To prepare bleaching powder, chlorine is passed over which substance?
Answer and explanation
Correct answer: Dry slaked lime
The standard preparation of bleaching powder involves passing chlorine over dry slaked lime, whose chemical formula is Ca(OH)₂. Dry conditions are specified because moisture can interfere with the desired preparation. Common salt is a raw material for producing chlorine industrially, but it is not the substance over which chlorine is passed here. Thus option A is correct.
Frequently asked questions
What is the correct answer to this question?
Dry slaked lime
Why is this the correct answer?
The standard preparation of bleaching powder involves passing chlorine over dry slaked lime, whose chemical formula is Ca(OH)₂. Dry conditions are specified because moisture can interfere with the desired preparation. Common salt is a raw material for producing chlorine industrially, but it is not the substance over which chlorine is passed here. Thus option A is correct.
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.
