Question:
Which of the following is the weakest acid?
Which of the following is the weakest acid?
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Stronger the $-I$ effect, stronger the acid.
Updated On: Apr 24, 2026
- \(FCH_2COOH\)
- \(NC-CH_2COOH\)
- \(Cl_2C-COOH\)
- \(O_2N-CH_2COOH\)
- \(Cl_2CHCOOH\)
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The Correct Option is A
Solution and Explanation
Concept:
Acidity of carboxylic acids increases with electron withdrawing groups.
Step 1: Compare substituents.
• \(NO_2, CN, Cl\) $\rightarrow$ strong electron withdrawing → stronger acid
• \(F\) $\rightarrow$ comparatively weaker effect
Step 2: Identify weakest acid.
\[ FCH_2COOH \text{ has weakest electron withdrawing effect} \]
Step 1: Compare substituents.
• \(NO_2, CN, Cl\) $\rightarrow$ strong electron withdrawing → stronger acid
• \(F\) $\rightarrow$ comparatively weaker effect
Step 2: Identify weakest acid.
\[ FCH_2COOH \text{ has weakest electron withdrawing effect} \]
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