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Question

The strongest acid among the following acids is :

A
HCOOH
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B
CH3COOH
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C
(CH3)2CHCOOH
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D
(CH3)3CCOOH
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Solution

The correct option is C HCOOH
Among the given acids, formic acid is the strongest acid.
As the number of methyl groups increases, the electron releasing +I effect of substituents decreases the acidity of carboxylic acids by intensifying the negative charge by inductive effect and destabilizing the carboxylate anion.

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