Question

Which is more acidic bromo ethanoic acid or iodo ethanoic acid?

Answer 1

Bromoethanoic acid is more acidic than Iodoethanoic acid since Bromine has greater - I effect than Iodine. (I effect or the Inductive effect is responsible for the attraction of the electron cloud towards that element with the highest negative inductive value, making the central atom more electron deficient, i. e. making it more acidic).