NEET Chemistry Concepts of Acids & Bases NEET PYQ-Concepts Of Acids Bases

  • question_answer
    Which one of the following orders correctly represents the increasing acid strengths of the given acids?    [AIPMT (S) 2007]

    A)  \[HOCl<HOClO<HOCl{{O}_{2}}<HOCl{{O}_{3}}\]

    B)  \[HOClO<HOCl<HOCl{{O}_{3}}<HOCI{{O}_{2}}\]

    C)  \[HOCl{{O}_{2}}<HOCl{{O}_{3}}<HOClO<HOCl\]

    D)  \[HOCl{{O}_{3}}<HOCl{{O}_{2}}<HOClO<HOCl\]

    Correct Answer: D

    Solution :

    The acidic character of oxyacids increases with increase in oxidation number. Acidity of oxyacids of chlorine decreases in the following order.
    \[\overset{+7}{\mathop{HCl{{O}_{4}}}}\,>\overset{+5}{\mathop{HCl{{O}_{3}}}}\,>\overset{+3}{\mathop{HCl{{O}_{2}}}}\,>\overset{+1}{\mathop{HClO}}\,\]
    So relative acidic character increases.


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