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CMC Medical CMC-Medical Ludhiana Solved Paper-2012

  • question_answer
    The magnetic moment of complex \[Kn\,\,[Mn{{F}_{6}}]\] is 4.9 BM. What is the oxidation number of Mn and what is the value of n?

    A)  \[M\,(\,V),\,\,n=1\]      

    B)  \[Mn\,(II),\,\,n=4\]

    C)  \[M\,(III),\,\,n=3\]        

    D)  \[Mn\,(IV),\,\,n=2\]

    Correct Answer: D

    Solution :

                    In \[Kn\,[Mn{{F}_{6}}]\]is n = 3 because the magnetic moment of \[M{{n}^{3+}}\]is 4.9 \[2\sqrt{S(S+1)}=2\,\sqrt{2(2+1)}=4.9\] \[n=2\]


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