Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Electron Transfer Redox · Exam: CSIR-NET 2013 · Marks: 2 · Difficulty: Medium
Compounds $\mathrm{K}_{2} \mathrm{Ba}\left[\mathrm{Cu}\left(\mathrm{NO}_{2}\right)_{6}\right](\mathrm{A})$ and $\mathrm{Cs}_{2} \mathrm{Ba}\left[\mathrm{Cu}\left(\mathrm{NO}_{2}\right)_{6}\right](\mathrm{B})$ exhibit tetragonal elongation and tetragonal compression, respectively. The unpaired electron in A and B are found respectively, in orbitals
(a)$\mathrm{d}_{z^{2}}$ and $\mathrm{d}_{x^{2}-y^{2}}$,
(b)$\mathrm{d}_{x^{2}-y^{2}}$ and $\mathrm{d}_{z^{2}}$
(c)$\mathrm{d}_{z^{2}}$ and $\mathrm{d}_{z^{2}}$
(d)$\mathrm{d}_{x^{2}-y^{2}}$ and $\mathrm{d}_{x^{2}-y^{2}}$