What is a decomposition reaction? Give an example of a decomposition reaction. Describe an activity to illustrate such a reaction by heating.

Decomposition reaction is a reaction where the compounds break down or splits into two or more products. They are classified into three. Thermal decomposition, electrolytic decomposition and photo decomposition reaction

There are so many examples for decomposition reactions one of them is decomposition of calcium carbonate into calcium oxide and carbon dioxide when heated

Decomposition reaction by heating is called Thermal decomposition reaction. Here is an example for that kind of reaction

2KClO3(s) + Heat → 2KCl + 3O2

Potassium chromate decomposes into potassium chloride and oxygen gas is evolved.