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J & K CET Medical J & K - CET Medical Solved Paper-2003

  • question_answer
    The ionic radii of iso-electronic species \[N_{3}^{-},{{O}^{2-}}\]and\[{{F}^{-}}\]are in the order:

    A)  1.36, 1.40, 1.71

    B)  1.36, 1.71, 1.40

    C)  1.71, 1.40, 1.36

    D)  1.71, 1.36, 1.40

    Correct Answer: C

    Solution :

                     The size of isoelectronic species decreases with increasing nuclear charge. Hence, the order of ionic radii of\[N_{3}^{-},{{O}^{2-}}\]and\[{{F}^{-}}\]is as: \[\begin{align}   & N_{3}^{-}\,\,\,\,\,>\,\,{{O}^{2-}}\,\,\,\,>\,\,\,{{F}^{-}} \\  & 1.71~~\,\,\,~~1.40~~~~~~1.36 \\ \end{align}\]


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