A: Intermolecular Association is more in Primary amines than `2^(@)` & `3^(@)` amines.
R: More number of hydrogen atoms are available in Primary amines for hydrogen bonding.

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 assertion and reasoning question regarding the intermolecular association in primary, secondary, and tertiary amines, we will analyze both the assertion (A) and the reasoning (R) step by step.

### Step 1: Understanding the Assertion (A)
The assertion states that "Intermolecular Association is more in Primary amines than in Secondary (2°) and Tertiary (3°) amines."

- **Primary Amines**: These have one alkyl group attached to the nitrogen atom and two hydrogen atoms. This allows them to form hydrogen bonds with other primary amines.
- **Secondary Amines**: These have two alkyl groups and one hydrogen atom. They can form hydrogen bonds, but less effectively than primary amines due to having only one hydrogen atom available for bonding.
- **Tertiary Amines**: These have three alkyl groups and no hydrogen atoms attached to the nitrogen. Therefore, they cannot form hydrogen bonds with other amines.

**Conclusion for Assertion**: The assertion is **True** because primary amines can engage in more hydrogen bonding due to the presence of two hydrogen atoms.

### Step 2: Understanding the Reasoning (R)
The reasoning states that "More number of hydrogen atoms are available in Primary amines for hydrogen bonding."

- In primary amines, the nitrogen atom is bonded to two hydrogen atoms, which indeed allows for more opportunities for hydrogen bonding.
- Secondary amines have only one hydrogen atom available for bonding, and tertiary amines have none.

**Conclusion for Reasoning**: The reasoning is also **True** as it correctly explains why primary amines can form more intermolecular associations compared to secondary and tertiary amines.

### Step 3: Evaluating the Relationship Between A and R
Now, we need to determine if the reasoning provided is the correct explanation for the assertion.

- Since the reasoning accurately explains why primary amines exhibit more intermolecular association due to the availability of hydrogen atoms for bonding, we can conclude that the reasoning supports the assertion.

### Final Conclusion
Both the assertion (A) and the reasoning (R) are true, and the reasoning is the correct explanation for the assertion.

### Summary of the Solution
- **Assertion (A)**: True
- **Reasoning (R)**: True
- **Relationship**: R is the correct explanation for A.

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