Chemistry - Coordination Chemistry Question with Solution | TestHub

1) ${\mathrm{NiCl}}_2.6{\mathrm{H}}_2\mathrm{O}$
${\mathrm{Ni}}^{+2}\to [\mathrm{Ar}{]}_{18}3{ \mathrm{d}}^{8}4{ \mathrm{s}}^0$

2) ${\mathrm{K}}_2\left[\mathrm{Ni}(\mathrm{CN}{)}_4\right]$
$\mathrm{C}.\mathrm{N}.4$    ${\mathrm{Ni}}^{+2}\to [\mathrm{Ar}{]}_{18}3{ \mathrm{d}}^{8}4{ \mathrm{s}}^0$

3) $\mathrm{Ni}(\mathrm{CO}{)}_4$
CO$-$Strong field ligand

4) ${\mathrm{Na}}_2\left[{\mathrm{NiCl}}_4\right]$
$\mathrm{Ni}\to [\mathrm{Ar}{]}_{18}3{ \mathrm{d}}^{8}4{ \mathrm{s}}^0$
CN=4, $\mathrm{Hybridisation} ={\mathrm{sp}}^3$