Problem- Which of the following compounds is the strongest acid? My guess is II because alpha hydrogens are flanked by CN and NO2 which are electron withdrawing thus makes system more acidic than the other choices.
I) CH3CH2CHOHCH2CH2NO2 II) CH3CH2CHNO2CH2CN III) CH3CH2COOCH2CH3
IV) CH3CH2COCH2CHCNCH3 V) CH3CH2CH2CH2CHCHCOOCH2CH3
Please define why you think that's the right answer