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    Chemistry-
    General
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    Question

    Which of the following compounds is weakest acid?

    The correct answer is:

      Electron withdrawing groups (like – N O subscript 2 right parenthesis increase the acidity of phenols by stabilising corresponding phenoxide ion. The effect of – N O subscript 2 group will beminimum at m-position due to lack of increased delocalisation of electrons in it. Hence, m-nitrophenol is the weakest acid among these.

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