Which of the following is not a correct statement for primary aliphatic amines?
- (A)The intermolecular association in primary amines is less than the intermolecular association in secondary amines.✓ Correct
- (B)Primary amines can be prepared by the Gabriel phthalimide synthesis.
- (C)Primary amines on treating with nitrous acid solution form corresponding alcohols except methyl amine.
- (D)Primary amines are less basic than the secondary amines.
Answer: (A)
Solution
A primary amine has two bonds while a secondary amine has only one, so a primary amine forms more intermolecular hydrogen bonds and shows greater, not smaller, intermolecular association than a comparable secondary amine. The statement that primary amines associate less than secondary amines is therefore the incorrect one. The other statements hold: Gabriel synthesis gives primary amines, aliphatic primary amines give alcohols with nitrous acid, and primary amines are somewhat less basic than secondary amines.
JEE Main · 2021 · 27 Aug 2021 · Shift 1 · Single correct option