Question

What is the nature of oxides of first row transition elements formed in the lower oxidation states?

Answer 1

1. Oxides in lower oxidation states are generally basic.
2. These basic oxides react with acids to form corresponding salts.
3. Oxides in higher oxidation states tend to be acidic.
4. Oxides with intermediate oxidation states are usually amphoteric.
5. Examples: MnO (basic, Mn +2), FeO (basic), while MnO₂ is amphoteric.
6. This trend is due to the metal’s oxidation state influencing oxide character.