question_answer

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

                  X is calcium carbonate                     (1)                       Y is slaked lime                                 (1)                                 G is chlorine                                            (1) Z is bleaching powder                   (1) The equations involved are (i) (ii) (iii) (iv)