Question

In context with the transition elements, which of the following statements is incorrect?

• A. In the highest oxidation states, the transition metal show basic character and form cationic complexes.
• B. In the highest oxidation states of the first five transition elements (Sc to Mn), all the 4s and 3d electrons are used for bonding.
• C. Once the d5 configuration is exceeded, the tendency to involve all the 3d electrons in bonding decreases.
• D. In addition to the normal oxidation states, the zero oxidation state is also shown by these elements in complexes.

Answer 1

Answer: (A)

In the highest oxidation states, the transition metal show basic character and form cationic complexes.

Answer 2

The basic character of any elements changes with the oxidation state, low oxidation states are more basic and high oxidation state are more acidic. For example, MnO and Mn₂O₃ are basic while Mn₂O₇ is acidic in natures.