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NEET Sample Paper NEET Sample Test Paper-15

  • question_answer
    Hydrogen atoms are excited from ground state to the principal quantum number 4. Then the number of spectral lines observed will be

    A)  3                    

    B)  6

    C)  5                    

    D)  2

    Correct Answer: B

    Solution :

    The number of spectral lines observed from quantum number n is \[\frac{n(n-1)}{2}.\] When n = 4, number of lines is \[\frac{4(4-1)}{2}=6\] Hence, the correction option is [b].


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