Question

What is bleaching powder chemically called? Give reaction involved in its preparation. State one of its uses.

Answer 1

• Bleaching powder is chemically called $\text{calcium oxychloride}$ with the formula $CaOC{l}_2.$
• $Preparation:$ When Chlorine gas is passed through dry slaked lime, it forms bleaching powder.

$Reaction:$

$Ca(OH{)}_2+C{l}_2\to CaOC{l}_2+H_{2}O$

• $Use:$ Bleaching powder is used for disinfecting drinking water due to the Chlorine liberated which kills the germs.