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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Mock Test - Atomic Structure

  • question_answer
    The wave number of the first line of Balmer series of hydrogen is 15200\[c{{m}^{-1}}\]. The wave number of the corresponding line of \[L{{i}^{{{2}^{+}}}}\]ion is

    A) \[15200\,c{{m}^{-1}}\]

    B) \[60800\,c{{m}^{-1}}\]

    C) \[76000\,c{{m}^{-1}}\]

    D) \[136800\,c{{m}^{-1}}\]

    Correct Answer: D

    Solution :

    [d] \[\overline{v}(L{{i}^{2+}})={{z}^{2}}\times 15200c{{m}^{-1}}\]             \[={{3}^{2}}\times 15200c{{m}^{-1}}\]             \[=9\times 15200c{{m}^{-1}}\]             \[=136800c{{m}^{-1}}\]


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