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DUMET Medical DUMET Medical Solved Paper-2009

  • question_answer
    If \[{{I}_{2}}\] is dissolved in aqueous KI, the intense yellow species, \[I_{3}^{-}\], is formed. The structure of \[I_{3}^{-}\] ion is

    A)  square pyramidal

    B)  trigonal bipyramidal

    C)  octahedral

    D)  pentagonal bipyramidal

    Correct Answer: B

    Solution :

    \[KI+{{I}_{2}}\rightleftarrows \underset{potassium\text{ }triiodide}{\mathop{K{{I}_{3}}}}\,\]     In \[K{{l}_{3}},\,s{{p}^{3}}\] hybridisation is present, therefore its structure should be trigonal bipyramidal.


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