Question

what type of chemical reaction takes place when limestone is heated?

Answer 1

The chemical reaction that takes place when limestone is heated is

CaCo3  CaO + CO2.

Decomposition takes place when limestone is heated strongly.

This reaction helps in forming calcium oxide (CaO) and carbon dioxide (CO2).

Therefore, the word equation will be Calcium Carbonate

 Calcium oxide + carbon dioxide This process is known as decomposition.

Answer 2

1 this is decomposition reaction
2. when limestone heated then two reactant is obtain i.e ca and co2
3. DEFINITION = when two or more reactant is obtain by single compound then this reaction is called decomposition reaction.

EXPLANATION
caco3 = ca +co3