What are the types of chemical reactions? Give examples to each.

Explanation

1) There are four types of chemical reaction. Those are
2) Chemical combination : A reaction in which single product is formed from we or more reactants is known as the chemical combination reaction.
`A+BrarrAB`
Eg. i) `2Mg+O_(2)rarr 2MgO" ii) "C+O_(2)rarr CO_(2)`
3) Decomposition reaction : A single substance decomposes to give two or more substances are called decomposition reaction.
`ABrarrA+B`
Eg : i) `CaCO_(3)rarrCaO+CO_(2)" ii) "2H_(2)Orarr H_(2)+O_(2)`
4) Displacement reaction : In a reaction when an element displaces another element from its compound is called displacement reaction.
`A+BCrarr AC+B`
Eg : i) `Zn+2HClrarrZnCl_(2)+H_(2)" ii) "Fe+CuSO_(4)rarr FeSO_(4)+Cu`
5) Double displacement reaction : If two reactants exchange their constituents chemically and form two products, then the reaction is called as double displacement reaction.
`AB+CD rarr AC+BD`
Eg : i) `Pb(NO_(3))+2KIrarr PbI_(2)+2KNO_(3)" ii) "Na_(2)SO_(4)+BaCl_(2)rarr BaSO_(4)+2NaCl`