MCQ
Which of the following complex ions is not expected to absorb visible light?
- ✓$[Ni(CN)_4]^{2-}$
- B$[Cr(NH_3)_6]^{3+}$
- C$[Fe(H_2O)_6]^{2+}$
- D$[Ni(H_2O)_6]^{2+}$
✓
Answer
Correct option: A.
$[Ni(CN)_4]^{2-}$
a
A transition metal complex absorbs visible tight only if it has unpaired electrons.
A transition metal complex absorbs visible tight only if it has unpaired electrons.
No unpaired electron so does not absorb visible light.
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