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JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Mock Test - Classification Elements Periodicity Properties

  • question_answer
    The ionic radii \[(in\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,)\] of \[{{N}^{3-}},{{O}^{2-}}\] and \[{{F}^{-}}\] are respectively:

    A) 1.36, 1.40 and 1.71  

    B) 1.36, 1.71 and 1.40

    C) 1.71, 1.40 and 1.36

    D) 1.71, 1.36 and 1.40

    Correct Answer: C

    Solution :

    [c] These are isoelectronic species. Size of isoelectronic species. \[\propto 1/Z\]
      \[{{N}^{3-}}\] \[{{O}^{2-}}\] \[{{F}^{-}}\]
    Z 7 8 9
    \[n{{e}^{-}}\] 10 10 10
    As negative charge increases, ionic radius increases.


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