1.

Oxidation states of the metal in the minerals haematite and magnetite, respectively, are....

Answer»

II, III haematite and III in MAGNETITE. 
II, III in haematite and II in magnetite. 
II in haematite and II, III in magnetite. 
III in haematite and II, III in magnetite. 

SOLUTION :(i) Haematite `Fe_(2)O_(3) :Fe`
`:. 2x + 3 (-2) = 0`
`:.x = 3`
(ii) Magnetite `(Fe_2O_4)` is MIXTURE of `FeO` and `Fe_2O_3`
`:. FeOFe = 2`
`Fe_2 O_3 Fe = 3`


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