Question

Bleaching powder form a milky solution in water ,write it with chemical reaction

Answer 1

when bleaching powder is mixed in water,it reacts with carbon dioxide from air to form calcium carbonate which gives milkiness to the solution

Or
The chemical formula of bleaching powder is CaOCl2 and its chemical name is calcium oxychloride. The following reaction involves its preparation I.e..Passing Cl2 over slaked lime.

Answer 2

When bleaching powder is mixed in water, it reacts with water and carbon dioxide from the air, to form calcium carbonate which imparts milkiness to the solution

CaOCl2 + H2O ---------> Ca (OH)2+ 2HCl