Question

Raw materials used in the manufacture of bleaching powder are :

• A. lime stone and chlorine
• B. quick lime and chlorine
• C. dry slaked lime and $HCl$
• D. dry slaked lime and chlorine

Answer 1

The correct option is D dry slaked lime and chlorine

Chlorine is produced during the electrolysis of aqueous sodium chloride (brine). This chlorine gas is used for the manufacture of bleaching powder. Bleaching powder is produced by the action of chlorine on dry slaked lime [$Ca(OH{)}_2$].

The reaction involved is:-

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

Thus, option $D$ is correct.