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Indian Forest Service (Mains)

Chemistry optional

  • 2 papers
  • 200 marks each
  • 3 h per paper

Paper I covers physical and inorganic chemistry.

Indian Forest Service (Mains), Chemistry optional · 2022 · Paper I

Q6(c)(i). Octahedral and tetrahedral splitting

Question

Draw the crystal field splitting diagram of d-orbitals in octahedral and tetrahedral fields. In which case would the energy difference (Δ) between the two states be lower? Why would it be so?

Answer in brief

Tetrahedral splitting is smaller: for the same metal, ligands and metal–ligand distance, Δt ≈ (4/9)Δo, and the ordering is reversed.

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Topic notes: crystal field theory, with every Civil Services, IFoS and Geo-Scientist PYQ →

Coverscrystal field splittingoctahedral vs tetrahedralΔt = 4/9 Δocrystal field theoryd-orbital splitting

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