Answer: Octahedral (Delta_o = 9/4 Delta_t); octahedral complexes have much larger splitting.
- A Octahedral (Delta_o = 9/4 Delta_t); octahedral complexes have much larger splitting
- B Tetrahedral splitting, which exceeds octahedral splitting for the same ligand
- C Both geometries give numerically identical splitting energies
- D The relative splitting depends solely on the ligand and not on geometry
Correct answer: A. Octahedral (Delta_o = 9/4 Delta_t); octahedral complexes have much larger splitting
Explanation: Delta_o/Delta_t = 9/4; octahedral fields cause about 2.25 times more splitting than tetrahedral fields due to 6 vs 4 ligands and geometry.
Aqueous solutions of transition metal ions show characteristic colours caused by electrons absorbing visible light to jump between split d-orbitals; the exact colour depends on the metal, its oxidation state, and surrounding ligands.
Concept context
Transition metals (d-block) and lanthanides/actinides (f-block). Known for coloured compounds, variable oxidation states, complex formation, and catalytic properties. Frequently tested in JEE and NEET.