Question

what type of reaction are presented by following CaCO3 CaO+CO2

Answer 1

I think it's should be Combination reaction....
Hope this will help you.... ✌

Answer 2

Decomposition: A substance breaks down to smaller species. [e.g. CaCO3(s) → CaO(s) + CO2(g)Decomposition of limestone to calcium oxide (quicklime) and carbon dioxide on heating.]
HOPE YOU UNDERSTAND