Question

The chemical formula of bleaching powder is

• A. CaO
• B. CaCl$_2$
• C. CaOCl
• D. CaOCl$_2$

Hint:

Bleaching powder is also called calcium oxychloride and is widely used for purification and disinfection.

Answer 1

The Correct Option is D

Step 1: Preparation: 
Bleaching powder is produced by passing chlorine gas over dry slaked lime (Ca(OH)$_2$): \[ Ca(OH)_2 + Cl_2 \rightarrow CaOCl_2 + H_2O \] Step 2: Chemical Identity: 
The compound formed is calcium oxychloride, whose formula is CaOCl$_2$. 
Step 3: Uses: 
Used for bleaching cotton and paper. 
Used as a disinfectant in water treatment. 
Used as an oxidizing agent in industries. 
Step 4: Final Answer: 
The chemical formula of bleaching powder is CaOCl$_2$.