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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2009

  • question_answer
        Amongst the following, identify the species with an atom in\[+6\]oxidation state

    A)  \[MnO_{4}^{-}\]                            

    B)  \[Cr(CN)_{6}^{3-}\]

    C)  \[NiF_{6}^{2-}\]                              

    D)  \[Cr{{O}_{2}}C{{l}_{2}}\]

    Correct Answer: D

    Solution :

                    \[MnO_{4}^{-}=x+(-2\times 4)=-1\] \[x-8=-1\] \[x=7\] \[Cr(CN)_{6}^{3-}=x+(-1\times 6)=-3\] \[x-6=-3\] \[x=+3\] \[NiF_{6}^{2-}=x+(-1\times 6)=-2\] \[x-6=-2\] \[x=4\] \[Cr{{O}_{2}}C{{l}_{2}}=x+(-2\times 2)+(-1\times 2)=0\] \[x-4-2=0\] \[x-6=0\] \[x=6\]                


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