Answers

2015-08-31T12:40:08+05:30
It can be tested by introducing a glowing wooden splinter to the gas formed. If the glowing splinter gets relighted, then the gas is oxygen. It is because oxygen is a supporter of combustion.
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2015-08-31T12:49:52+05:30
It can be tested by bringing a burning candle near the gas evolved. if the candle glows with the blue and yellow flame then it surely oxygen
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