JEE Main & Advanced JEE Main Paper (Held On 9 April 2017)

  • question_answer
    The electron in the hydrogen atom undergoes transition from higher orbitals to orbital of radius 211.6 pm. This transition is associated with:                       [JEE Online 09-04-2017]

    A)  Lyman series    

    B)  Balmer series

    C)  Brackett series                

    D)  Paschen series

    Correct Answer: B

    Solution :

                      \[R=211.6\ pm\,=2.11\,\overset{\text{o}}{\mathop{\text{A}}}\,\]                 \[R=0.529\,\times \frac{{{n}^{2}}}{Z}\,=2.11\,\overset{\text{o}}{\mathop{\text{A}}}\,\]                \[{{n}^{2}}=4\Rightarrow \,n=2\]


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