The basic nature of amines can be explained on the basis hybridisation. The basic nature order is sp3>sp2>sp. If the lone pair on nitrogen involved in resonance, then it is less basic than others. In the molecules A, B and D, the nitrogen is sp2 hybridised. In the pyrrole molecule the lone pair on nitrogen involving in conjugation to get aromaticity. Hence, C is most basic and B is least basic.
JEE Main 2020 — Chemistry Organic Chemistry
2020mcqmedium
The increasing order of basicity of the following compounds is :
Official previous-year question
Held on 5 Sept 2020 · Verified 6 Jul 2026.
Options
- A
(A)<(B)<(C)<(D)
- B
(B)<(A)<(D)<(C)
- C
(D)<(A)<(B)<(C)
- D
(B)<(A)<(C)<(D)
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