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NEET Sample Paper NEET Sample Test Paper-58

  • question_answer
    Among \[A{{l}_{2}}\,{{O}_{3}}\],\[Si{{O}_{2}}\],\[{{P}_{2}}{{O}_{3}}\] and \[S{{O}_{2}}\], the correct order of acid strength is:

    A) \[S{{O}_{2}}<{{P}_{2}}{{O}_{3}}<Si{{O}_{2}}<A{{s}_{2}}{{O}_{3}}\]

    B) \[Si{{O}_{2}}<S{{O}_{2}}<A{{s}_{2}}{{O}_{3}}<{{P}_{2}}{{O}_{3}}\]

    C) \[A{{s}_{2}}{{O}_{3}}<Si{{O}_{2}}<S{{O}_{2}}<{{P}_{2}}{{O}_{3}}\]

    D) \[A{{s}_{2}}{{O}_{3}}<Si{{O}_{2}}<{{P}_{2}}{{O}_{3}}<S{{O}_{2}}\]

    Correct Answer: D

    Solution :

    [d] \[A{{s}_{2}}\,{{O}_{3}}<Si{{O}_{2}}<{{P}_{2}}{{O}_{3}}<S{{O}_{2}}\] Higher the oxidation state and higher the electronegativity, more acidic is the oxide. Reactivity of the elements decreases down the group from As to Bi.


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