JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties Question Bank Valency and oxidation state

  • question_answer Which of the following is the correct order of gradually decreasing basic nature of the oxides [MP PMT 1997]

    A) \[A{{l}_{2}}{{O}_{3}}\], \[MgO\], \[C{{l}_{2}}{{O}_{7}}\], \[S{{O}_{3}}\]

    B) \[MgO\], \[A{{l}_{2}}{{O}_{3}}\], \[S{{O}_{3}}\], \[C{{l}_{2}}{{O}_{7}}\]

    C) \[C{{l}_{2}}{{O}_{7}}\], \[S{{O}_{3}}\], \[A{{l}_{2}}{{O}_{3}}\], \[MgO\]

    D) \[S{{O}_{3}}\], \[C{{l}_{2}}{{O}_{7}}\], \[MgO\], \[A{{l}_{2}}{{O}_{3}}\]

    Correct Answer: B

    Solution :

    Across the period non-metallic character increases. Hence basic nature of oxide decreases.

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