MCQ
Which of the following complexes is not expected to absorb visible light?
- A$\left[ Cr \left( NH _3\right)_6\right]^{2+}$
- B$\left[ Ni ( CN )_4\right]^{2-}$
- ✓$\left[ Fe \left( H _2 O \right)_6\right]^{2+}$
- D$\left[ Ni \left( H _2 O \right)_6\right]^{3+}$

