Question

Give an example of a decomposition reaction.

Answer 1

When calcium carbonate is heated, it decomposes to give calcium oxide and carbon dioxide:

\[\ce{\underset{(Limestone)}{\underset{Calcium carbonate}{CaCO3_{(s)}}} ->[Heat][(Decomposition)] \underset{(Lime)}{\underset{Calcium oxide}{CaO_{(s)}}} + \underset{Carbon dioxide}{CO2_{(g)}}}\]