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Q.

The oxidation number of Mn in K2MnO4 and KMnCN6 are respectively .

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a

+6 and +3 

b

+6 and +2 

c

+7 and +2 

d

+7 and +6

answer is A.

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Detailed Solution

  • The oxidation state of Mn in K2MnO4 

             2 (+1)+x +4 (-2) =0

             x-6 = 0

              x =+6

  • The oxidation state of Mn in K3MnCN6

               3(+1) +x +6(-1) =0

                  x -3 =0 

           x = +3

 

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