Correct option is B
Calcination is the process of heating a substance to a high temperature in the presence of air or oxygen. When limestone (calcium carbonate, CaCO₃) is heated in the presence of air, it undergoes a chemical transformation known as
thermal decomposition. The limestone is heated to about 900°C to 1000°C, causing it to break down into lime (calcium oxide, CaO) and carbon dioxide gas (CO₂) according to the following reaction:
CaCO₃ (s)→CaO (s)+CO₂ (g)
This process is essential in the production of lime, which is used in various industrial applications such as in steel making, water treatment, and construction.
