JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Self Evaluation Test - Structure of Atom

  • question_answer
    The wave number of the first emission line in the Balmer series of H-Spectrum is: (R = Rydberg constant):

    A) \[\frac{5}{36}R\]           

    B) \[\frac{9}{400}R\]

    C) \[\frac{7}{6}R\]            

    D) \[\frac{3}{4}R\]

    Correct Answer: A

    Solution :

    [a] \[\overline{v}=R{{Z}^{2}}\left( \frac{1}{{{2}^{2}}}-\frac{1}{{{3}^{2}}} \right)\] \[=R\left( \frac{1}{4}-\frac{1}{9} \right)=\frac{5R}{36}\]


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