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NEET Sample Paper NEET Sample Test Paper-30

  • question_answer
    The electrons identified by quantum numbers
    I. \[n=4,\,l=1\]       
    II.  \[n=4,\,l=0\]
    III.  \[n=3,\,l=2\]       
    IV. \[n=2,\,l=1\]
    can be placed in order of increasing energy from the lowest to highest as:

    A) IV < II < III < I    

    B)  II < IV < I < III

    C)  I < III < II < IV    

    D)  III < I < IV < II

    Correct Answer: A

    Solution :

    For \[~n=4,l=1;\text{ }4p\] For \[n=4,1=0;\text{ }4s\] For \[n=3,1=2;\text{ 3}d\] For \[n=2,1=1;\text{ }2p\] The order of increasing energy is as:             \[2p<4s<3d<4p\] i.e.       \[IV<II<III<I\]


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