Question

What are the types of chemical reaction? Explain the four types of chemical reaction with example.

Answer 1

A chemical reaction is a process that enables certain chemical compounds to react together and make new compounds, or to convert into respective elements. Chemical reactions are of different types, like combination, decomposition reactions, etc.

Complete answer:
Chemical reactions are of different types, like:
- Combination reaction
- Decomposition reaction
- Displacement reaction
- Double- displacement reaction
- Neutralization reaction
- Oxidation and reduction reactions
The four main chemical reactions are explained as:
1.Combination reaction: this reaction involves 2 reactants to combine together to form a single product. The example for combination reaction is a combustion reaction as, $2Mg+{{O}_{2}}\to 2MgO$ , and reaction to form carbon dioxide, $C+{{O}_{2}}\to C{{O}_{2}}$.
2. Decomposition reaction: this reaction involves a single reactant to decompose and form two products. For example, water decomposition to yield hydrogen and oxygen gases as, $2{{H}_{2}}O\to 2{{H}_{2}}+{{O}_{2}}$
3. Displacement reaction: this reaction involves a more reactive element from the reactants, displacing the less reactive element from the aqueous salt solution. Metal displacement consists of displacing a metal, while non- metal displacement consists of displacing a non- metal. For example, $Zn+CuS{{O}_{4}}(aq)\to ZnS{{O}_{4}}(aq)+Cu$ .
4. Double displacement reaction: this reaction is also called salt metathesis reaction. It involves exchanging species between reactants to form new products. For example, $AgN{{O}_{3}}+NaCl\to AgCl+NaN{{O}_{3}}$ .
Hence, the types of chemical reactions were explained.

Note:
Neutralization is a reaction between acid and a base that forms a salt, while oxidation reaction has a species reduced by losing electrons, while in reduction reactions, electrons are gained and the species is oxidized. The reaction where oxidation and reduction occur simultaneously is called a disproportionation reaction.