NEET2011ChemistryGeneral Organic ChemistryActual
The correct decreasing order of p K_a is
Options
- AII > IV > I > III
- BIV > II > III > I
- CIII > II > IV > I
- DIV > I > II > III
Correct answer
A. II > IV > I > III
Step-by-step solution
Weaker acids have higher p K_a - OCH ₃ at meta-position exerts only -I effect, hence increase the acidity. -I effect order : - NO ₂>- OCH ₃>- Cl . - CH ₃ has +I effect. So order is (1).