Chemistry - Coordination Chemistry Question with Solution | TestHub

he following complexes $\underset{\text{(A)}}{{\left[\mathrm{CoCl}{\left({\mathrm{NH}}_3\right)}_5\right]}^{2+}},\underset{\text{(B)}}{{\left[\mathrm{Co}(\mathrm{CN}{)}_6\right]}^{3-}},\underset{\text{(C)}}{{\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left({\mathrm{H}}_2\mathrm{O}\right)\right]}^{3+}},\underset{\text{(D)}}{{\left[\mathrm{Cu}{\left({\mathrm{H}}_2\mathrm{O}\right)}_4\right]}^{2+}}$ The correct order of A, B, C and D in terms of wavenumber of light absorbed is :