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NEET Sample Paper NEET Sample Test Paper-18

  • question_answer
    When the electron of a hydrogen atom jumps from \[n=4\]  to  \[n=1\] state, the number of spectral lines  emitted is

    A)  9                                

    B)  3

    C)  6                                

    D)  15

    Correct Answer: C

    Solution :

    \[\frac{({{n}_{2}}-{{n}_{1}})({{n}_{2}}-{{n}_{1}}+1)}{2}\] Here, \[{{n}_{2}}=4,\,{{n}_{1}}=1.\] So \[(N)=\frac{(4-1)(4-1+1)}{2}\] \[=\frac{3\times 4}{2}=6.\] Hence, the correct option is [c].


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