Question
Tertiary amines have the lowest boiling points because ,
MHT CET
Chemistry
Amines
2026
MHT CET 2026 (16 April Shift 2)
MHT CET Chemistry Question (2026) — Solution
Options
- A. They possess polar N-C bonds
- B. They possess inter-molecular dipole-dipole attraction forces.
- C. They possess inter-molecular H-bonding
- D. They do not possess inter-molecular H- bonding
Answer
D. They do not possess inter-molecular H- bonding
Step-by-step solution
Tertiary amines have the general formula R_3N. Since there are no hydrogen atoms directly attached to the highly electronegative nitrogen atom, they cannot form intermolecular hydrogen bonds. In contrast, primary and secondary amines have hydrogen atoms attached to nitrogen and can form intermolecular hydrogen bonds, which leads to higher boiling points. Due to the absence of intermolecular hydrogen bonding, tertiary amines have the lowest boiling points among isomeric amines.
Related: Chemistry — Amines · All PYQ Banks