How is the gas in the test tube tested
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When we take a burning matchstick near the test tube ,
if you hear a pop sound then it is hydrogen,
if it burns brighter then it will be oxygen
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Place a glowing splint in the test tube, and if it reignites, it could be oxygen. Place a burning splint into a test tube, and if it goes out, it could be carbon dioxide. Or, place carbon dioxide gas in limewater, and if it turns milky and gets chunks, it is carbon dioxide.
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