Coordination Compounds Questions

31 Practice QuestionsStart Practicing Now

[Easy]The oxygen-carrying pigment haemoglobin owes its function to a coordination complex; which central metal ion sits at the heart of its haem unit?...
[Medium]The metal-carbon bond in metal carbonyls is unusually strong because of an additional interaction beyond simple sigma donation; what is this interacti...
[Medium]A complex containing the bidentate ligand ethylenediamine is more stable than the comparable complex with ammonia ligands; what explains this enhanced...
[Easy]Inside the complex anion present in potassium hexafluoridocobaltate, what is the oxidation state of cobalt given fluoride and potassium charges?...
[Medium]A central metal ion is surrounded by four ligands and the complex is found to be diamagnetic with a square planar shape; which hybridisation fits this...
[Easy]Pentaamminenitrito-cobalt(III) can bind the nitrite ligand through nitrogen or through oxygen, producing two coloured forms; this behaviour is called ...
[Medium]Two compounds with formula CoBrSO4.5NH3 give different precipitates with barium chloride and with silver nitrate respectively; which isomerism do they...
[Medium]A square planar complex of formula [Pt(NH3)2Cl2] is known to exist in two distinct forms; what type of isomerism does this illustrate?...
[Easy]Among the ligands iodide, fluoride, water and cyanide, which one produces the largest crystal field splitting around a given metal ion?...
[Medium]In an octahedral crystal field, the five degenerate d orbitals split into two sets; which orbitals are raised to the higher-energy e_g level?...
[Medium]A tetrahedral nickel complex has two unpaired electrons; using the spin-only formula, what is its approximate magnetic moment in Bohr magnetons?...
[Medium]The octahedral complex [Co(NH3)6]^{3+} is found to be diamagnetic; which hybridisation of cobalt does valence bond theory assign to it?...
[Medium]For the neutral carbonyl complex of nickel, [Ni(CO)4], what is the effective atomic number of the central nickel atom?...
[Easy]A chemist describes ethylenediaminetetraacetate as a powerful sequestering agent for metal ions in hard water treatment; what is its denticity?...
[Easy]According to IUPAC rules for naming coordination compounds, what is the correct systematic name of the complex K3[Fe(CN)6]?...
[Easy]When excess silver nitrate is added to one mole of the complex CoCl3.6NH3 in aqueous solution, how many moles of AgCl are precipitated?...
[Easy]Which type of isomerism is shown by [Co(NH₃)₅NO₂]Cl₂ and [Co(NH₃)₅ONO]Cl₂?...
[Easy]Low spin complexes are formed with:...
[Easy]In the spectrochemical series, the correct order of ligand strength is:...
[Medium]Chelate complexes are more stable than similar non-chelate complexes due to:...
[Medium]Geometrical isomerism is possible in:...
[Medium]The IUPAC name of [Pt(NH₃)₂Cl₂] is:...
[Medium][Co(NH₃)₆][Cr(CN)₆] and [Cr(NH₃)₆][Co(CN)₆] are examples of:...
[Medium]In an octahedral crystal field, the d-orbitals split into:...
[Medium]The effective atomic number (EAN) of Fe in [Fe(CN)₆]⁴⁻ is:...
[Easy]A high value of formation constant (K) indicates:...
[Medium]Which complex shows optical isomerism?...
[Easy]Which of the following is a bidentate ligand?...
[Hard]The hybridization of Ni in [Ni(CN)₄]²⁻ is:...
[Easy]EDTA is used in chelation therapy to remove:...
[Easy]According to Werner's theory, in [Co(NH₃)₆]Cl₃, the coordination number of Co is:...