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Coordination Compounds

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Introduction and terminology

Subtopic

Introduction and terminology under Coordination Compounds for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    According to Werner's theory of coordination compounds, the 'secondary valency' of a metal atom corresponds to its:

    A.

    Oxidation state

    B.

    Coordination number

    C.

    Ionic charge

    D.

    Magnetic moment

  2. 2.

    Which of the following ligands is an example of a bidentate ligand?

    A.

    Ammonia (NH3NH_3)

    B.

    Oxalate ion (C2O42−C_2O_4^{2-})

    C.

    Chloride ion (Cl−Cl^-)

    D.

    Water (H2OH_2O)

  3. 3.

    In the coordination complex [Pt(NH3)2Cl4][Pt(NH_3)_2Cl_4], what is the coordination number of the central platinum ion?

    A.

    2

    B.

    4

    C.

    6

    D.

    0

Download the worksheet for Coordination Compounds - Introduction and terminology to practice offline. It includes additional chapter-level practice questions.

Werner's theory

Subtopic

Werner's theory under Coordination Compounds for Grade 12 ICSE.

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Preview questions (no answers)

  1. 1.

    Primary valency in coordination compounds is generally satisfied by:

    A.

    Neutral molecules only

    B.

    Anions only

    C.

    Cations only

    D.

    Both neutral molecules and anions

  2. 2.

    Which of the following is responsible for the fixed spatial arrangement (geometry) of ligands around the central metal ion in Werner's theory?

    A.

    Primary valency

    B.

    Secondary valency

    C.

    Ionic bond

    D.

    Oxidation number

  3. 3.

    In the coordination compound [Co(NH3)6]Cl3[Co(NH_3)_6]Cl_3, how many chloride ions will be precipitated as AgClAgCl upon the addition of excess silver nitrate solution?

    A.

    1

    B.

    2

    C.

    3

    D.

    6

Download the worksheet for Coordination Compounds - Werner's theory to practice offline. It includes additional chapter-level practice questions.

Ligands and coordination number

Subtopic

Ligands and coordination number under Coordination Compounds for Grade 12 ICSE.

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Preview questions (no answers)

  1. 1.

    In the coordination compound [Ni(CO)4][Ni(CO)_4], what is the coordination number of the Nickel atom?

    A.

    2

    B.

    4

    C.

    6

    D.

    8

  2. 2.

    An ambidentate ligand is one that can link to the central metal atom through two different atoms. Which of the following is an example of an ambidentate ligand?

    A.

    OH−OH^-

    B.

    H2OH_2O

    C.

    F−F^-

    D.

    CN−CN^-

  3. 3.

    Which of the following ligands is classified as a bidentate ligand?

    A.

    Cl−Cl^-

    B.

    C2O42−C_2O_4^{2-} (Oxalate)

    C.

    NH3NH_3

    D.

    H2OH_2O

Download the worksheet for Coordination Compounds - Ligands and coordination number to practice offline. It includes additional chapter-level practice questions.

IUPAC nomenclature

Subtopic

IUPAC nomenclature under Coordination Compounds for Grade 12 ICSE.

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Preview questions (no answers)

  1. 1.

    What is the IUPAC name of the neutral complex [Ni(CO)4][Ni(CO)_4]?

    A.

    Tetracarbonylnickelate(0)

    B.

    Tetracarbonylnickel(IV)

    C.

    Tetracarbonylnickel(0)

    D.

    Tetracarbonylnickelate(II)

  2. 2.

    Which of the following is the correct IUPAC name for K3[Al(C2O4)3]K_3[Al(C_2O_4)_3]?

    A.

    Potassium trioxalatoaluminium(III)

    B.

    Potassium trioxalatoaluminate(III)

    C.

    Tripotassium trioxalatoaluminate(III)

    D.

    Potassium trioxalatoaluminate(II)

  3. 3.

    The IUPAC name of the complex K4[Fe(CN)6]K_4[Fe(CN)_6] is:

    A.

    Potassium hexacyanoiron(II)

    B.

    Potassium hexacyanidoferrate(II)

    C.

    Tetrapotassium hexacyanidoferrate(II)

    D.

    Potassium hexacyanidoferrate(III)

Download the worksheet for Coordination Compounds - IUPAC nomenclature to practice offline. It includes additional chapter-level practice questions.

Isomerism in coordination compounds

Subtopic

Isomerism in coordination compounds under Coordination Compounds for Grade 12 ICSE.

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Preview questions (no answers)

  1. 1.

    Tetrahedral complexes of the type [MA2B2][MA_2B_2] do not show geometrical isomerism because:

    A.

    The central metal atom is too small

    B.

    All four positions in a tetrahedron are equivalent relative to each other

    C.

    The bond angle is exactly 90∘90^{\circ}

    D.

    The ligands are always trans to each other

  2. 2.

