1.

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

Answer»

II, III in 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 is `Fe_(2)O_(3)` in which Fe is present in III OXIDATION state.
(ii) Magnetite `(Fe_(3)O_(4))` is an EQUIMOLAR MIXTURE of FeO and `Fe_(2)O_(3)`.
Oxidation state of Fe in FeO is II.
Oxidation state of Fe in `Fe_(2)O_(3)` is III.


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