GEOLOGY

Detailed explanation-1: -What is Calcium Carbonate? Calcium carbonate is an inorganic chemical compound with the chemical formula CaCO3. Calcium carbonate is one of the most popular chemicals which is first encountered in school classrooms, where the use of chalk (a form of CaCO3) is found.

Detailed explanation-2: -Calcium carbonate is a chemical compound with the formula CaCO3 formed by three main elements: carbon, oxygen, and calcium.

Detailed explanation-3: -[e.g. CaCO3(s) → CaO(s) + CO2(g) Decomposition of limestone to calcium oxide (quicklime) and carbon dioxide on heating.]

Detailed explanation-4: -CaO(s) + CO2(g) → CaCO3(s) However, above about 1200 K the opposite reaction occurs, calcium carbonate decomposes to form calcium oxide and gives off carbon dioxide. This is what happens in lime kilns where limestone (calcium carbonate) is heated to form lime (calcium oxide).