The order of basicity is I > III > II > IV The lone pair of electrons on N is more readily available for protonation in I and III then in II. III contains an oxygen atom which has - I effect due to which it is less basic than I. In compound IV lone pair of e−s on N-atom is contributed towards the aromatic sextet formation and hence is not at all available for protonation. Hence option (b) is correct.
The order of basicity of the compounds JEE Main 2012 Chemistry, General Organic Chemistry — question figure is
JEE Main 2012 — Chemistry Organic Chemistry
2012mcqmedium
The order of basicity of the compounds 
is
Official previous-year question
Held on 19 May 2012 · Verified 6 Jul 2026.
Options
- A
IV > I > III > II
- B
I > III > II > IV
- C
III > I > IV > II
- D
II > I > III > IV
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