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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Dinesh khalmaniya 1
check the pka values correct order is 1>2>3>4. 1 is most acidic because of ortho effect.. Now we will check the -I effect of F at meta and para position. -I effect is maximum at meta and less on para so meta is more acidic than para. there is no effect in benzoic acid.. so overall acidity order is 1>2>3>4