A metal carbonate X on reacting with an acid gives a gas which when passed through a solution Y gives the carbonate back. On the other hand, a gas G that is obtained at anode during electrolysis of brine is passed on dry Y , it gives a compound Z, used for disinfecting drinking water. Identify X,Y, G and Z.

A metal carbonate X on reacting with an acid gives a gas which when pa

1.	A metal carbonate X on reacting with an acid gives a gas which when passed through a solution Y gives the carbonate back. On the other hand, a gas G that is obtained at anode during electrolysis of brine is passed on dry Y , it gives a compound Z, used for disinfecting drinking water. Identify X,Y, G and Z.
Answer» Solution :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 bleaching powder (Z) used for disinfecting drinking water. `underset("Slaked lime")(Ca(OH)_2)+Cl_(2)rarrunderset("Bleaching powder")(CaOCl_2)+H_(2)O` SINCE Y and Z are CALCIUM salts , therefore X is also a calcium salt and is calcium carbonate. `CaCO_3+2HCl rarr CaCl_(2) + CO_(2)+H_(2)O` `Ca(OH)_2+CO_(2) rarrCaCO_(3)+H_(2)O` .