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JEE · NEET Previous Year Question

$Which of the following compounds is most acidic in nature?$

Topic: JEE PYQ

Answer: C. Full step-by-step solution below.

A $4-Chlorobutanoic acid$
B $3-Chlorobutanoic acid$
C $2-Chlorobutanoic acid$
D $Butanoic acid$

Correct answer: C

Solution

(c) : As the distance of the halogen atom from the - COOH group increases, - I -effect of the halogen decreases. Hence, 2 -chlorobutanoic acid will be most acidic.

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