Which one of the following is strongest acid?
Correct answer: A. FCH COOH
- A. FCH COOH
- B. CH3COOH
- C. CICH COOH
- D. C6H5CH,COOH
Explanation
Electronegativity increases the acidity by increasing the ionic character of O-H. Electronegativity decreases in the order F > Cl > Br, and hence the acidic effect also decreases in the same order. Here and overall, fluorine is the most electronegative element. Thus, it is most acidic.
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About Reactivity of Carboxylic Acids
Carboxylic acids show acidic behaviour because their carboxylate ions are resonance-stabilised, and electron-withdrawing groups can change their strength. Reactions include neutralisation, esterification, formation of acid chlorides and amides, reduction, decarboxylation and substitution at the acyl carbon, which differs from the reactions of phenols.
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