Which is more acidic, o-nitrobenzoic acid, p-nitrobenzoic acid or m-nitrobenzoic acid?

Answer 1

I'm no organic chemist, but it would make sense that it should be the ortho isomer since that position is closer to the carboxyl group and the electrons withdrawing of the NO₂ group would have a greater effect and make it easier for the acid hydrogen to be released.