Question

24. Analysis of a sample of air gives the following details: Nitrogen-78%,
Oxygen-16.4%, Carbon Dioxide-4.4%. From which of the following sources
the sample of air is most probably taken?
O
dissolved air from pond
fresh air from field
O
exhaled air
inhaled air
25. in fishes gills are the respiratory organs. Gills are projections of which of​

Answer 1

Answer:

24. The percentage of oxygen and carbon dioxide in inhaled air is 21% and 0.04% respectively. During respiration, oxygen is used up by the cells producing carbon dioxide. The percentage of carbon dioxide in exhaled air is 4.4% and oxygen is 14-16% and nitrogen is 78%.

So, the correct answer is option C