Choose the incoorect statement

Options

A. Primary amines show intermolecular hydrogen bonds.
B. Tert-Butylamine is a primary amine.
C. Tertiary amines do not show intermolecular hydrogen bonds.
D. Isopropylamine is a secondary amine.

Explanation

To solve the question of identifying the incorrect statement regarding amines, we can analyze each statement step by step.

### Step 1: Understand the definitions of amines
Amines are classified based on the number of carbon groups attached to the nitrogen atom:
- **Primary amine (1°)**: Nitrogen is attached to one carbon atom (RNH2).
- **Secondary amine (2°)**: Nitrogen is attached to two carbon atoms (R2NH).
- **Tertiary amine (3°)**: Nitrogen is attached to three carbon atoms (R3N).

### Step 2: Analyze the first statement
**Statement 1**: "Primary amines show intermolecular hydrogen bonding."
- Primary amines can form hydrogen bonds due to the presence of an NH2 group. This statement is **correct**.

### Step 3: Analyze the second statement
**Statement 2**: "Tertiary butyl amine is a primary amine."
- Tertiary butyl amine (C4H11N) has the structure (CH3)3CNH2, where nitrogen is attached to three carbon groups. Therefore, it is a tertiary amine, not a primary amine. This statement is **incorrect**.

### Step 4: Analyze the third statement
**Statement 3**: "Tertiary amines do not show intermolecular hydrogen bonds."
- Tertiary amines lack hydrogen atoms attached to nitrogen, which means they cannot form hydrogen bonds. This statement is **correct**.

### Step 5: Analyze the fourth statement
**Statement 4**: "Isopropyl amine is a secondary amine."
- Isopropyl amine has the structure (CH3)2CHOH, where nitrogen is attached to two carbon atoms. Therefore, it is a secondary amine. This statement is **correct**.

### Conclusion
The incorrect statement among the options is **Statement 2**: "Tertiary butyl amine is a primary amine."

### Final Answer
The incorrect statement is: **Tertiary butyl amine is a primary amine.**

---