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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2009

  • question_answer
    In which of the following, \[N{{H}_{3}}\] is not used?

    A)  Tollen's reagent

    B)  Nessler's reagent

    C)  Group reagent for the analysis of IV group basic radicals

    D)  Group reagent for the analysis of III group basic radicals

    Correct Answer: B

    Solution :

    Potassium tetraiodo mercurate (II) ie,\[{{K}_{2}}[Hg{{I}_{4}}]\] dissolves in \[KOH\] solution to give Nessler's reagent. Nessler?s reagent is used to test \[{{K}_{2}}[Hg{{I}_{4}}]\] ions.


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