Arrange the following amines in order of decreasing basicity (most to least) in aqueous solution: NH₃
CH₃CH₂CH₂NH₂
(CH₃CH₂CH₂) ₂NH
(CH₃CH₂CH₂) ₃N
I
II
III
IV

Question

Arrange the following amines in order of decreasing basicity (most to least)in aqueous solution: NH₃ CH₃CH₂CH₂NH₂ (CH₃CH₂CH₂)₂NH (CH₃CH₂CH₂)₃N I II III IV

Quizplus · Accepted Answer

The basicity of amines in aqueous solution is influenced by the availability of the lone pair on the nitrogen atom and the inductive effect of alkyl groups. Secondary amines (III) are generally more basic than primary amines (II) due to increased electron-donating alkyl groups. Tertiary amines (IV) are less basic than secondary amines due to steric hindrance and solvation effects. Ammonia (I) is the least basic as it lacks alkyl groups.

Arrange the Following Amines in Order of Decreasing Basicity (Most