Why is bleaching powder used for disinfecting drinking water?
Answer and explanation
Correct answer: It can provide available chlorine
Bleaching powder is a chlorine-containing compound, commonly represented as calcium oxychloride. In moist water it releases available chlorine, which forms disinfecting chlorine species that damage or kill many disease-causing microorganisms. Hence option A gives the scientific reason for its use in water treatment. It does not convert water into sugar, produce calcium metal, or merely change the colour; disinfection is the essential function.
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 a chlorine-containing compound, commonly represented as calcium oxychloride. In moist water it releases available chlorine, which forms disinfecting chlorine species that damage or kill many disease-causing microorganisms. Hence option A gives the scientific reason for its use in water treatment. It does not convert water into sugar, produce calcium metal, or merely change the colour; disinfection is the essential function.
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.
