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NEET Sample Paper NEET Sample Test Paper-58

  • question_answer
    The ionic radii of isoelectronic species \[{{N}^{3-}}\],\[{{O}^{2-}}\], and F in \[\overset{o}{\mathop{A}}\,\] 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 :

    [c] 1.71,1.40,1.36 Like covalent radii, the ionic radii of anions also increase as moving down the group due to increase in number of shell.
    In \[\overset{{}^\circ }{\mathop{A}}\,\]  
    lonid radii anion
    1.36 \[F-\]
    1.81 \[C{{l}^{-}}\]
    1.96 \[Br\]
    2.19 \[{{I}^{-}}\]
    1.42 \[{{O}^{2\,-}}\]
    1.84 \[{{S}^{2-}}\]
    1.71 \[{{N}^{3-}}\]


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