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Question


Identify the appropriate category in which combustion can be categorised.


Options:
A .   Physical process
B .   Chemical process
C .   Cyclic process
D .   Biological process
Answer: Option B
:
B

Combustion refers to the process where a substance burns in the presence of oxygen, giving off heat and light in the process. 
The way to recognize a chemical change is to check whether a new substance is being created or not. During combustion, the fuel reacts with oxygen to form some new gases. So, a new substance is definitely formed. So, combustion is a chemical change.



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