Assertion : Charcoal is used in separation of noble gases.
Reason : Charcoal has porous structure.

Options

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

Answer

To solve the question, we need to analyze the assertion and reason provided:

**Assertion:** Charcoal is used in the separation of noble gases.
**Reason:** Charcoal has a porous structure.

### Step-by-Step Solution:

1. **Understanding the Assertion:**
- The assertion states that charcoal is used for the separation of noble gases. This is indeed true as charcoal is known for its ability to adsorb various gases, including noble gases.

2. **Understanding the Reason:**
- The reason provided is that charcoal has a porous structure. This is also true. The porous nature of charcoal allows it to have a large surface area, which is essential for the adsorption process.

3. **Connecting Assertion and Reason:**
- The assertion and reason are related. The porous structure of charcoal is what makes it an effective adsorbent for noble gases. Adsorption occurs when gas molecules adhere to the surface of a solid, and the porous nature of charcoal enhances this process.

4. **Identifying the Type of Relationship:**
- Both statements are correct, and the reason provided explains why the assertion is true. The porous structure of charcoal is the key factor that enables it to separate noble gases effectively.

5. **Conclusion:**
- Since both the assertion and reason are correct, and the reason is a valid explanation for the assertion, we conclude that the answer is that both statements are true, and the reason is the correct explanation of the assertion.

### Final Answer:
Both the assertion and reason are true, and the reason is the correct explanation of the assertion.

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