A) \[~C{{H}_{3}}CHFCOOH\]
B) \[~FC{{H}_{2}}C{{H}_{2}}COOH\]
C) \[BrC{{H}_{2}}C{{H}_{2}}COOH\]
D) \[C{{H}_{3}}CHBrCOOH\]
Correct Answer: C
Solution :
Group or atom attached with ?COOH group shows negative inductive effect, makes the acid stronger or acid has the larger dissociation constant. ?Br shows poor negative inductive effect and also far away from ?COOH, which makes \[\text{BrC}{{\text{H}}_{\text{2}}}\text{C}{{\text{H}}_{\text{2}}}\text{COOH}\]weakest acid and hence, it has smallest dissociation constant.
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