    The pair of compounds [Co(NH3)5SO4]Br[Co(NH_3)_5SO_4]Br and [Co(NH3)5Br]SO4[Co(NH_3)_5Br]SO_4 are examples of:

    A.

    Ionization isomers

    B.

    Coordination isomers

    C.

    Linkage isomers

    D.

    Optical isomers

  3. 3.

    A square planar complex of the type [MA2B2][MA_2B_2] (where A and B are monodentate ligands) can exist as which of the following?

    A.

    Optical isomers only

    B.

    Linkage isomers only

    C.

    Geometrical isomers (cis and trans)

    D.

    Ionization isomers only

Download the worksheet for Coordination Compounds - Isomerism in coordination compounds to practice offline. It includes additional chapter-level practice questions.

Valence Bond Theory (VBT)

Subtopic

Valence Bond Theory (VBT) under Coordination Compounds for Grade 12 ICSE.

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Preview questions (no answers)

  1. 1.

    What is the geometry of a coordination complex where the central metal atom undergoes dsp2dsp^2 hybridization?

    A.

    Tetrahedral

    B.

    Square planar

    C.

    Trigonal bipyramidal

    D.

    Octahedral

  2. 2.

    Which of the following ligands is most likely to act as a strong field ligand, causing the pairing of electrons in the central metal ion during complex formation?

    A.

    Cl−Cl^-

    B.

    F−F^-

    C.

    CN−CN^-

    D.

    OH−OH^-

  3. 3.

    In an inner orbital octahedral complex, which dd-orbitals are utilized during hybridization?

    A.

    (n−1)d(n-1)d orbitals

    B.

    ndnd orbitals

    C.

    (n+1)d(n+1)d orbitals

    D.

    (n−2)d(n-2)d orbitals

Download the worksheet for Coordination Compounds - Valence Bond Theory (VBT) to practice offline. It includes additional chapter-level practice questions.

Crystal Field Theory (CFT)

Subtopic

Crystal Field Theory (CFT) under Coordination Compounds for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following ligands is classified as a 'strong field ligand' in the spectrochemical series?

    A.

    Cl−Cl^-

    B.

    H2OH_2O

    C.

    CN−CN^-

    D.

    F−F^-

  2. 2.

    According to Crystal Field Theory, what is the approximate relationship between the crystal field splitting energy for tetrahedral complexes (Δt\Delta_t) and octahedral complexes (Δo\Delta_o)?

    A.

    Δt=49Δo\Delta_t = \frac{4}{9} \Delta_o

    B.

    Δt=94Δo\Delta_t = \frac{9}{4} \Delta_o

    C.

    Δt=12Δo\Delta_t = \frac{1}{2} \Delta_o

    D.

    Δt=Δo\Delta_t = \Delta_o

  3. 3.

    What is the Crystal Field Stabilization Energy (CFSE) for a metal ion with a d1d^1 configuration in an octahedral field?

    A.

    −0.4Δo-0.4 \Delta_o

    B.

    −0.6Δo-0.6 \Delta_o

    C.

    +0.4Δo+0.4 \Delta_o

    D.

    0.0Δo0.0 \Delta_o

Download the worksheet for Coordination Compounds - Crystal Field Theory (CFT) to practice offline. It includes additional chapter-level practice questions.

Stability of coordination compounds

Subtopic

Stability of coordination compounds under Coordination Compounds for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    If K1,K2,K3,K_1, K_2, K_3, and K4K_4 are the stepwise stability constants for the formation of [Cu(NH3)4]2+[Cu(NH_3)_4]^{2+}, how is the overall stability constant (β4\beta_4) related to them?

    A.

    β4=K1+K2+K3+K4\beta_4 = K_1 + K_2 + K_3 + K_4

    B.

    β4=K1×K2×K3×K4\beta_4 = K_1 \times K_2 \times K_3 \times K_4

    C.

    β4=(K1×K2)/(K3×K4)\beta_4 = (K_1 \times K_2) / (K_3 \times K_4)

    D.

    β4=1K1×K2×K3×K4\beta_4 = \frac{1}{K_1 \times K_2 \times K_3 \times K_4}

  2. 2.

    The increase in stability of a complex due to the presence of multidentate ligands that form rings with the metal ion is known as:

    A.

    The Inductive effect

    B.

    The Resonance effect

    C.

    The Steric effect

    D.

    The Chelate effect

  3. 3.

    Which of the following complexes is expected to be more stable due to the higher charge density on the central metal ion?

    A.

    [Fe(CN)6]4−[Fe(CN)_6]^{4-}

    B.

    [Fe(CN)6]3−[Fe(CN)_6]^{3-}

    C.

    [Ni(NH3)6]2+[Ni(NH_3)_6]^{2+}

    D.

    [Cd(NH3)4]2+[Cd(NH_3)_4]^{2+}

Download the worksheet for Coordination Compounds - Stability of coordination compounds to practice offline. It includes additional chapter-level practice questions.