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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

Q5(d). Absorption bands of aqueous V(III)

Question

For the complex [V(H₂O)₆]³⁺, how many absorption bands are expected in principle in its UV-Vis spectrum and why? Show the ground state to excited state transition for each band.

Answer in brief

Three spin-allowed d–d bands are expected in principle from the ³T₁g(F) ground state.

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The full model answer

As written for the answer booklet: the diagram carries the working, the lines stay short. Read here only; it is not offered as a download.

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Topic notes: electronic spectra of complexes: term symbols, selection rules, Orgel diagrams and charge transfer, with every Civil Services, IFoS and Geo-Scientist PYQ →

Covers[V(H2O)6]3+ spectrumd2 octahedralOrgel diagramd–d transitionsterm symbols

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