Question

Read the assertion and reason carefully to mark the correct option in question

Assertion: The amount of $C{O}_2$ that can diffuse through the diffusion membrane per unit difference in partial pressure is much higher compared to that of $O_2.$

Reason: Solubility of $C{O}_2$ is $20-25$ times higher than that of $O_2.$

• A. If both assertion and reasons are true and the reason is the correct explanation of the assertion.
• B. If assertion is true but reason is false.
• C. If both assertion and reasons are true but the reason is not the correct explanation of the assertion.
• D. If both assertion and reason are false.

Answer 1

The correct option is A

If both assertion and reasons are true and the reason is the correct explanation of the assertion.

Assertion

The amount of $C{O}_2$ that can diffuse through the diffusion membrane per unit difference in partial pressure is much higher compared to that of $O_2.$

Elaboration:

A $C{O}_2$ gradient is present from tissues to blood and blood to alveoli. $C{O}_2$ is highly soluble in blood. It is transferred through dissolved state and diffuses through diffusion membrane$\left(\text{membrane of alveoli}\right)$ and the diffusion rate is much higher than oxygen. So, the assertion is correct.

Reason

Solubility of $C{O}_2$ is $20-25$ times higher than that of $O_2.$

Elaboration:

$C{O}_2$ is highly soluble in blood as compared to oxygen. Its solubility is about $20-25$ times higher than that of $O_2.$ The reason is correct and is the correct explanation for assertion.

Final answer

$\left(A\right)$ If both assertion and reasons are true and the reason is the correct explanation of the assertion.