Which gas is used for the manufacturing of Bleaching Powder?

Chlorine gas

The correct answer is option 2. Chlorine gas.

The gas used for the manufacturing of Bleaching Powder is Chlorine gas.

Chlorine gas \((Cl_2)\) is commonly used in the manufacturing process of Bleaching Powder (calcium hypochlorite). Chlorine gas reacts with calcium hydroxide to produce calcium hypochlorite, which is the main component of Bleaching Powder. This compound is widely used as a bleaching agent, disinfectant, and for water treatment purposes.