Question

Bleaching powder is effective with cold water, but ineffective with hot water. This is because of:

• A. oxidation of chloride radical
• B. reduction of chloride radical
• C. reduction of hypochlorite radical
• D. hydrolysis of hypochlorite radical

Answer 1

Answer: (C)

reduction of hypochlorite radical

Bleaching action takes place due to the hypochlorite radical [$Cl{O}^{-}$].

But when used in hot water, hot water favours reduction of the hypochlorite radical as a result of which bleaching powder is ineffective with hot water.

Generally, Bleaching powder is used as a disinfectant widely.