JEE Main & Advanced Chemistry The s-Block Elements Question Bank Critical Thinking

  • question_answer The following acids have been arranged in the order of decreasing acid strength. Identify the correct order. (I) \[ClOH\]  (II) \[BrOH\]  (III) \[IOH\] [IIT 1996]

    A) \[I>II>III\]

    B) \[II>I>III\]

    C) \[III>II>I\]

    D) \[I>III>II\]

    Correct Answer: A

    Solution :

    The oxidation state of halogens is same +1. Therefore the acidic character depends only upon the electronegativity. Higher the electronegativity of the halogen more easily if will pull the electrons of \[O-H\] bond toward itself and hence, stronger is the acid.

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