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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2010

  • question_answer
    The spin only magnetic moment of \[M{{n}^{4+}}\] ion is nearly

    A)  \[3BM\]         

    B)  \[6BM\]

    C)  \[4BM\]         

    D)  \[5BM\]

    Correct Answer: C

    Solution :

    The electronic configuration of \[Mn\] is \[_{25}Mn=[Ar]3{{d}^{5}}\,4{{s}^{2}}\] \[M{{n}^{4+}}=[Ar]\,3{{d}^{3}}\] Thus, three unpaired electrons are present. \[\therefore \]Spin only magnetic moment, \[\mu =\sqrt{n(n+2)}\] \[\therefore \] \[n=3\] \[\therefore \] \[\mu =\sqrt{3(3+2)}\] \[=\sqrt{15}=3.87\] \[=4BM\]


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