The correct answer is (c), washing soda.
Baking powder is a leavening agent used in baking. It is a mixture of sodium bicarbonate (baking soda) and an acidic substance, such as cream of tartar. When baking powder is added to dough, the acid reacts with the baking soda to produce carbon dioxide gas. This gas bubbles up and causes the dough to rise.
Caustic soda is a strong alkali with the chemical formula NaOH. It is also known as sodium hydroxide or lye. Caustic soda is a highly corrosive substance that can cause severe burns if it comes into contact with skin or eyes. It is used in a variety of industrial processes, including the manufacture of paper, soap, and detergents.
Bleaching soda is a white, crystalline solid with the chemical formula Na2CO3. It is also known as sodium carbonate or washing soda. Bleaching soda is a mild alkali that is used in a variety of household and industrial applications. It is used to clean and deodorize, and it is also used in the manufacture of paper, glass, and soap.
In conclusion, the common name of sodium carbonate is washing soda.