Question

What is formed when chlorine gas is passed through slaked lime?

• A. Mohr's salt
• B. Zinc
• C. Plaster of Paris
• D. Bleaching powder

Hint:

Bleaching powder is widely used for bleaching and disinfection due to its oxidizing properties.

Answer 1

The Correct Option is D

When chlorine gas is passed through slaked lime (Ca(OH)$_2$), it reacts to form bleaching powder (Ca(OCl)$_2$). This is a common reaction used in the production of bleaching powder. The chemical reaction is: \[ \text{Ca(OH)}_2 + \text{Cl}_2 \rightarrow \text{Ca(OCl)}_2 + \text{H}_2\text{O} \]