Question

Which gas is being produced during reaction in the test tube how does this gas react with calcium hydroxide lime water

Answer 1

Explanation:

carbon dioxide

Limewater reacts with carbon dioxide (CO2) in a two step process. Limewater is calcium hydroxide dissolved in water. So the milky appearance goes away as the insoluble CaCO3 reacts forming the soluble Ca(HCO3)2.