i think it is 1>3>2=4
7 Answers
Unicorn--- Extinct!!
·2009-10-24 00:55:30
you can proceed by checking the stability of the conjugate base...
roboarmy filas
·2009-10-27 04:08:53
because only electron withdrawing groups increase acidity of cooh group..
as we know NO2 is effective at ortho and para positions 2 and 4 have equal acidity..
as ortho group is nearer than para NO2 it has greter pulling efect compared to para position so 1 is given preference over 3