Question

Which acid exihibits the lowest value for it's pka?

Answer 1

Explanation:

chlorine has the highest - effect at the a position. Since C l C H 2 C O O H has only one α − C l atom and C l 2 C H C O O H has two α − C l atoms; therefore, C H C l 2 C O O H is a strongest acid among all and has lowest p K a value