_2 rarr CO_2.
.S+O_2 rarr SO_2.
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