Class 8 Chemistry Combustion and Flame Fuels


The substance undergoing combustion are termed as combustible substances or fuels. In the above example of Bonfire, wood is used as a fuel. In earlier days people used to cook food from the heat liberated by the burning of coal which was used as a fuel. In modern we cook food using LPG cylinders which is fuel and undergoes burning liberating tremendous heat to cook food.

Fuel can be available in three forms.

  • Solid fuels: - wood, charcoal, coal, etc.
  • Liquid fuels: - petrol, diesel, kerosene, etc
  • Gaseous fuels: - compressed natural gas, liquefied petroleum gas, biogas, hydrogen etc.

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