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Which of the following is the weakest ac...

Which of the following is the weakest acid?

A

`(CH_(3))_(3)C COOH`

B

`CH_(3)COOH`

C

`CH_(3)CH_(2)COOH`

D

`(CH_(3))_(2)CHCOOH`

Text Solution

Verified by Experts

The correct Answer is:
A
The acidic strength of a carboxylic acid decreases due to the presence of an electron releasing substituent because the substituents destabilize the carboxylate ion by intensifying its negative charge. Thus, the more the number of electron releasing alkyl groups, the weaker the acid would be, As a result, trimethylacetic acid having maximum number of electron releasing methyl groups is the weakest acid.
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