Match column I and column II for the oxidation states of the central a

1.	Match column I and column II for the oxidation states of the central atoms.
Answer» SOLUTION :`A.to(4)""B.to(5)""C.to(3)""D.to(1)` Suppose that x be the oxidation states of CENTRAL atoms A. Oxidation number of CR in `Cr_(2)O_(7)^(2-)` `2x+7(-2)=-2` `2x-14=-2` `2x=+12` `x=+6` B. Oxidation number of MN in `MnO_(4)^(-)` `x+4(-2)=-1` `x-8=-1` `x=+7` C. Oxidation number of V in `VO_(3)^(-)` `x+3(-2)=-1` `x-6=-1` `x=+5` D. Oxidation number of Fe in `FeF_(6)^(3-)` `x+6(-1)=-3` `x-6=-3` `x=+3`

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