Question

(i) Write the chemical equation to represent the action of atmospheric CO2 gas and bleaching powder when left exposed in open. (ii) State for what purpose bleachingpowder is used in water treatment plants. (iii) Why does bleaching powder smell of chlorine when exposed to air?

Answer 1

1.chemical equation between CO2 and bleaching powder
CaOCl2 + CO2 = CaCO3 + Cl2
2.Bleaching powder is used as disinfectant in water treatment plant
s that is to make water free from germs.
3.When exposed to air, bleaching powder gives a smell of chlorine. This is because bleaching powder reacts with carbon dioxide from the atmosphere to produce calcium carbonate and chlorine.

Answer 2

Caco3 is formed in the following reaction

CaOCl2 + CO2 = CaCO3 + Cl2

2. It is used as disinfectant in water to make water free from germs.

3.When bleaching powder is exposed to air, it gives a smell of chlorine because it reacts with co2 present in the atmosphere to produce calcium carbonate and chlorine.

Hope it helps