Why is bleaching powder useful for disinfecting water?
Answer and explanation
Correct answer: It can provide available chlorine
Bleaching powder is useful for water disinfection because it releases available chlorine when it reacts with water. This chlorine forms oxidising substances, including hypochlorous acid, which damage and kill many disease-causing microorganisms. It does not sweeten water, convert water into a metal, or freeze it. Therefore option A correctly states the reason.
Frequently asked questions
What is the correct answer to this question?
It can provide available chlorine
Why is this the correct answer?
Bleaching powder is useful for water disinfection because it releases available chlorine when it reacts with water. This chlorine forms oxidising substances, including hypochlorous acid, which damage and kill many disease-causing microorganisms. It does not sweeten water, convert water into a metal, or freeze it. Therefore option A correctly states the reason.
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.
