Home Biology Breathing and Exchange of Gases Statement Based Questions These questions consist of two statements ea…
Biology Breathing and Exchange of Gases Statement Based Questions Single Correct MCQ
Published on: August 23, 2026

These questions consist of two statements each, printed as Statement-I and Statement-II. While answering these questions, you are required to choose any one of the following four responses.

Statement-I:  diffuses from tissue to alveoli and not in reverse direction.
Statement-II:  is 10 times more soluble than .

A

Both Statement-I and Statement-II are correct.

B

Both Statement-I and Statement-II are incorrect.

C

Statement-I is correct & Statement-II is incorrect.

D

Statement-I is incorrect & Statement-II is correct.

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Text Solution

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The correct answer is:
C

(c) As the solubility of  is 20-25 times higher than that of , the amount of  that can diffuse through the diffusion membrane per unit difference in partial pressure is much higher compared to that of . The solubility and the thickness of the diffusion surface are the factors that are favourable for diffusion of  from alveoli to tissues and that of  from tissues to alveoli.

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