Types of Chemical Reaction
There are total five types of chemical reaction.
- Synthesis
- Combustion
- Decomposition
- Single displacement
- Double displacement
Synthesis:
Synthesis means one or two simpler compound reacts to form a more complicated compound. In short two simple reactants reacts to form a complex product is called as synthesis.
Example: Hydrogen reacts with oxygen to form water and with chloride to form hydrochloric acid
2H2 + O2 → 2H2O
2H2 + Cl2 → 2HCl
Combustion:
Combustion is a process where oxygen reacts with compound to form water and carbon dioxide. In this reaction heat is generated so it is called as exothermic reaction.
Example: Methane reacts with oxygen to form carbon dioxide and water.
CH4 + 2O2 → CO2 + 2H2O
Decomposition:
Decomposition means a complex molecule breaks down in a single compound where energy is required to break the molecule so it is called as endothermic reaction.
Example: Water is break down into hydrogen and oxygen molecules
2 H2O → 2H2 + O2
Single displacement:
Single displacement means one element replaces by another in a compound.
Example: zinc reacts with hydrochloric acid to form zinc chloride
Zn + 2HCl → ZnCl2 + H2
Double displacement:
Double displacement means two different molecules switch places to form two entirely different compounds.
Example: Silver nitrate combines with sodium chloride to form silver chloride and sodium nitrate
AgNO3 + NaCl → AgCl + NaNO3