Colour in transition metal complexes Quiz
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5 questions, one answer each
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1. Which ion is colourless in aqueous solution?
- A. Cr³⁺
- B. Zn²⁺
- C. Mn²⁺
- D. Co²⁺
2. What is the effect of ligands on the d orbitals?
- A. They merge them into one orbital
- B. They remove the electrons
- C. They have no effect on energy
- D. They split them into groups of different energy
3. What is the colour seen in a solution of a transition metal complex?
- A. The colour of the light that is transmitted
- B. The colour of the light that is absorbed
- C. The colour of the ligand's atoms
- D. Always white
4. Which change in the reaction [Co(H₂O)₆]²⁺ + 4Cl⁻ → [CoCl₄]²⁻ + 6H₂O causes the colour change?
- A. Oxidation number of cobalt
- B. Charge on the ion only
- C. Change of ligand and coordination number
- D. The number of 3d electrons
5. Which ion would be expected to be coloured?
- A. Sc³⁺
- B. Ti⁴⁺
- C. Zn²⁺
- D. Cu²⁺