Question

Identify the incorrect statement.

Options

• Cr²⁺(d⁴) is a stronger reducing agent than Fe²⁺(d⁶) in water.

• 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.

• Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.

• The oxidation states of chromium in \[\ce{CrO^{2-}_4}\] and \[\ce{Cr2O^{2-}_7}\] are not the same.

Answer 1

The oxidation states of chromium in \[\ce{CrO^{2-}_4}\] and \[\ce{Cr2O^{2-}_7}\] are not the same.

Explanation:

The chromium has the same oxidation state (+6) in both \[\ce{CrO^{2-}_4}\] and \[\ce{Cr2O^{2-}_7}\].