Coordination Chemistry Mock Tests

The cis-isomer of [Co(en)₂Cl₂]⁺ (where en = ethylenediamine) is chiral and optically active. The trans-isomer is:

The Tanabe-Sugano diagram for a d⁸ octahedral complex shows three spin-allowed transitions. The ground state term symbol for a d⁸ octahedral complex is:

The number of unpaired electrons in the hexafluorocobaltate(III) ion, [CoF₆]³⁻, is:

Which of the following coordination complexes exhibits the strongest Jahn-Teller distortion in an octahedral geometry? (Consider the electronic configurations and the degeneracy of the ground state in each case.)

Which of the following is the correct order of crystal field splitting energy (Δ₀) for the given complexes?

Which of the following is the correct order of magnetic moments for [Fe(H₂O)₆]²⁺, [Fe(CN)₆]⁴⁻, and [Fe(CN)₆]³⁻?

Using Tanabe-Sugano diagrams for d² octahedral complexes, the ground state term symbol for a d² ion in an octahedral field is ³T₁g(F). As the ligand field strength (Δ₀ or 10Dq) increases, the first spin-allowed electronic transition corresponds to which excited state? (The Tanabe-Sugano diagram for d² shows the energy levels as a function of Δ₀/B, where B is the Racah parameter.)

Which of the following is the correct order of magnetic moments for the given complexes? (All involve Fe ions)