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, gives a compound Z, Z is 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, gives a compound Z, Z is 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) products bleaching powder (Z) used for disinfecting DRINKING water. `underset("Slaked lime")(Ca(OH)_(2)) + Cl_(2) rarr underset("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) rarr CaCO_(3) + H_(2)O`