Identify the incorrect statement.
1
Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.
2
The oxidation states of chromium in CrO\(_{4}^{2−}\) and Cr2O\(_{7}^{2−}\) are not the same.
3
Cr2+(d4) is a stronger reducing agent than Fe2+(d6) in water.
4
The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.