Question

Carbon dioxide is released on heating lime stone ore in metallurgy this is called

Answer 1

The reaction in which carbon dioxide is released on heating lime stone ore in metallurgy is called Thermal decomposition.

In thermal decomposition calcium carbonate (CaCO3) is heated to form calcium oxide (CaO) and carbon dioxide.

Calcium oxide is also called as Unslaked lime or quick lime.

Thus formed unslaked lime in yellow in colour when it is hot and white when cooled.

Answer 2

Lime stone chemical name is calcium carbonate .

Calcination is the process in which carbonate ore is heated strongly in absence of air to convert it into metal oxide .

For example :

Calcium is very reactive metal so it exists in earth crust in combined state as CaCO3.

In order to convert it into metal oxide we use calcination process.

                    heat

CaCO3(s)---------------> CaO(s) +CO2(g)