Question

A metal carbonate X on heating with an acid gives an gas which when passed through a solution Y gives the carbonate again. 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 1

X is calcium carbonate.
Y is slaked lime i.e. calcium hydroxide.
G is chlorine gas as it is obtained at positive electrode.
Z is calcium oxychloride.

Answer 2

X is calcium carbonate.

Y is slaked lime i.e. calcium hydroxide.

G is chlorine gas as it is obtained at positive electrode.

Z is calcium oxychloride.