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AIIMS AIIMS Solved Paper-2001

  • question_answer
    In lake test of \[A{{l}^{3+}}\]ion, there is formation of coloured floating. It is due to:

    A)  absorption of litmus by \[{{H}_{2}}O\]

    B)  adsorption of litmus of \[Al{{(OH)}_{3}}\]

    C)  adsorption of litmus \[Al(OH)_{4}^{-}\]

    D)  none of the above

    Correct Answer: B

    Solution :

    In lake test of \[A{{l}^{3+}}\], there is formation of coloured floating lake because \[Al{{(OH)}_{3}}\], a solid surface (suspension) adsorb litmus colour.


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