Question

The difference in the number of unpaired electrons in $C{o}^{2+}$ ion in its high-spin and low-spin octahedral complexes is -----.

Answer 1

Answer: 2

$C{o}^{2+}\Rightarrow [Ar]3d^7$
High-spin complex:

3 unpaired electrons
Low-spin complex:

1 unpaired electron
$\therefore$ Difference $=3-1=2$