Question

Carbon dioxide gas is given off as a waste product.
a) Is this chemical reaction endothermic or exothermic?
2 Lime (calcium oxide) is produced by heating limestone (calcium carbonate) in a hot kiln.​

Answer 1

b option is correct answer and plz don't forget to mark as me brainallist

Answer 2

Answer:

(a) endothermic reaction

2)When limestone is heated in a kiln, the calcium carbonate breaks down into calcium oxide and carbon dioxide. 

This type of reaction is called thermal decomposition.

CaCO3heat>CaO+CO2

As heat is absorbed in this reaction, it is endothermic reaction

HOPE IT HELPS:)