Choose the incorrect 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 nitrogen-containing compounds, we will analyze each statement one by one.

### Step 1: Analyze the First Statement
**Statement:** Primary amine shows intermolecular hydrogen bonding.

**Analysis:**
Primary amines have one nitrogen atom bonded to two hydrogen atoms and one alkyl or aryl group. This allows them to form hydrogen bonds with other primary amine molecules. Thus, this statement is **correct**.

### Step 2: Analyze the Second Statement
**Statement:** Tertiary butyl amine is a primary amine.

**Analysis:**
Tertiary butyl amine (tert-butyl amine) has a nitrogen atom bonded to three alkyl groups (specifically, three butyl groups). Since it does not have a hydrogen atom directly bonded to the nitrogen, it cannot be classified as a primary amine. Therefore, this statement is **incorrect**.

### Step 3: Analyze the Third Statement
**Statement:** Tertiary amine does not show intermolecular hydrogen bonding.

**Analysis:**
Tertiary amines have three alkyl groups attached to the nitrogen atom and do not have any hydrogen atoms bonded to nitrogen. As a result, they cannot form hydrogen bonds with other tertiary amine molecules. This statement is **correct**.

### Step 4: Analyze the Fourth Statement
**Statement:** Isopropyl amine is a secondary amine.

**Analysis:**
Isopropyl amine has one nitrogen atom bonded to one hydrogen atom and two isopropyl groups. This means it has two carbon-containing groups and one hydrogen, making it a secondary amine. Thus, this statement is **correct**.

### Conclusion
After analyzing all the statements, we find that the **incorrect statement** is:
- **Tertiary butyl amine is a primary amine.**