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Air Around Us-III
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Which components of air are present in the air exhaled by humans during breathing?
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A
N2, CO2, O2 and water vapour
💡 Explanation:
Exhaled air contains all the components of inhaled air, but in different proportions: nitrogen remains the largest component, oxygen decreases (some used in respiration), carbon dioxide increases (produced by respiration), and water vapor is added. Therefore all four - N2, CO2, O2, and water vapour - are present.