KVPY2019ChemistryGeneral Organic Chemistry
The correct order of basicity of the following amines
Options
- AI > II > III > IV
- BI > III > II > IV
- CIII > II > I > IV
- DIV > III > II > I
Correct answer
B. I > III > II > IV
Step-by-step solution
I is most basic, because the lone pair of nitrogen is not delocalised by resonance in that, but in all others, there is resonance with benzene ring. III is more basic than II due to + R (or + M ) effect of - CH 3 , and IV is less basic than II because of - R (or -   M ) effect of - NO 2 , i.e. correct order is I > III > II > IV .