Inorganic Chemistry Coordination Compounds Mock Tests

Which of the following complex ions has the highest magnetic moment? (Spin-only formula: μ = √[n(n+2)] BM)

The most common oxidation state of lanthanides is:

The most common oxidation state of transition metals is:

The lanthanoid contraction is responsible for which of the following observations?

The complex [CoF₆]³⁻ is paramagnetic while [Co(CN)₆]³⁻ is diamagnetic. The explanation lies in:

How many of the following species are isoelectronic with Ni(CO)₄ (28 + 4×2 = 36 e⁻)? Cr(CO)₆, Fe(CO)₅, V(CO)₆, [Mn(CO)₄]⁺, [Co(CO)₄]⁻, Ni(NO)₂ (NO as neutral 3e⁻ donor), [Fe(CO)₄]²⁻

Which of the following sets of complexes shows geometrical isomerism AND are both diamagnetic? (1) [PtCl₂(NH₃)₂] (2) [ZnCl₄]²⁻ (3) [Ni(CN)₄]²⁻ (4) [CuCl₄]²⁻ (5) [Fe(CN)₆]⁴⁻

The spin-only magnetic moment of [FeF₆]³⁻ is 5.92 BM and that of [Fe(CN)₆]³⁻ is 1.73 BM. Which of the following statements correctly explains this difference? (A) F⁻ is a weak field ligand causing high spin configuration (B) CN⁻ is a strong field ligand causing low spin configuration (C) The geometry of both complexes is different (D) Fe has different oxidation states in the two complexes