As the order of the negative inductive effect increases, the acidity of the carboxylic acids increases.
On the basis of −I effect, the correct acidic strength would be:

The correct order of strengths of carboxylic acids is

Held on 30 Apr 2016 · Verified 9 Jul 2026.
I>II>III
II>III>I
III>II>I
II>I>III
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