JEE Main & Advanced Sample Paper JEE Main Sample Paper-38

  • question_answer 24) Which reagent can be used to identify nickel ion?

    A)  Resorcinol           

    B)  Dimethyl glyoxime

    C)  Diphenyl benzidine    

    D)  Potassium ferrocyanide

    Correct Answer: B

    Solution :

     Nickel salts reacts with dimethyl glyoxime in presence of \[N{{H}_{4}}OH\]to give red ppt. of nickel dimethyl glyoxime. \[\,\,\,\,\,\,\,\begin{matrix}    C{{H}_{3}}-C=NOH  \\    2|  \\    C{{H}_{3}}-C=NOH  \\ \end{matrix}+NiC{{l}_{2}}+2N{{H}_{4}}OH\xrightarrow{{}}\]

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