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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2006

  • question_answer
        Which of the following ions can be replaced by \[{{H}^{+}}\]ions when\[{{H}_{2}}\]gas is bubbled through the solutions containing these ions?

    A)  \[L{{i}^{+}}\]                    

    B)   \[B{{a}^{2+}}\]  

    C)  \[C{{u}^{2+}}\]                                

    D)  \[B{{e}^{2+}}\]

    Correct Answer: C

    Solution :

                    Key Idea: The ions which lies below\[{{H}^{+}}\]in electrochemical series, displace B^ from solution. \[\because \]\[C{{u}^{2+}}\]lies below\[{{H}^{+}}\]in electrochemical series \[\therefore \]\[C{{u}^{2+}}\]ions displace\[{{H}^{+}}\]when\[{{H}_{2}}\]gas is bubbled in solution containing these ions.


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