Question

Mark the correct order of decreasing acid strength of the following compounds.
(a) V > IV > II > I > III
(b) II > IV > I > III > V
(c) IV > V > III > II > I
(d) V > IV > III > II > I

Answer 1

acidic stregth is directly proportional to -m and -I and inverse to +m and+I 1. only phenol no substitute 2. no2 at pera and m effect only applicable ortho and pera position in benzene ring and no2 is -m 3.och3 ka +m hota hai but ortho pera ke but yeh meta par hai toh I effect hoga vo bhi -I 3. no2 at meta means this is also -I 4.och3 at pera means +m option jo aapne diye vo shi likha hai kya kyunki according to concept ans yeh sahi nhi lag rahe hai