Which gas is used to prepare bleaching powder?
Answer and explanation
Correct answer: Chlorine
Bleaching powder is prepared by passing chlorine gas over dry slaked lime, which is calcium hydroxide. The reaction produces bleaching powder containing available chlorine, so chlorine is the required reactant. Hydrogen and nitrogen do not form bleaching powder, while carbon dioxide is not the bleaching or disinfecting gas involved in this preparation. Therefore, option B is correct.
Frequently asked questions
What is the correct answer to this question?
Chlorine
Why is this the correct answer?
Bleaching powder is prepared by passing chlorine gas over dry slaked lime, which is calcium hydroxide. The reaction produces bleaching powder containing available chlorine, so chlorine is the required reactant. Hydrogen and nitrogen do not form bleaching powder, while carbon dioxide is not the bleaching or disinfecting gas involved in this preparation. Therefore, option B 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.
