Which among the given acids has lowest pKa value - Vidyadip

MCQ

Which among the given acids has lowest $pKa$ value

A
Chloroacetic acid
B
Bromoacetic acid
✓
Nitroacetic acid
D
Cyanoacetic acid

✓

Answer

Correct option: C.

Nitroacetic acid

c
$(O_2N)- CH_2 -COOH$ ; $EWG$ increases Acidic strong $-I$ effect strength.

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