Question

Which of the following is the secondary amine?

• A. Aniline
• B. Diphenylamine
• C. Sec-butylamine
• D. Tert-butylamine

Answer 1

The correct option is B Diphenylamine

Primary amines are formed when one hydrogen atom in ammonia is substituted by an alkyl or aromatic group. Secondary amines are those amines that have two organic substituents either alkyl or aryl ones or both. They are bound to the nitrogen together with one hydrogen. Tertiary amines are those where the nitrogen consists of three organic substituents.

Diphenylamine is aromatic secondary amine. N atom is attached to two aryl groups and one H atom. Aniline is aromatic primary amine. Sec-butyl amine and tert-butyl amine are aliphatic primary amines.