Assertion:The change in entropy during melting of ice is negligible in comparison to change in entropy during vaporisation.
Reason:The volume occupied by solid and liquids is too less in comparison to volume occupied by gas.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertiion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are False

Explanation

To solve the assertion and reason question, we will break down the concepts of entropy, phase changes, and the relationship between volume and entropy.

### Step-by-Step Solution:

1. **Understanding the Assertion:**
- The assertion states that the change in entropy during the melting of ice is negligible compared to the change in entropy during vaporization.
- **Entropy** is a measure of disorder or randomness in a system. When a solid (like ice) melts into a liquid, there is an increase in disorder, but it is relatively small compared to the transition from a liquid to a gas (vaporization), where the increase in disorder is much larger.

2. **Understanding the Reason:**
- The reason given is that the volume occupied by solids and liquids is much less compared to the volume occupied by gases.
- In solids, particles are closely packed and have a definite shape and volume. In liquids, particles are still close together but can flow. In gases, particles are far apart and occupy a much larger volume, leading to greater disorder.

3. **Analyzing the Change in Entropy:**
- When ice melts (solid to liquid), the entropy change (ΔS_fusion) is significant but limited because the particles are still relatively close together.
- When a liquid vaporizes (liquid to gas), the entropy change (ΔS_vaporization) is much larger because the gas particles are much more spread out and disordered.

4. **Comparing the Two Changes:**
- Since the volume occupied by gases is significantly larger than that of solids and liquids, the increase in entropy during vaporization is much greater than during fusion.
- Therefore, the assertion that the change in entropy during melting is negligible compared to that during vaporization is correct.

5. **Conclusion:**
- Both the assertion and reason are true, and the reason correctly explains the assertion. Thus, we conclude that both statements are true and the reason is the correct explanation for the assertion.

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

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