6 Types of Reaction in Chemistry With Examples

6 Types of Reaction in Chemistry With Examples

Chemical reactions are an important part of our lives. Today chemical reactions are contributing to various human activities that we encounter every day, from cooking food to taking a bath. Everything in this natural world is composed of different chemical reactions that we are going to discuss here. 

To understand the types of chemical reactions, you must have some basic knowledge of elements and how do they react. So for that check out the link below:

Facts on Periodic Table of Elements

What Are the 5 Postulates of Dalton’s Atomic Theory

Now let’s see different types of chemical reaction in chemistry:

Combination Reaction

Two or more than two compound molecules combine to form one compound molecule. 


X + Y → XY

There are three types of combination reaction:

  • Between two elements

For example, C+ O2 → CO2

  • Between two compounds

For example, CaO + H2O → Ca(OH)2

  • Between a compound and an element

For example, O + H2O → H2O2

Decomposition Reaction

Opposite to combination reaction, the complex molecules break down into simpler molecules


XY → X + Y

Have you ever noticed hydrogen peroxide? It is commonly used as a disinfectant to protect cuts and scratches from bacterial infection. Generally, it is kept in the dark rooms since, in sunlight, it undergoes a chemical reaction. In the daylight, hydrogen peroxide breaks down into water and oxygen. This process is a decomposition reaction. 

Neutralization Reaction

Acid and base react with each other to form salt and water; it is known as neutralization reaction. 


Acid + Base → Salt + water

The term salt here defines the ionic compound that can be either soluble or insoluble. The neutralization reaction is the type of chemical reaction in chemistry that can proceed even if one reactant is not in the aqueous phase. For example,

3 HCl (aq) + Fe(OH)2(s) → 3 H2O (l) + FeCl3 (aq)

Precipitation Reaction

Two solutions of soluble salts mixed to form a precipitate. The precipitation reaction is defined as “Chemical reaction occurring in aqueous solutions where two iconic bonds combine forming up insoluble salts.” From the precipitation reactions, we get salts as precipitates or products of precipitates. 


X + Soluble Salt Y → Precipitate + Soluble Salt C

Combustion Reaction

Oxygen combines with carbon and water molecules and releases heat. The combustion reactions are high-temperature exothermic types of chemical reactions in chemistry.  


X + O2 → CO2 + H2O + Heat

For example, combustion of Methane

CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g)

Displacement Reaction

One element takes the place of another element in the reaction. The displacement reaction occurs only when the metal of electrochemical series mixed with the ions of lower metal in the electrochemical series. The reaction is of two types double displacement reaction and single displacement reaction. 


X + YZ → XZ + Y

Single Displacement 

Cl2 (aq) + 2 NaBr (aq) → 2 NaCl (aq) + Br2 (aq)

Double Displacement 

BaCl2 (aq) + Na2So4 (aq) → BaSO4 (s) + 2 NaCl (aq)

So these were some types of chemical reactions in chemistry that we observe in our daily life. If you still have queries or want to know more about it, take instant Chemistry assignment help from our experts.