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Question
Which acid of the pair shown here would you expect to be stronger?
CH2FCO2H or CH2ClCO2H
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Solution
FCH2COO– ion is more stable than ClCH2COO– ion due to stronger −I effect of F than Cl. Hence FCH2COOH is a stronger acid than ClCH2COOH.
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\[\begin{array}{cc}
\ce{O}\phantom{...............................................}\\
||\phantom{...............................................}\\
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