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AMU Medical AMU Solved Paper-1995

  • question_answer
    The oxidation states of\[Mn\]in\[MnS{{O}_{4}},Mn{{O}_{2}}\] \[{{K}_{2}}Mn{{O}_{4}}\]and\[KMn{{O}_{4}}\]are respectively

    A)  1, 2, 4, 4      

    B)  2, 4, 6, 7

    C)  1, 2, 4, 6      

    D)  2, 4, 7, 6

    Correct Answer: B

    Solution :

    : \[MnS{{O}_{4}}:+x-2=0\Rightarrow x=+2.\] \[Mn{{O}_{2}}:x+2(-2)\Rightarrow x-4=0\Rightarrow x=+4\] \[{{K}_{2}}Mn{{O}_{4}}:(+1)\times 2+x+(-2)\times 4\] \[\Rightarrow \]\[+2+x-8\Rightarrow x=+6.\]


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