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Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2006

  • question_answer
    Strongest Breasted base among the following anions is

    A)  \[Cl{{O}^{-}}\]                 

    B)  \[ClO_{2}^{-}\]

    C)  \[ClO_{3}^{-}\]                

    D)  \[ClO_{4}^{-}\]

    Correct Answer: A

    Solution :

    Conjugate base of weak acid is always strong.
    Conjugate base Acid Oxidation sate of \[Cl\].
    \[Cl{{O}^{-}}\] \[HClO\] \[+I\]
    \[ClO_{2}^{-}\] \[HCl{{O}_{2}}\] \[+III\]
    \[ClO_{3}^{-}\] \[HCl{{O}_{3}}\] \[+V\]
    \[ClO_{4}^{-}\] \[HCl{{O}_{4}}\] \[+VII\]
    In case of oxyacids of same element, as oxidation number of element increases their acidic strength increases. \[HClO\] is weakest acid, hence its conjugate base is strongest \[Cl{{O}^{-}}\].


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