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Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2006

  • question_answer
    A mixture containing \[C{{u}^{2+}}\] and \[N{{i}^{2+}}\] can be separated for identification by

    A)  passing \[{{H}_{2}}S\] in acid medium

    B)  passing \[{{H}_{2}}S\] in alkaline medium

    C)  passing \[{{H}_{2}}S\] in neutral medium

    D)  passing \[{{H}_{2}}S\] in dry mixture

    Correct Answer: A

    Solution :

    Passing \[{{H}_{2}}S\] gas in acid medium  \[C{{u}^{2+}}\]precipitated as \[CuS\] while \[N{{i}^{2+}}\] doesn't precipitated.


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