[CPMT 1991]
A) $ A{{l}^{3+}} $
B) $ C{{r}^{3+}} $
C) $ F{{e}^{3+}} $
D) $ Z{{n}^{2+}} $
Correct Answer: C
All the oxides of $ Fe(FeO,,Fe_2O_3 $ and $ Fe_3O_4) $ are basic in nature.
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