Question

Bleaching Powder is formed from

• A. Slaked lime + HCl
• B. Slaked lime + Cl₂
• C. Quick lime + HCl
• D. Quick lime + CO₂

Answer 1

The Correct Option is B

To solve the problem, we need to identify the correct reagents that form bleaching powder.

1. Composition of Bleaching Powder:
Bleaching powder is a chemical compound with the formula \( \text{Ca(OCl)_2} \). It is formed by the reaction of slaked lime (calcium hydroxide) with chlorine gas.

2. Analyzing the Options:

- Option (1): Slaked lime + HCl — This reaction produces calcium chloride and water, but not bleaching powder.
- Option (2): Slaked lime + Cl₂ — This is the correct reaction. Slaked lime reacts with chlorine gas to produce bleaching powder.
- Option (3): Quick lime + HCl — This reaction forms calcium chloride and water, not bleaching powder.
- Option (4): Quick lime + CO₂ — This reaction forms calcium carbonate, not bleaching powder.

Final Answer:
Bleaching powder is formed from Slaked lime + Cl₂ (Option B).