If electron has spin quantum number +1/2 and a magnetic quantum number - 1, it cannot be present in

  1. A

    d-orbital

  2. B

    f-orbital

  3. C

    p-orbital

  4. D

    s-orbital

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    Solution:

    As m = (2l + 1), hence m = - 1 means,
    1=2+1.=1 (magnitude)
    i.e least value of l = l. So it cannot be present in s-orbital. Because for s orbital l = 0. 

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