# Explain, giving one example of the following chemical change: Thermal decomposition - Chemistry

Explain, giving one example of the following chemical change:

Thermal decomposition

#### Solution

A decomposition reaction brought about by heat is known as thermal decomposition.
Thermal decomposition is a chemical reaction where a single substance breaks into two or more simple substances when heated.
$\ce{CaCO3->[Heat]CaO + CO2}$

Concept: Types of Chemical Change or Chemical Reaction
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#### APPEARS IN

Selina Concise Science Chemistry 1 Class 9 ICSE
Chapter 2 Chemical Changes and Reactions
Exercise 2 (B) | Q 3.2 | Page 29