Question

A solution of a substance ‘X’ is used for testing CO2. Identify ‘X’. What will be its reaction with CO2 ? Write balanced chemical equation for the reaction.

Answer 1

The solution is Ca(OH)2 solution

Here, X is lime.

Ca(OH)2 + CO2 -----------> CaCO3 (⬇️) + H2O

If the gas is CO2 , lime water will turn milky.