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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2011

  • question_answer
        If\[NaOH\]is added to an aqueous solution of zinc ions, a white precipitate appears and on adding excess of\[NaOH\], the precipitate dissolves. In this solution zinc exist in the

    A)  cationic part

    B)  anionic part

    C)  both in cationic and anionic part

    D)  there is no zinc in the solution

    Correct Answer: B

    Solution :

                    \[Z{{n}^{2+}}+2O{{H}^{-}}\xrightarrow[{}]{{}}Zn{{(OH)}_{2}}\downarrow \]\[Zn{{(OH)}_{2}}(s)+2O{{H}^{-}}(aq)\xrightarrow[{}]{{}}ZnO_{2}^{2-}(aq)\]\[+2{{H}_{2}}O(l)\]


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