Question

explain the types of chemical reactions

Answer 1

$\bf\huge\mathfrak{Answer}$

There are mainly 5 types of Chemical Reactions.

1) Combination Reaction

Combination reactions are those reactions in which two or more substances combine with each other to form a new single substance.

Example - 1)Mg + O2 -> MgO

2) H2 + O2 -> H2O

2) Decomposition reactions

Decomposition reactions are those reactions in which a compound splits up into two or more simpler substances.

Example - 1) CaCO3 -> CaO + CO2

2) H2O -> H2 + O2

3) Displacement Reactions

Displacement reactions are those reactions in which one element displaces another element in a compound.

Example - CuSO4 + Zn -> ZnSO4 + Cu

Here, Zinc displaces Copper since Zinc is more reactive that copper.

4) Double Displacement Reaction

Those reactions in which two compounds react by an exchange of ions to form two new compounds are known as Double Displacement reactions.

Example - 1)AgNO3 + NaCl -> AgCl + NaNO3

2) NaOH + HCL -> NaCL + H2O

5) Redox Reactions

Redox reactions are those type of reactions which involves transfer of electrons by gaining or losing an electron. It involves both Oxidation and Reduction in chemical reaction.

Example - Cu + AgNO3 -> Cu(NO3)2 + Ag

It's a double displacement reaction and also a redox reaction. Copper gets oxidized in this case and Silver gets reduced.

Answer 2

Answer:

Basically, There are total 9 types of the chemical reactions.

1. Combination reaction

When 2 or more reactants combine in a reaction to form a single product, it is called as Combination reaction.

Example

2Mg + O2 ==> 2MgO

2. Decomposition reaction

The chemical reactions in which two or more products are formed from a single reactant is called a decomposition reaction.

Example

CaCO3 ==> CaO + CO2

3. Displacement reaction

The reaction in which the place of ion of a less reactive element in a compound is taken by another more reactive element by formation of its own Ion is called a displacement reaction.

Example

CuSO4 + Zn ==> ZnSO4 + Cu

4. Double Displacement reaction

The reactions in which the ion in the reactants are exchanged to form a precipitate are called double displacement reactions .

Example

AgNO3 + NaCl ==> AgCl + NaNO3

5. Endothermic Reaction

The chemical reactions which are accompanied by absorption of heat are called endothermic reactions.

Example

CaCO3 + Heat ==> CaO + CO2

6. Exothermic reaction

The chemical reactions which are accompanied by evolution of heat are called Exothermic reaction.

Example

CaO + H2O ==> Ca(OH)2 + Heat

7. Reduction Reaction

The chemical reaction in which hydrogen is gained and oxygen is losed is called as Reduction Reaction.

Example

C + 2H2 ==> CH4

8. Oxidation Reaction

The chemical reaction in which a reactant combines with oxygen or loses hydrogen is called as Oxidation Reaction.

Example

MgH2 ==> Mg + H2

9. Redox Reaction

The chemical reaction in which both reduction and oxidation reaction takes place simultaneously is called Redox Reaction.

Example

CuO + H2 ==> Cu + H2O

These are the types of reactions.