Complex ions and ligands Quiz
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5 questions, one answer each
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1. What is the overall charge on [CuCl₄] if copper is present as Cu²⁺ and the ligands are Cl⁻?
- A. 4−
- B. 2−
- C. 2+
- D. 6−
2. Which is a bidentate ligand?
- A. H₂O
- B. NH₃
- C. NH₂CH₂CH₂NH₂
- D. Cl⁻
3. Which complex ion is most likely to be tetrahedral?
- A. [CoCl₄]²⁻
- B. [Cu(H₂O)₆]²⁺
- C. [Cu(NH₃)₆]²⁺
- D. [Fe(EDTA)]²⁻
4. What is the coordination number of nickel in [Ni(NH₂CH₂CH₂NH₂)₃]²⁺?
- A. 2
- B. 3
- C. 12
- D. 6
5. Why does carbon monoxide poison haemoglobin?
- A. It oxidises iron(II) to iron(III) ions only
- B. It replaces O₂ by ligand exchange and binds more strongly to Fe²⁺
- C. It breaks the haem ligand into fragments
- D. It is a larger ligand so reduces the coordination number to 4