Question
The amount of oxygen in the inhaled air is 21% and 0.04% of carbon dioxide.
Answer: Option A
:
A
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A
The air which we breathe in and breathe out is not pure oxygen or carbon dioxide respectively. Inhaled air is a mixture of different gases present in the atmosphere. It contains around 78% nitrogen, 21% oxygen, 0.04% of carbon dioxide and other gases.
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