Why is bleaching powder useful for disinfecting water?
Answer and explanation
Correct answer: It can provide available chlorine
The governing concept is disinfection by available chlorine. When bleaching powder is added to water, it releases chlorine-containing species that produce available chlorine, including hypochlorous acid under suitable conditions. These oxidising substances damage or kill many disease-causing microorganisms. Therefore option A is correct; sweetness, metal formation, and freezing are unrelated to the disinfecting 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 disinfection by available chlorine. When bleaching powder is added to water, it releases chlorine-containing species that produce available chlorine, including hypochlorous acid under suitable conditions. These oxidising substances damage or kill many disease-causing microorganisms. Therefore option A is correct; sweetness, metal formation, and freezing are unrelated to the disinfecting 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.
