Arrange the following carboxylic acids in increasing order of their acid strength.
A. CH3COOH
B. CH3CH2COOH
C. C6H5CH2COOH
D. C6H5COOH
Choose the correct answer from the options given below:
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Shift 23/05/2023 3:30 PM - 6:30 PM
A
A>B>D>C
B
A>B>C>D
C
D>C>A>B
D
C>D>B>A
Correct Answer
D>C>A>B
Detailed Explanation
3. D > C > A > B.
D (C6H5COOH - Benzoic acid): This compound has an electron-withdrawing phenyl ring which stabilizes the conjugate base, making it the strongest acid among the given options.
C (C6H5CH2COOH - Phenylacetic acid): While it also contains a phenyl ring, the electron-withdrawing effect is slightly less than in benzoic acid.
A (CH3COOH - Acetic acid): It is a simple carboxylic acid without any strong electron-withdrawing groups.
B (CH3CH2COOH - Propanoic acid): This acid has an alkyl group, which is an electron-donating group and hence makes it the weakest acid.
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