Q251
The exhaled air contains
A.
carbon dioxide only
B.
a mixture of carbon dioxide and nitrogen
C.
a mixture which has more carbon dioxide than oxygen
D.
a mixture of carbon dioxide, nitrogen and oxygen in which nitrogen has the highest percentage
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
The exhaled air contains a mixture of carbon dioxide, nitrogen and oxygen in which nitrogen has the highest percentage. Exhaled air contains less oxygen and more carbon dioxide, it is also saturated with water vapour. Exhaled air contains: 78% nitrogen and16% oxygen.