MHT CET Medical202626 April 2026Morning ShiftChemistryAminesActual
Which of the following is least alkaline ?
Options
- AO ₂ N-C ₆ H ₄ -NH ₂
- BCH ₃ O-C ₆ H ₄ -NH ₂
- CC ₆ H ₅ C ₆ H ₄ -NH ₂
- DC ₆ H ₅ NH ₂
Correct answer
A. O ₂ N-C ₆ H ₄ -NH ₂
Step-by-step solution
The basicity of substituted anilines depends on the nature of the substituent present on the benzene ring. Electron-donating groups (EDG) increase the electron density on the nitrogen atom, thereby increasing basicity. Electron-withdrawing groups (EWG) decrease the electron density on the nitrogen atom, thereby decreasing basicity. Among the given options: -NO ₂ is a strong electron-withdrawing group due to its strong -I and -M effects. It strongly pulls the electron density away from the amine group, making the lo