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Question
Arrange the following in decreasing order of their acidic strength. Give explanation for the arrangement.
\[\ce{C6H5COOH, FCH2COOH, NO2CH2COOH}\]
Solution
\[\ce{NO2CH2COOH > FCH2COOH > C6H5COOH}\]
−NO2 and −F groups are electron-withdrawing groups. Out of the two −NO2 has greater electron withdrawing effect. \[\ce{C6H5}\]−group has electron denoting effect.
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