Question

Explain
with the
the types of chemical reactions
help of suitable
example​

Answer 1

Explanation:

Chemical reactions can be classified in following types:

Combination Reaction

Decomposition Reaction

Displacement Reaction

Double Displacement Reaction

Oxidation and Reduction Reaction

Combination Reaction: Reactions in which two or more reactants combine to form one product are called COMBINATION REACTION.

A general combination reaction can be represented by the chemical equation given here.

A + B ⇨ AB

Decomposition Reaction: Reactions in which one compound decomposes in two or more compounds or element are known as DECOMPOSITION REACTION. Decomposition reaction is just opposite of combination reaction.

A general decomposition reaction can be represented as follows:

AB ⇨ A + B

Example: When calcium carbonate is heated, it decomposes into calcium oxide and carbon dioxide

CaCO3 ⇨ CaO + CO2

Electrolytic Decomposition:

Reactions in which compounds decompose into simpler compounds because of passage of electricity, are known as ELECTROLYTIC DECOMPOSITION. This is also known as ELECTROLYSIS.

Example: When electricity is passed in water, it decomposes into hydrogen and oxygen.

2H2O ⇨ 2H2 + O2

Photolysis or Photo Decomposition Reaction:

Reactions in which a compound decomposes because of sunlight are known as PHOTOLYSIS or PHOTO DECOMPOSITION REACTION.

Example: When silver chloride is put in sunlight, it decomposes into silver metal and chlorine gas.

2AgCl ⇨ 2Ag + Cl2

Displacement Reaction

Reactions in which atoms or ions move from one compound to other to form new compound are known as DISPLACEMENT REACTION.

Example: When zinc reacts with hydrochloric acid, it gives hydrogen gas and zinc chloride.

Zn + 2HCl ⇨ ZnCl2 + H2