During a chemical reaction, the substances that react are known as reactants whereas the substances that are formed during a chemical reaction are known as products. Six common types of chemical reactionsare discussed below.

Types of Chemical ReactionsExplanationGeneral ReactionCombination reactionTwo or more compounds combine to form one compound.A + B → ABDecomposition reactionThe opposite of a combination reaction – a complex molecule breaks down to make simpler ones.AB → A + BPrecipitation reactionTwo solutions of soluble salts are mixed resulting in an insoluble solid (precipitate) forming.A + Soluble salt B  → Precipitate + soluble salt CNeutralization reactionAn acid and a base react with each other. Generally, the product of this reaction is a salt and water.Acid + Base → Salt + WaterCombustion reactionOxygen combines with a compound to form carbon dioxide and water. These reactions are exothermic, meaning they give off heat.A + O2 → H2O + CO2Displacement reactionOne element takes place with another element in the compound.A + BC → AC + B

Combination reaction :- one or more reactant react to form one product

eg. H2 + CL2 gives 2HCL

Decomposition Reaction :- one reactant decompose in two or more products

eg. 2H2O gives H2 +O2

Displacement reaction :- high reactive element displaces less reactive element

eg. CuSo4 + Fe gives FeSo4 + Cu


Double displacement reaction :- elements interchange their ions during reaction

eg. NaSO4 + Bacl gives BaSO4 +Nacl


Here, in above reaction insoluble substance is Formed which is called precipitate
and substance is BaSO4 white precipitate and this type of reaction is also called perception reaction


Redox Reaction

Reaction in which oxidation and Reduction Both occurs

=> oxidation :- element gains oxygen or loses hydrogen
=> reduction :- element loses oxygen or gains hydrogen

eg. Zn + CuSO4 gives ZuSO4 + Cu