How can we identify the carbon dioxide gas

1.	How can we identify the carbon dioxide gas
Answer» On passing the evolved gas through lime water, if the limewater turns milky, then the gas is carbon dioxide.The reaction:CO2 + Ca (OH)2 = CaCO3 + H2O bring a burning splinter near the mouth of the test tube if it extinguishes with a pop sound ,the gas is hydrogen

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