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