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KEAM Coordination Compounds — practice questions — page 3

Explore 109 free Coordination Compounds questions in KEAM Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Coordination Compounds questions and exercises with answers

Showing questions 61–90 of 109.

Name of complex K3[Fe(CN)6]:Read the answer and worked solution →For [Cu(NH3)4(H2O)2]²⁺ (octahedral with 4 NH3 equatorial + 2 H2O axial), this is:Read the answer and worked solution →In coordination compound [Cu(NH₃)₄]SO₄, the central metal is:Read the answer and worked solution →Coordination number of a metal is:Read the answer and worked solution →Denticity of a ligand refers to:Read the answer and worked solution →Werner's coordination theory introduced primary and secondary valencies. Primary valency corresponds to:Read the answer and worked solution →Oxidation state of Cr in [Cr(NH₃)₆]Cl₃:Read the answer and worked solution →EDTA is a:Read the answer and worked solution →In [Co(NH₃)₆]Cl₃, the number of ionizable Cl⁻ in solution is:Read the answer and worked solution →Isomerism where ligands occupy different positions in a square planar complex:Read the answer and worked solution →In Werner's compound CoCl₃·6NH₃, all NH₃ are bound to Co. Coordination number:Read the answer and worked solution →Crystal field splitting for d-orbitals in octahedral field. The five d orbitals split into:Read the answer and worked solution →Spectrochemical series ranks ligands by CFSE strength. Order (low to high):Read the answer and worked solution →IUPAC name for [Co(NH₃)₅Cl]Cl₂:Read the answer and worked solution →For [Fe(CN)₆]⁴⁻ (low spin), magnetic moment:Read the answer and worked solution →Magnetic moment for [Mn(H₂O)₆]²⁺ (high spin, d⁵):Read the answer and worked solution →Crystal Field Stabilization Energy (CFSE) for high-spin d⁵ octahedral:Read the answer and worked solution →Geometrical isomers of [Pt(NH₃)₂Cl₂] (square planar):Read the answer and worked solution →Optical isomers of [Co(en)₃]³⁺ (en = ethylenediamine):Read the answer and worked solution →Number of unpaired electrons in [Co(NH₃)₆]³⁺ (Co³⁺ is d⁶, strong field NH₃ → low spin):Read the answer and worked solution →Effective Atomic Number (EAN) of metal in [Ni(CO)₄]:Read the answer and worked solution →For octahedral d⁴ ion in strong field, electronic config:Read the answer and worked solution →Pop the ligands out of the mixRead the answer and worked solution →Sort each ligand by how many donor atoms it usesRead the answer and worked solution →Match each term to its definitionRead the answer and worked solution →True or false: coordination numberRead the answer and worked solution →Counting the coordination numberRead the answer and worked solution →Match each complex to its shapeRead the answer and worked solution →Sort each complex by its geometryRead the answer and worked solution →Complete the coordination sphere ruleRead the answer and worked solution →

Worked practice questions

Name of complex K3[Fe(CN)6]:

  1. Potassium ferrocyanide
  2. Potassium iron cyanide
  3. Potassium hexacyanoferrate(III) or potassium ferricyanide
  4. Iron potassium cyanide
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Correct answer: C. Potassium hexacyanoferrate(III) or potassium ferricyanide

K3[Fe(CN)6]: 3 K⁺ counter ions, complex anion [Fe(CN)6]³⁻. CN⁻ × 6 = -6, charge -3 → Fe oxidation state = +3. IUPAC: potassium hexacyanoferrate(III). **Old name:** potassium ferricyanide.

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For [Cu(NH3)4(H2O)2]²⁺ (octahedral with 4 NH3 equatorial + 2 H2O axial), this is:

  1. Trans isomer (the two H2O are on opposite ends)
  2. Random configuration
  3. Cis isomer
  4. Three isomers possible
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Correct answer: A. Trans isomer (the two H2O are on opposite ends)

With 4 identical NH3 in equatorial plane and 2 H2O on opposite ends (axial positions), the H2O ligands are trans to each other. This is the trans isomer. (Compare with cis where two H2O would be adjacent at 90 degrees.)

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In coordination compound [Cu(NH₃)₄]SO₄, the central metal is:

  1. N
  2. O
  3. S
  4. Cu
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Correct answer: D. Cu

Central metal atom is Cu. NH₃ molecules act as ligands. SO₄²⁻ is the counter ion. Coordination number = 4 (four NH₃ molecules).

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