Question

Identify tertiary amine from following.

• A. Cyclohexanamine
• B. Ethane-1,2-diamine
• C. N-Phenylbenzeneamine
• D. N-Ethyl-N-Methylpropan-2-amine

Hint:

$1^{\circ}$: $RNH_{2}$; $2^{\circ}$: $R_{2}NH$; $3^{\circ}$: $R_{3}N$.

Answer 1

The Correct Option is D

Step 1: Concept
A tertiary ($3^{\circ}$) amine has three carbon atoms directly attached to the nitrogen atom (no H atoms on N).

Step 2: Analysis
- (A) is a primary amine ($R-NH_{2}$). - (B) consists of two primary amine groups. - (C) is a secondary amine ($R_{2}NH$). - (D) has three alkyl groups (Ethyl, Methyl, and Isopropyl) on the Nitrogen.

Step 3: Conclusion
Hence, (D) is the tertiary amine. Final Answer: (D)