Question

write the formula of bleaching power and how it can be perepared write its two uses

Answer 1

caocl2

it is prepared when chlorine gas is passed over slake lime ca(oh)2

its uses is to bleack clothes and as it has presence of cl so it can be disinfectent in pools or water

Answer 2

The chemical name of bleaching powder is calcium oxychloride and its chemical formula is CaOCl2. 
Uses of Bleacing Powder

It is used

(i) as a disinfectant and germicide especially in the sterilization of drinking water.

(ii) for manufacture of chloroform.

(iii) for making wool unshrinkable.

(iv) as an oxidising agent in industry.

(v) mainly as bleaching agent for cotton, linen and wood pulp.

However, delicate articles like straw, silk, ivory, etc., are not bleached by bleaching powder.