The increasing order of acid strength of the following carboxylic acids is:
\[
(i) \text{(CH}_3\text{)}_3\text{C-COOH} \quad (ii) \text{(CH}_3\text{)}_2\text{CH-COOH} \quad (iii) \text{CH}_3\text{CH}_2\text{COOH}
\]
The increasing order of acid strength of the following carboxylic acids is:
\[
(i) \text{(CH}_3\text{)}_3\text{C-COOH} \quad (ii) \text{(CH}_3\text{)}_2\text{CH-COOH} \quad (iii) \text{CH}_3\text{CH}_2\text{COOH}
\]
Show Hint
- \( (i)<(ii)<(iii) \)
- \( (i)<(iii)<(ii) \)
\( (ii)<(i)<(iii) \)
\( (ii)<(iii)<(i) \)
\( (iii)<(ii)<(i) \)
The Correct Option is
Solution and Explanation
The acidity of carboxylic acids is influenced by the electron-donating or withdrawing nature of substituent groups.
Electron-donating groups decrease acidity, while electron-withdrawing groups enhance acidity.
- Tertiary butanoic acid \((i)\) has three alkyl groups, making it the strongest acid.
- Isobutyric acid \((ii)\) has two alkyl groups, making it less acidic than (i).
- Propionic acid \((iii)\) has only one alkyl group, making it the least acidic.
Thus, the correct order of increasing acid strength is: \[ {(iii) < (ii) < (i)} \]
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