Question

A scientist performed experiments to analyse the two samples of air given to him:
'Air Sample A' and 'Air Sample B'. The results of analysis of these two air samples are given below:

Air Sample A				Air Sample B
Oxygen	:	21%		Oxygen	:	16.4%
Carbon dioxide	:	0.04%		Carbon dioxide	:	4.4%
Water vapour	:	A little		Water Vapour	:	A lot

(a) Which air sample, A or B, represents 'exhaled air'? Why?
(b) Which air sample, A or B, represents 'inhaled air'? Why?​

Answer 1

Sample B represents exhaled air.
Exhaled air contains more amount of carbon dioxide and water vapor.

Sample A represents inhaled air.
Inhaled air contains more amount of oxygen and less amount of carbon dioxide and vapor.