a)Iqbal treated a lustrous, diavalent element M with sodium hydroxide. he observed the formation of bubbles in the reaction mixture. He made the same observations when this element was treated with HCl. suggest how he can identify the produced gas and give the chemical equation for both the reactions. b) a metal carbonate X on reacting with an acid gives a gas wihch passed through solution Y gives the carbonate black. on the other hand, a gas G that is obtained at the anode during electrolysis of brine is passed on dry Y, it gives a compound Z, used for disinfecting water. identify X,Y.G and Z.