Chemistry - Coordination Chemistry Question with Solution | TestHub

As vacant d-orbitals are not available in nitrogen hence it can not exhibit a valency of 5 i.e.$\mathrm{N}\mathrm{C}{\mathrm{l}}_5$is not possible. Rest other statements are correct here.
${\mathrm{K}}_{\mathrm{e}\mathrm{q}}=\frac{{\mathrm{K}}_{\mathrm{f}}}{{\mathrm{K}}_{\mathrm{b}}}$
$[\mathrm{N}\mathrm{i}\left(\mathrm{C}\mathrm{O}{)}_4\right]$is tetrahedral as Ni is having$\mathrm{s}{\mathrm{p}}^3$hybridisation.
Permanent magnetic moment of$[\mathrm{C}\mathrm{u}{\left(\mathrm{N}{\mathrm{H}}_3{)}_4\right]}^{2+}$is 1.732 B.M as in it$\mathrm{C}{\mathrm{u}}^{2+}$has 1 unpaired electron so$\mathrm{\mu }=\sqrt{\mathrm{n}\left(\mathrm{n}+2\right)}=\sqrt{1\left(1+2\right)}=\mathrm{1.73\; BM}$