Burning of coal is an example of ______.

The correct answer is a Combination Reaction.

Key Points 

• The combustion of coal is an example of Combination Reaction.
• A combination reaction is a reaction where two or more elements or compounds combine to form a single compound. Such reactions are represented by equations of the following form: X + Y → XY.
• The combination of two or more elements to form one compound is called a combination reaction.

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Additional Information 

Other types of Chemical Reactions:

• Decomposition reaction:
  • The opposite of a combination reaction, a complex molecule breaks down to make simpler ones. Such reactions are represented by equations of the following form: AB → A + B.
• Precipitation reaction: 
  • Two solutions of soluble salts are mixed resulting in an insoluble solid (precipitate) forming. Such reactions are represented by equations of the following form: A + Soluble salt B  → Precipitate + soluble salt C.
• Neutralization reaction: 
  • An acid and a base react with each other. Generally, the product of this reaction is salt and water. Such reactions are represented by equations of the following form: Acid + Base → Salt + Water.
• Combustion reaction: 
  • Oxygen combines with a compound to form carbon dioxide and water. These reactions are exothermic, meaning they give off heat. Such reactions are represented by equations of the following form: A + O2 → H2O + CO2.
• Displacement reaction: 
  • One element takes place with another element in the compound. Such reactions are represented by equations of the following form: A + BC → AC + B.
• Double displacement reaction:
  •  Double displacement reactions occur when a part of two ionic compounds is exchanged and makes two new components.
  •  Double displacement reactions take place mostly in aqueous solutions wherein the ions precipitate and the exchange of ions takes place.