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 comes into contact with water, it releases chlorine or chlorine-containing species that form hypochlorous acid. These reactive species damage and kill many disease-causing microorganisms. The effect is not related to sweetness, conversion into a metal, or freezing, so option A correctly explains its use.
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 comes into contact with water, it releases chlorine or chlorine-containing species that form hypochlorous acid. These reactive species damage and kill many disease-causing microorganisms. The effect is not related to sweetness, conversion into a metal, or freezing, so option A correctly explains its use.
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.
