JEE Main20199 Apr 2019Morning ShiftChemistryGeneral Organic ChemistryActual
The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is:
Options
- AA < B < C < D
- BB < C < A < D
- CD < B < A < C
- DD < A < C < B
Correct answer
D. D < A < C < B
Step-by-step solution
Reactivity of E + substitution ∝ π e - can be present on the aromatic compound. Electrophilic substitution ∝ + M   ∝ 1 - M ∝ + H C   ∝ 1 - H C ∝ + I   ∝ 1 - I (order of e - density α electrophilic substitution) Ring e - density is highest. So B > C > A > D