An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms an oxide which on treatment with water gives back B. Identify A, B and C and give the reactions involved.
A is calcium. It reacts with water to give calcium hydroxide. B is calcium hydroxide and is used for white washing. C is calcium oxide. The reactions are as follows: Ca+2H2O→Ca(OH)2+H2 Ca(OH)2→CaO+H2O CaO+H2O→Ca(OH)2
