Assertion : Acetone and aniline shows negative deviations.
Reason : H-bonding between acetone and aniline is stronger
than that between acetone-acetone and aniline-aniline.

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 both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Acetone and aniline show negative deviations."
- Negative deviation occurs in a solution when the interactions between the different components (in this case, acetone and aniline) are stronger than the interactions between the same components in their pure states.

2. **Understanding the Reason**:
- The reason provided is that "H-bonding between acetone and aniline is stronger than that between acetone-acetone and aniline-aniline."
- This suggests that when acetone and aniline mix, the hydrogen bonding formed between them is stronger than the hydrogen bonding that occurs within pure acetone or pure aniline.

3. **Analyzing the Interaction**:
- In pure acetone, the molecules interact with each other through dipole-dipole interactions.
- In pure aniline, the molecules also interact through hydrogen bonding.
- When acetone and aniline are mixed, they form stronger hydrogen bonds due to the presence of the nitrogen atom in aniline, which can form hydrogen bonds with the oxygen atom in acetone.

4. **Conclusion**:
- Since the interactions between acetone and aniline are stronger than those in their pure forms, this leads to negative deviations from Raoult's Law.
- Therefore, both the assertion and the reason are true, and the reason correctly explains the assertion.

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

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