Question 1

The ion [Co(NH3)6]2+ is octahedral and high spin. This complex is

Accepted Answer

A)  paramagnetic, with 1 unpaired electron. 
B)  paramagnetic, with 3 unpaired electrons. 
C)  paramagnetic, with 4 unpaired electrons. 
D)  paramagnetic, with 5 unpaired electrons. 
E)  diamagnetic. 
A)  paramagnetic, with 1 unpaired electron. 
B)  paramagnetic, with 3 unpaired electrons. 
C)  paramagnetic, with 4 unpaired electrons. 
D)  paramagnetic, with 5 unpaired electrons. 
E)  diamagnetic.

Question 2

The electron configuration of a Ti atom is

Accepted Answer

A)  [Ne]3s23d2. 
B)  [Ne] 3s24d2. 
C)  [Ar]4s23d2. 
D)  [Ar]4s24d2. 
E)  [Ar]3d4. 
A)  [Ne]3s23d2. 
B)  [Ne] 3s24d2. 
C)  [Ar]4s23d2. 
D)  [Ar]4s24d2. 
E)  [Ar]3d4.

Question 3

How many geometric isomers are possible for the complex [CrF3Br3]3-

Accepted Answer

A)  None, only one structure is possible 
B)  Two 
C)  Three 
D)  Four 
E)  None of the above 
A)  None, only one structure is possible 
B)  Two 
C)  Three 
D)  Four 
E)  None of the above

Question 4

The neutral monodentate ligand L forms the complex ion [CrL6]2+, and the magnetic properties of this complex correspond to 2 unpaired electrons. This indicates that L is a strong-field ligand.

Accepted Answer

A) True 
 B)False

Question 5

The coordination compound shown below has

Accepted Answer

A)  two monodentate ligands and two bidentate ligands. 
B)  three monodentate ligands and two bidentate ligands. 
C)  four monodentate ligands and two bidentate ligands. 
D)  one monodentate ligand and four bidentate ligands. 
E)  four bidentate ligands. 
A)  two monodentate ligands and two bidentate ligands. 
B)  three monodentate ligands and two bidentate ligands. 
C)  four monodentate ligands and two bidentate ligands. 
D)  one monodentate ligand and four bidentate ligands. 
E)  four bidentate ligands.

Question 6

Consider the [CoCl6]4- ion. Determine which responses are true statements.
I. The oxidation number of Co is -4.
II. The coordination number of cobalt is 6.
III. It is paramagnetic.
IV. It is a low-spin complex.

Accepted Answer

A)  I, II, III, IV 
B)  I, IV 
C)  II, III 
D)  I, III 
E)  III, IV 
A)  I, II, III, IV 
B)  I, IV 
C)  II, III 
D)  I, III 
E)  III, IV

Question 7

Which one of these complex ions would absorb light with the shortest wavelength

Accepted Answer

A)  [Co(H2O)6]2+ 
B)  [Co(NH3)6]2+ 
C)  [CoF6]4- 
D)  [Co(CN)6]4- 
E)  [Co(en)6]2+ 
A)  [Co(H2O)6]2+ 
B)  [Co(NH3)6]2+ 
C)  [CoF6]4- 
D)  [Co(CN)6]4- 
E)  [Co(en)6]2+

Question 8

How many unpaired electrons does the manganese ion have in [Mn(CN)6]4-

Accepted Answer

A)  1 unpaired electron 
B)  2 unpaired electrons 
C)  3 unpaired electrons 
D)  5 unpaired electrons 
E)  No unpaired electrons 
A)  1 unpaired electron 
B)  2 unpaired electrons 
C)  3 unpaired electrons 
D)  5 unpaired electrons 
E)  No unpaired electrons

Question 9

Which of the following choices can function as a bidentate ligand

Accepted Answer

A)  PH3 
B)  Cl- 
C)  CN- 
D)  -OCH2CH2CH2O- 
E)  CO 
A)  PH3 
B)  Cl- 
C)  CN- 
D)  -OCH2CH2CH2O- 
E)  CO

Question 10

In the complex ion [Co(en)2Br2]+, the oxidation number of Co is

Accepted Answer

A)  +1. 
B)  +2. 
C)  +3. 
D)  -2. 
E)  -1. 
A)  +1. 
B)  +2. 
C)  +3. 
D)  -2. 
E)  -1.

Question 11

A complex with the composition [MA2B2]X2 is found to have no geometrical isomers. Both A and B are monodentate ligands. The structure of the complex is

Accepted Answer

A)  linear. 
B)  square planar. 
C)  tetrahedral. 
D)  octahedral. 
A)  linear. 
B)  square planar. 
C)  tetrahedral. 
D)  octahedral.

