A metal carbonate x on reacting with an acid gives gas which when passed through a solution gives the carbonate back.Identify X and that gas.
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The gas evolved at anode during electrolysis of brine is chlorine (G) When chlorine gas is passed through dry Ca(OH)2 (Y) produces bleaching powder (Z) used for disinfecting drinking water.
Ca(OH)2 + Cl2 ------> CaOCl2 + H2O
Since Y and Z are calcium salts, therefore X is also a calcium salt and is calcium carbonate.
CaCO3 + 2HCl -------> CaCl2 + CO2 + H2O Ca(OH)2 + CO2 ---------à CaCO3 + H2O
Ca(OH)2 + Cl2 ------> CaOCl2 + H2O
Since Y and Z are calcium salts, therefore X is also a calcium salt and is calcium carbonate.
CaCO3 + 2HCl -------> CaCl2 + CO2 + H2O Ca(OH)2 + CO2 ---------à CaCO3 + H2O
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