Why is bleaching powder useful for disinfecting water?
Answer and explanation
Correct answer: It can provide available chlorine
The governing concept is chemical disinfection by available chlorine. When bleaching powder is added to water, it releases chlorine-containing species that form hypochlorous acid in suitable conditions. These active chlorine species damage microorganisms and help kill disease-causing germs. Therefore option A correctly explains its use. Bleaching powder does not sweeten water, convert it into a metal, or freeze it; those choices are unrelated to its chemical action.
Frequently asked questions
What is the correct answer to this question?
It can provide available chlorine
Why is this the correct answer?
The governing concept is chemical disinfection by available chlorine. When bleaching powder is added to water, it releases chlorine-containing species that form hypochlorous acid in suitable conditions. These active chlorine species damage microorganisms and help kill disease-causing germs. Therefore option A correctly explains its use. Bleaching powder does not sweeten water, convert it into a metal, or freeze it; those choices are unrelated to its chemical action.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
