Question

Bleaching powder gets its disinfectant property from the chlorine gas evolved during its decomposition.

• A. True
• B. False

Answer 1

The correct option is A True

Bleaching powder (${\text{CaOCl}}_2$) undergoes decomposition due to the carbon dioxide in air to release chlorine gas along with calcium carbonate. The reaction involved is given below:

${\text{CaOCl}}_2\text{(s)}+{\text{CO}}_2\text{(g )}\to {\text{CaCO}}_3\text{(s)}+{\text{Cl}}_2\text{(g )}\uparrow$

The released chlorine gas provides the disinfecting property to the bleaching powder.