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JEE Main & Advanced AIEEE Solved Paper-2012

  • question_answer
    The electrons identified by quantum numbers n and \[\ell \] : (a) \[n=4,\,\,\ell =1\]                         (b) \[n=4,\,\,\ell =0\] (c) \[n=3,\,\,\ell =2\]                         (d) \[n=3,\,\,\ell =1\]can be placed in order of increasing energy as :   AIEEE  Solved  Paper-2012

    A) \[(c)<(d)<(b)<(a)\]            

    B)              \[(d)<(b)<(c)<(a)\]

    C) \[(b)<(d)<(a)<(c)\]            

    D) \[(a)<(c)<(b)<(d)\]

    Correct Answer: B

    Solution :

                 (a) 4 p                                       (b) 4 s              (c) 3 d                                       (d) 3 p Acc. to \[(n+\ell )\] rule, increasing order of energy \[(d)<(b)<(c)<(a)\]


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