what is combustion?
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burning of a substance in the presence of O2 by the liberation of heat and light is called combustion.....
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Explanation:
A chemical process in which a substance reacts with oxygen to give off heat is called combustion. The substance that undergoes combustion is said to be combustible. It is also called fuel. The fuel may be solid, liquid or gas. Sometimes, light is also given off during combustion, either as a flame or as a glow
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