Which substance is mainly used to prepare bleaching powder?
Answer and explanation
Correct answer: Dry slaked lime and chlorine
Bleaching powder is prepared by passing chlorine gas over dry slaked lime, whose chemical name is calcium hydroxide, Ca(OH)₂. The reaction produces bleaching powder, commonly represented as calcium oxychloride, along with water. Therefore, option A is correct. Sodium chloride and water, sodium carbonate with acid, and gypsum with water are not the standard reactants for this preparation.
Frequently asked questions
What is the correct answer to this question?
Dry slaked lime and chlorine
Why is this the correct answer?
Bleaching powder is prepared by passing chlorine gas over dry slaked lime, whose chemical name is calcium hydroxide, Ca(OH)₂. The reaction produces bleaching powder, commonly represented as calcium oxychloride, along with water. Therefore, option A is correct. Sodium chloride and water, sodium carbonate with acid, and gypsum with water are not the standard reactants for this preparation.
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.
