Chemistry - Coordination Chemistry Question with Solution | TestHub

${\left[{\mathrm{FeF}}_6\right]}^{3-}>{\left[{\mathrm{CoF}}_6\right]}^{3-}>{\left[\mathrm{Ni}(\mathrm{CN}{)}_4\right]}^{2-}>\left[\mathrm{Ni}(\mathrm{CO}{)}_4\right]$

${\left[\mathrm{Ni}(\mathrm{CN}{)}_4\right]}^{2-}>{\left[{\mathrm{FeF}}_6\right]}^{3-}>{\left[{\mathrm{CoF}}_6\right]}^{3-}>\left[\mathrm{Ni}(\mathrm{CO}{)}_4\right]$

${\left[{\mathrm{CoF}}_6\right]}^{3-}>{\left[{\mathrm{FeF}}_6\right]}^{3-}>\left[\mathrm{Ni}(\mathrm{CO}{)}_4\right]>{\left[\mathrm{Ni}(\mathrm{CN}{)}_4\right]}^{2-}$

${\left[{\mathrm{FeF}}_6\right]}^{3-}>{\left[{\mathrm{CoF}}_6\right]}^{3-}>{\left[\mathrm{Ni}(\mathrm{CN}{)}_4\right]}^{2-}=\left[\mathrm{Ni}(\mathrm{CO}{)}_4\right]$