A) \[C{{H}_{3}}COOH\]
B) \[C{{H}_{2}}ClCOOH\]
C) \[C{{H}_{2}}FCOOH\]
D) \[C{{H}_{3}}C{{H}_{2}}COOH\]
Correct Answer: C
Solution :
Key Idea: Proton donors are acids. Electron withdrawing groups (e.g., halogens) increase the acidity. More the electronegativity of halogen, more will be acidic character of acid. \[F\]has highest electronegativity \[\therefore \,\,C{{H}_{2}}FCOOH\]is most acidic among given choices.
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