KVPY Sample Paper KVPY Stream-SX Model Paper-30

  • question_answer
    The correct statements among I to III regarding group 13 element oxides are,
    (I) Boron trioxide is acidic.
    (II) Oxides of aluminium and gallium are amphoteric.
    (Ill) Oxides of indium and thallium are basic.

    A) (I) and (II) only

    B) (I) and (III) only

    C) (II) and (III) only 

    D) (I), (II) and (III) only

    Correct Answer: D

    Solution :

    \[{{B}_{2}}{{O}_{3}}\] is acrolic in nature. \[A{{l}_{2}}{{O}_{3}}\] and \[C{{a}_{2}}{{O}_{3}}\] are amphoteric oxides of In and \[T\ell \] are basic in nature.


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