Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Activated charcoal adsorbs $\ce{SO2}$ more efficiently than $\ce{CH4}$. Reason R: Gases with lower critical temperatures are readily adsorbed by activated charcoal. In the light of the above statements, choose the correct answer from the options given below.

(C) $\mathbf{A}$ is correct but $\mathbf{R}$ is not correct.

(A) Both $\mathbf{A}$ and $\mathbf{R}$ are correct and $\mathbf{R}$ is the correct explanation of $\mathbf{A}$.

(B) Both $\mathbf{A}$ and $\mathbf{R}$ are correct but $\mathbf{R}$ is NOT the correct explanation of $\mathbf{A}$.

(D) $\mathbf{A}$ is not correct but $\mathbf{R}$ is correct.

JEE Main · 2022 · 27 Jul 2022 · Shift 1 · Surface Chemistry

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Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Activated charcoal adsorbs

SO X_{2}

more efficiently than

CH X_{4}

.
Reason R: Gases with lower critical temperatures are readily adsorbed by activated charcoal.
In the light of the above statements, choose the correct answer from the options given below.

(A)Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$ .
(B)Both $A$ and $R$ are correct but $R$ is NOT the correct explanation of $A$ .
(C) $A$ is correct but $R$ is not correct.✓ Correct
(D) $A$ is not correct but $R$ is correct.

Answer: (C)

Solution

Assertion A is correct:

SO X_{2}

has a higher critical temperature (430 K) than

CH X_{4}

(190 K), so it is more easily liquefied and more readily adsorbed on activated charcoal.

Reason R is incorrect: gases with higher critical temperatures (not lower) are more readily adsorbed, because they can be more easily liquefied and have stronger intermolecular forces.

The answer is (C).

JEE Main · 2022 · 27 Jul 2022 · Shift 1 · Single correct option

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JEE Main · 2022 · 27 Jul 2022 · Shift 1 · Surface Chemistry

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