which of the following statement is correct?

Options

A. The lesser number of oxidation state in `3d`-series in the beginning of the series is due to the presence of too few electrons to loose or share
B. The lesser number of oxidation states in `3d-series` towards the end of the series is due to the presence of too many electrons and thus fewer empty orbital to share electrons with the ligands
C. (A) and (B) both
D. None is correct

Answer

C

Explanation

The lesser number of oxidation states in the begining of series can be due to the presence of smaller number of electrons to lose or share `(Sc,Ti)`. On the other hand, at the extreme right hand side end `(Cu,Zn)` lesser number of oxidation state is due to large number of d electrons so that only a fewer orbitals are available in which the electron can share with other for higher valence.