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NEET Sample Paper NEET Sample Test Paper-3

  • question_answer
    A metal nitrate reacts with KI to give a black precipitate which on addition of excess of KI convert into orange colour solution. The cation of metal nitrate is

    A)  \[H{{g}^{2+}}\]                

    B)  \[B{{i}^{3+}}\]

    C)  \[P{{b}^{2+}}\]               

    D)  \[C{{u}^{+}}\]

    Correct Answer: B

    Solution :

        \[Bi{{\left( N{{O}_{3}} \right)}_{2}}+3KI\xrightarrow{{}}\underset{Black\,ppt}{\mathop{Bi{{I}_{3}}}}\,+3KN{{O}_{3}}\] \[Bi{{I}_{3}}+KI\xrightarrow{{}}\underset{orange\,colour}{\mathop{K\left[ Bi{{I}_{4}} \right]}}\,\]


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