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 FalseCombustion 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$\mathrm{Hydrocarbon}+\mathrm{oxygen}\to \mathrm{Heat}\mathrm{energy}$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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