(i)What has raised the % of CO2 in exhaled air ? (ii) In the above table why is there no change in nitrogen percentage ?

Question

Observe the table and answer the following.

Gas	% in inhaled air	% in exhaled air
Oxygen	21.00	16
CO2	0.03	4
Nitrogen	78	78

(i)What has raised the % of CO₂ in exhaled air ?

(ii) In the above table why is there no change in nitrogen percentage ?

Answer 1

(i) The CO₂ released from our body during respiration has raised the % of CO₂ in exhaled air.

(ii)Nitrogen has no role in our respiration. So there is no change in the percentage of nitrogen.