Why is bleaching powder useful for disinfecting water?
Answer and explanation
Correct answer: It releases substances with a disinfecting effect
Bleaching powder, commonly represented as calcium oxychloride, is useful in water treatment because it releases chlorine or hypochlorous substances in the presence of moisture. These powerful oxidising species damage and kill many disease-causing microorganisms, reducing contamination. Therefore option A correctly states its disinfecting action. It does not sweeten water, convert water into a metal, or transform it into oil; options B, C, and D have no chemical basis.
Frequently asked questions
What is the correct answer to this question?
It releases substances with a disinfecting effect
Why is this the correct answer?
Bleaching powder, commonly represented as calcium oxychloride, is useful in water treatment because it releases chlorine or hypochlorous substances in the presence of moisture. These powerful oxidising species damage and kill many disease-causing microorganisms, reducing contamination. Therefore option A correctly states its disinfecting action. It does not sweeten water, convert water into a metal, or transform it into oil; options B, C, and D have no chemical basis.
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.
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