Question

Discuss the nature of oxides of first row transition elements.

Answer 1

1. These elements form oxides with general formulas like MO, M₂O₃, M₃O₄, MO₂, M₂O₅, MO₃.
2. Oxides in lower oxidation states are generally basic.
3. Oxides in higher oxidation states tend to be acidic.
4. Oxides with metals in intermediate oxidation states are usually amphoteric.
5. Basic and amphoteric oxides dissolve in acids to form hexaaqua metal ions.
6. Some mixed oxides and non-stoichiometric oxides are also formed.
7. The variation of oxide nature across the series reflects changes in oxidation states of the metals.