Primary, secondary and tertiary amines are

Options

A. Metamer
B. Position isomers
C. Functional isomer
D. Tautomer

Answer

### Step-by-Step Solution

**Step 1: Define Amines**
Amines are organic compounds derived from ammonia (NH₃) by replacing one or more hydrogen atoms with alkyl or aryl groups. They can be classified into three categories based on the number of carbon-containing groups attached to the nitrogen atom.

**Step 2: Identify Primary Amines**
Primary amines (1° amines) have one alkyl or aryl group attached to the nitrogen atom. The general structure can be represented as R-NH₂, where R is an alkyl or aryl group. For example, in ethylamine (C₂H₅NH₂), the nitrogen is bonded to one ethyl group and two hydrogen atoms.

**Step 3: Identify Secondary Amines**
Secondary amines (2° amines) have two alkyl or aryl groups attached to the nitrogen atom. The general structure can be represented as R₁R₂NH, where R₁ and R₂ are alkyl or aryl groups. For example, in dimethylamine (C₂H₅NH), the nitrogen is bonded to two methyl groups and one hydrogen atom.

**Step 4: Identify Tertiary Amines**
Tertiary amines (3° amines) have three alkyl or aryl groups attached to the nitrogen atom. The general structure can be represented as R₁R₂R₃N, where R₁, R₂, and R₃ are alkyl or aryl groups. For example, in trimethylamine (N(CH₃)₃), the nitrogen is bonded to three methyl groups.

**Step 5: Classify Amines as Functional Isomers**
Primary, secondary, and tertiary amines are classified as functional isomers because they have the same molecular formula but different structural formulas and properties due to the varying number of carbon groups attached to the nitrogen atom.

### Summary of Amines
- **Primary Amines (1°)**: One alkyl group (R-NH₂)
- **Secondary Amines (2°)**: Two alkyl groups (R₁R₂NH)
- **Tertiary Amines (3°)**: Three alkyl groups (R₁R₂R₃N)