Correct order of acidic strength is
CH2BrCOOH > HCOOH > CH2BrCH2COOH > C6H5COOH
HCOOH > CH2BrCOOH > CH2BrCH2COOH > C6H5COOH
CH2BrCOOH > CH2BrCH2COOH > HCOOH > C6H5COOH
CH2BrCOOH > HCOOH > C6H5COOH > CH2BrCH2COOH
α - halocarboxylic acid > Formic acid > β - halocarboxylicacid > Benzoic acid.
– I effect of halogroup decreases with increase in distance.