The correct answer is C. Bleaching powder.
Baking powder is a leavening agent used in baking. It is a mixture of baking soda, cream of tartar, and sometimes cornstarch. Baking soda is a base, while cream of tartar is an acid. When these two ingredients are combined, they react to produce carbon dioxide gas. This gas is what causes baked goods to rise.
Bleaching powder is a white, crystalline solid that is used to bleach fabrics and paper. It is also used to disinfect water and to kill bacteria. Bleaching powder is made by combining chlorine gas with calcium hydroxide.
Washing soda is a white, crystalline solid that is used in laundry detergents and other cleaning products. It is also used to make glass and paper. Washing soda is made by combining sodium carbonate with water.
Chlorine gas is a greenish-yellow gas that is used in a variety of industrial processes. It is also used as a disinfectant and a bleaching agent. Chlorine gas is made by combining chlorine and hydrogen.
In conclusion, chlorine gas is used in the manufacture of bleaching powder.