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NEET NEET SOLVED PAPER 2017

  • question_answer
    Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?                                                                                                                              

    A)  Li                           

    B)  Na

    C)  K                           

    D)  Rb

    Correct Answer: A

    Solution :

                     \[\text{L}{{\text{i}}^{\text{+}}}\]being smallest, has maximum charge density \[\therefore \]\[L{{i}^{+}}\]is most heavily hydrated among all alkali metal ions. Effective size of \[L{{i}^{+}}\]in aq solution is therefore, largest. \[\therefore \]Moves slowest under electric field.


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