Question

From the options given below, which one of the following is a primary amine?

• A. \( \text{Ethylamine} \, (\text{CH}_3\text{CH}_2\text{NH}_2) \)
• B. \( \text{Diethylamine} \, (\text{CH}_3\text{CH}_2\text{NHCH}_2\text{CH}_3) \)
• C. \( \text{Triethylamine} \, (\text{N(CH}_2\text{CH}_3)_3) \)
• D. \( \text{Aniline} \, (\text{C}_6\text{H}_5\text{NH}_2) \)

Hint:

Primary amines have the general formula \( R-NH_2 \), where \( R \) is an alkyl or aryl group. Secondary and tertiary amines differ by the number of alkyl groups attached to the nitrogen atom.

Answer 1

The Correct Option is A

A primary amine is an organic compound with the functional group \( -NH_2 \), where one hydrogen atom of ammonia is replaced by an alkyl or aryl group. Among the options, \( \text{Ethylamine} \) has the structure \( \text{CH}_3\text{CH}_2\text{NH}_2 \), which contains the \( -NH_2 \) group, making it a primary amine. Other options such as \( \text{Diethylamine} \) and \( \text{Triethylamine} \) are secondary and tertiary amines, respectively, and \( \text{Aniline} \) contains an aromatic \( -NH_2 \) group.