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  4. The difference in the number of unpaired electrons in Co2 + ion in its high-spin and low-spin octahedral complexes is -----.

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

NTA AbhyasNTA Abhyas 2022

Solution:

$Co^{2 +}\Rightarrow \left[\right.Ar\left]\right.3d^{7}$
High-spin complex:
Solution
3 unpaired electrons
Low-spin complex:
Solution
1 unpaired electron
$\therefore $ Difference $=3-1=2$