Given below are two statement : one is labelled as
Assertion A and the other is labelled as Reason R.
Assertion A :`SO _(2) (g) `is adsorbed to a large extent than `H _(2) (g)` on activated charcoal.
Reason R : `SO _(2) (g)` has a higher critical temperature than `H _(2) (g).`
In the light of the above statements, choose the most appropriate answer from the options given below.

Options

A. Both A and R are correct but R is not the correct explanation for of A
B. Both A and R are correct and R is the correct explanation of A.
C. A is not correct but R is correct.
D. A is correct but R is not correct.

Answer

To solve the question, we need to evaluate the given Assertion A and Reason R regarding the adsorption of gases on activated charcoal.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- Assertion A states that `SO2 (g)` is adsorbed to a larger extent than `H2 (g)` on activated charcoal.
- This is based on the principle of adsorption, where gases with stronger intermolecular forces tend to be adsorbed more.

2. **Understanding the Reason (R)**:
- Reason R states that `SO2 (g)` has a higher critical temperature than `H2 (g)`.
- The critical temperature is the highest temperature at which a substance can exist as a liquid. Above this temperature, no amount of pressure can liquefy the substance.

3. **Comparing Critical Temperatures**:
- The critical temperature of `SO2` is approximately 630 K.
- The critical temperature of `H2` is approximately 33 K.
- Since `SO2` has a significantly higher critical temperature than `H2`, this indicates that `SO2` can be more easily liquefied compared to `H2`.

4. **Relating Critical Temperature to Adsorption**:
- A higher critical temperature generally indicates stronger intermolecular forces (like Van der Waals forces) in the gas.
- Therefore, `SO2`, with its higher critical temperature, will have stronger interactions with the surface of activated charcoal, leading to greater adsorption compared to `H2`.

5. **Conclusion**:
- Both the assertion and the reason are true.
- The reason correctly explains the assertion because the higher critical temperature of `SO2` contributes to its greater adsorption on activated charcoal compared to `H2`.

### Final Answer:
- The correct option is that both Assertion A and Reason R are true, and R is the correct explanation of A.

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