Question 12

Two complex ions containing Ni are [Ni(NH3)6]2+, which is blue, and [Ni(en)3]2+, which is purple. Which one of these statements is true

Accepted Answer

A)  The crystal field splitting energy (
D)  is greater for [Ni(NH3)6]2+ than for [Ni(en)3]2+. 
B)  [Ni(en)3]2+ absorbs light in the violet region of the spectrum. 
C)  Both complex ions are diamagnetic. 
D)  The energy of the photon absorbed by [Ni(en)3]2+ is greater than that absorbed by [Ni(NH3)6]2+. 
E)  The wavelength of the light absorbed by [Ni(en)3]2+ is greater than the wavelength absorbed by [Ni(NH3)6]2+. 
A)  The crystal field splitting energy (
D)  is greater for [Ni(NH3)6]2+ than for [Ni(en)3]2+. 
B)  [Ni(en)3]2+ absorbs light in the violet region of the spectrum. 
C)  Both complex ions are diamagnetic. 
D)  The energy of the photon absorbed by [Ni(en)3]2+ is greater than that absorbed by [Ni(NH3)6]2+. 
E)  The wavelength of the light absorbed by [Ni(en)3]2+ is greater than the wavelength absorbed by [Ni(NH3)6]2+.

The ion [Co(NH₃)₆]²⁺ is octahedral and high spin. This complex is

The electron configuration of a Ti atom is

How many geometric isomers are possible for the complex [CrF₃Br₃]^3-

The neutral monodentate ligand L forms the complex ion [CrL₆]²⁺, and the magnetic properties of this complex correspond to 2 unpaired electrons. This indicates that L is a strong-field ligand.

The coordination compound shown below has

Consider the [CoCl₆]^4- ion. Determine which responses are true statements. I. The oxidation number of Co is -4. II. The coordination number of cobalt is 6. III. It is paramagnetic. IV. It is a low-spin complex.

Which one of these complex ions would absorb light with the shortest wavelength

How many unpaired electrons does the manganese ion have in [Mn(CN)₆]^4-

Which of the following choices can function as a bidentate ligand

In the complex ion [Co(en)₂Br₂]⁺, the oxidation number of Co is

A complex with the composition [MA₂B₂]X₂ is found to have no geometrical isomers. Both A and B are monodentate ligands. The structure of the complex is

Two complex ions containing Ni are [Ni(NH₃)₆]²⁺, which is blue, and [Ni(en)₃]²⁺, which is purple. Which one of these statements is true

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Exam 23: Transition Metals Chemistry and Coordination Compounds

The ion [Co(NH3)6]2+ is octahedral and high spin. This complex is

The electron configuration of a Ti atom is

How many geometric isomers are possible for the complex [CrF3Br3]3-

The neutral monodentate ligand L forms the complex ion [CrL6]2+, and the magnetic properties of this complex correspond to 2 unpaired electrons. This indicates that L is a strong-field ligand.

The coordination compound shown below has

Consider the [CoCl6]4- ion. Determine which responses are true statements. I. The oxidation number of Co is -4. II. The coordination number of cobalt is 6. III. It is paramagnetic. IV. It is a low-spin complex.

Which one of these complex ions would absorb light with the shortest wavelength

How many unpaired electrons does the manganese ion have in [Mn(CN)6]4-

Which of the following choices can function as a bidentate ligand

In the complex ion [Co(en)2Br2]+, the oxidation number of Co is

A complex with the composition [MA2B2]X2 is found to have no geometrical isomers. Both A and B are monodentate ligands. The structure of the complex is

Two complex ions containing Ni are [Ni(NH3)6]2+, which is blue, and [Ni(en)3]2+, which is purple. Which one of these statements is true

Chemistry: The Study of Change

Atoms Molecules and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Hybridization of Atomic

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

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The ion [Co(NH₃)₆]²⁺ is octahedral and high spin. This complex is

How many geometric isomers are possible for the complex [CrF₃Br₃]^3-

The neutral monodentate ligand L forms the complex ion [CrL₆]²⁺, and the magnetic properties of this complex correspond to 2 unpaired electrons. This indicates that L is a strong-field ligand.

Consider the [CoCl₆]^4- ion. Determine which responses are true statements. I. The oxidation number of Co is -4. II. The coordination number of cobalt is 6. III. It is paramagnetic. IV. It is a low-spin complex.

How many unpaired electrons does the manganese ion have in [Mn(CN)₆]^4-

In the complex ion [Co(en)₂Br₂]⁺, the oxidation number of Co is

A complex with the composition [MA₂B₂]X₂ is found to have no geometrical isomers. Both A and B are monodentate ligands. The structure of the complex is

Two complex ions containing Ni are [Ni(NH₃)₆]²⁺, which is blue, and [Ni(en)₃]²⁺, which is purple. Which one of these statements is true