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Question

A physical process in which a substance reacts with oxygen to give off heat is called combustion


A
True
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B
False
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Solution

The correct option is B False

Combustion reaction:

  • The chemical process is one where the reaction occurs between fuel and oxygen to give off heat and is called combustion.
  • Heat and light energy are released during this reaction. The flame then develops from the energy of heat and light.
  • The Combustion reaction formula is
  • Hydrocarbon+oxygenHeatenergy

Chemical changes in combustion:

  • Combustion is a chemical process where substances are converted to two or other new products.
  • As combustion of a hydrocarbon produces a new compound and it is irreversible so, it is a chemical process.
  • The physical change does not occur in the combustion process as it is a reversible one and no new products will be formed in case of physical change. So, combustion is a chemical change.
  • Examples of combustion processes are the burning of coal or wood, Car and buses burning petrol or diesel to run.

Therefore, the given statement is false.


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