Which of the following is formed by the action of chlorine on dry slaked lime?

Correct option is D

The correct answer is (D) Bleaching powder.

Explanation:

• When chlorine gas reacts with dry slaked lime (chemically known as calcium hydroxide, Ca(OH)₂), the product formed is bleaching powder, chemically called calcium oxychloride (CaOCl₂).

Chemical Reaction:

Ca(OH)₂+Cl₂→CaOCl₂+H₂O

This reaction takes place in a dry environment where slaked lime is exposed to chlorine gas.

Uses of Bleaching Powder:

1. Disinfectant: Used for disinfecting drinking water.
2. Bleaching Agent: Used in the textile and paper industries.
3. Oxidizing Agent: Used in various chemical processes.

Why Other Options are Incorrect:

• Calcium Oxide: Calcium oxide (quicklime) is formed by heating limestone, not by the reaction of chlorine with slaked lime.
• Hydrochloric Acid: Hydrochloric acid (HCl) is not formed in this reaction.
• Calcium Chloride: Calcium chloride (CaCl₂) is not the product of this reaction; it forms in other reactions involving calcium compounds.