A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Carbon monoxide
Correct Answer: A
Solution :
Oxygen gas is used by human beings and other living organisms for respiration. Combustion is a chemical process in which a combustible substance reacts with oxygen. Heat and sometimes light energy is released during combustion. Hence, the gas mentioned is oxygen. The correct answer is A.You need to login to perform this action.
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