Question

In context with the transition element, which of the following statement 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 element. (Sc to Mn), all the `4s` and `3d` electrons are used for bonding
C. Once the `5d` configuration is exceeded, the tendency to involve all the `3d` electrons in bonding decrease.
D. In addition to the normal oxidation state, the zero oxidation state is also shown by these elements in complexes.

Answer 1

Correct Answer - 1
The basic character of any element changes with the oxidation state,low oxidation state are more basic and high oxidation state are more acidic. For example,`MnO` and `Mn_(2)O_(3)` are basic while `Mn_(2)O_(7)` is acidic in nature.