A: Lower Aliphatic amines are soluble in water.
R: Lower Aliphatic amines are gases.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C. If Assertion is true statement but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

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

**Assertion (A):** Lower aliphatic amines are soluble in water.
**Reason (R):** Lower aliphatic amines are gases.

### Step-by-Step Solution:

1. **Understanding the Assertion:**
- Lower aliphatic amines, such as methylamine and ethylamine, are indeed soluble in water. This solubility is primarily due to the presence of the nitrogen atom, which can form hydrogen bonds with water molecules.

2. **Analyzing the Reason:**
- The reason states that lower aliphatic amines are gases. While it is true that some lower aliphatic amines can exist as gases (e.g., methylamine), this is not universally applicable to all lower aliphatic amines. For example, ethylamine is a liquid at room temperature.

3. **Evaluating the Relationship Between A and R:**
- The assertion is true because lower aliphatic amines are soluble in water due to hydrogen bonding.
- The reason is also true, but it does not explain why lower aliphatic amines are soluble in water. The solubility is due to hydrogen bonding, not because they are gases.

4. **Conclusion:**
- Both the assertion and reason are true statements, but the reason does not correctly explain the assertion. Therefore, the correct answer is that both assertion and reason are true, but the reason is not the correct explanation for the assertion.

### Final Answer:
Both assertion and reason are true, but the reason is not the correct explanation for the assertion.

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