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  3. BHU PMT

BHU PMT BHU PMT (Screening) Solved Paper-2007

  • question_answer
    Oxidation number of Mn atom in\[KMn{{O}_{4}}\]is

    A)  6                                            

    B)  7

    C)  14                                         

    D)  5

    Correct Answer: B

    Solution :

                     The sum of the oxidation numbers of all the atoms in a molecule of a neutral compound is zero. Let the oxidation number of\[Mn\]is\['x'\]in\[KMn{{O}_{4}}\] \[(+1)+x+4(-2)=0\] \[x-7=0\] \[x=7\]


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