Question

Bleaching action of $CaOC{l}_2$ is due to

• A. nascent oxygen
• B. chlorine
• C. HClO
• D. HCl

Answer 1

Answer: (A)

In presence o f a slight amount o f dilute acid, bleaching powder $(CaOC{l}_2)$ loses its oxygen
$2CaOC{l}_2+H_{2}S{O}_4\to CaC{l}_2+CaS{O}_4+2HClOHClO\to HCl+[O]$
On account of the formation of nascent oxygen, bleaching powder shows bleaching properties Coloured matter $+[O]\to$ Colourless matter