Question

why only oxygen is necessary for combustion ,why not other gas?
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Answer 1

In order to burn this fuel, oxygen is needed, as it is with any fire. The waste products from the combustion process are water and carbon dioxide. Thus, we breathe because oxygen is needed to burn the fuel (sugars and fatty acids) in our cells to produce energy The air we breathe contains about 21% oxygen.

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Answer 2

Answer:

Explanation:we need oxygen for combustion because it helps in burning not other gases like carbon dioxide as we all know that CO2is used in fire extinguishers...as it do not support burning. It hinders burning.

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