Oxidation numbers of the metal in the minerals haematite and magneetit

1.	Oxidation numbers of the metal in the minerals haematite and magneetite respectively are:
Answer» II,III in haematite and III in magnetite II, III in haematite and II in magnetite IIinhaematitie and II,III in magnetite III in haematitie and II, III in magnetitie Solution :In haematite `(Fe_(2)O_(3))`, oxidation NUMBER of Fe:2x+3(-2)=0,x=+3 In magnetitte `(Fe_(3)O_(4))` is a mixed oxide of FEO and `Fe_(2)O_(3)` In FeO,the oxidation number of Fe: x-2=0 orx=+2 In `Fe_(2)O_(3)`O,the oxidation number of Fe: 2x+3(-2) =0 or x=+3

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