Question 1

Which of these diagrams represent the crystal field splitting between d orbitals in a tetrahedral complex?

Accepted Answer

A)   
B)   
C)   
D)   E) None of the above
F) B) and C)

Question 2

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.F) A) and E)
G) B) and C)

Question 3

Which of the following will be paramagnetic?

Accepted Answer

A)   V5+
B)   Ni2+
C)   Mn7+
D)   Ti4+
E)   Zn2+F) A) and B)
G) C) and E)

Question 4

Write the formula for diamminedichloroethylenediaminecobalt(III)  bromide.

Accepted Answer

A)   [CoCl2(en) (NH3) 2]Br
B)   [CoCl2(en) (NH3)  2]Br2
C)   [CoCl2(en) 2(NH3) 2]Br
D)   [CoCl2(en) 2(NH3) 2]Br2
E)   (NH3) 2Cl2(en) Co3BrF) A) and C)
G) All of the above

Question 5

How many 3d electrons does a ground-state Sc3+ ion have?

Accepted Answer

A)   1
B)   3
C)   2
D)   10
E)   0F) A) and D)
G) B) and C)

Question 6

In K4[Fe(CN) 6], how many 3d electrons does the iron atom have?

Accepted Answer

A)   3
B)   4
C)   5
D)   6
E)   7F) All of the above
G) B) and C)

Question 7

Which of the following ligands has two different types of donor atoms?

Accepted Answer

A)   NH3
B)   H2O
C)   NH4+
D)   NO2-
E)   ethylenediamineF) A) and E)
G) A) and D)

Question 8

Octahedral complexes can exhibit geometric and optical isomerism.

Accepted Answer

A) True 
 B)False

Question 9

An equimolar mixture (50:50 ratio) of two enantiomers is called a(n) ________ ________.

Accepted Answer

The answer of An equimolar mixture (50:50 ratio) of two...

Question 10

What is the name of the atom in a ligand that is bound directly to the metal atom?

Accepted Answer

A)   Acceptor atom
B)   Donor atom
C)   Chelating atom
D)   Coordinator
E)   Chelating agentF) A) and D)
G) None of the above

Question 11

If the plane of polarization is rotated to the right then the isomer is ________.

Accepted Answer

The answer of If the plane of polarization is rotated...

Question 12

How many geometric isomers can the following square-planar complex have?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   6F) B) and E)
G) All of the above

Question 13

The following energy-level diagram could correspond to which coordination compound?

Accepted Answer

A)   hexabromomanganate(II) 
B)   hexacyanoferrate(II) 
C)   hexacyanoferrate(III) 
D)   hexabromomanganate(IV) 
E)   hexachlorochromate(II) F) C) and E)
G) A) and D)

Question 14

In the coordination compound [Co(en) 2Cl2]Cl, the coordination number and oxidation number of the central atom are ________ and ________, respectively.

Accepted Answer

A)   4; +3
B)   6; +2
C)   4; +2
D)   6; +3
E)   4; +1F) A) and B)
G) A) and C)

Question 15

In the coordination compound [Pt(NH3) 2Cl2], the coordination number and oxidation number of the central atom are ________ and ________, respectively.

Accepted Answer

A)   2; 0
B)   4; +4
C)   5; 0
D)   4; +2
E)   6; +2F) A) and D)
G) B) and E)

Question 16

How many 3d electrons does a ground-state Fe3+ ion have?

Accepted Answer

A)   3
B)   5
C)   6
D)   7
E)   9F) None of the above
G) A) and B)

Question 17

What is the label used for an isomer which is levorotatory?

Accepted Answer

The answer of What is the label used for an...

Question 18

Iron(III)  forms an octahedral complex with the ligand CN-. How many unpaired electrons are in the d orbitals of iron?

Accepted Answer

A)   1
B)   3
C)   5
D)   7
E)   9F) A) and C)
G) A) and E)

Question 19

The maximum oxidation state of an element in the first transition series never exceeds its group number.

Accepted Answer

A) True 
 B)False

Question 20

The crystal field splitting energy, Δ,

Accepted Answer

A)   is larger for tetrahedral complexes than for octahedral complexes.
B)   depends on the metal but not on the ligand.
C)   determines the color of a complex.
D)   is larger for ionic ligands like chloride than for molecular ligands like carbon monoxide, CO.
E)   determines the charge of a complex.F) C) and D)
G) A) and E)

Exam 22: Coordination Chemistry

If the plane of polarization is rotated to the right then the isomer is ________.

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Octahedral complexes can exhibit geometric and optical isomerism.

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What is the label used for an isomer which is levorotatory?

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The following energy-level diagram could correspond to which coordination compound?

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In the coordination compound [Co(en) 2Cl2]Cl, the coordination number and oxidation number of the central atom are ________ and ________, respectively.

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An equimolar mixture (50:50 ratio) of two enantiomers is called a(n) ________ ________.

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Iron(III) forms an octahedral complex with the ligand CN-. How many unpaired electrons are in the d orbitals of iron?

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The crystal field splitting energy, Δ,

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Write the formula for diamminedichloroethylenediaminecobalt(III) bromide.

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Which of these diagrams represent the crystal field splitting between d orbitals in a tetrahedral complex?

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

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Which of the following ligands has two different types of donor atoms?

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The maximum oxidation state of an element in the first transition series never exceeds its group number.

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What is the name of the atom in a ligand that is bound directly to the metal atom?

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Which of the following will be paramagnetic?

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How many 3d electrons does a ground-state Sc3+ ion have?

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In the coordination compound [Pt(NH3) 2Cl2], the coordination number and oxidation number of the central atom are ________ and ________, respectively.

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How many geometric isomers can the following square-planar complex have?

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In K4[Fe(CN) 6], how many 3d electrons does the iron atom have?

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How many 3d electrons does a ground-state Fe3+ ion have?

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In the coordination compound [Co(en) ₂Cl₂]Cl, the coordination number and oxidation number of the central atom are and , respectively.

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An equimolar mixture (50:50 ratio) of two enantiomers is called a(n) .

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Iron(III) forms an octahedral complex with the ligand CN^-. How many unpaired electrons are in the d orbitals of iron?

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

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How many 3d electrons does a ground-state Sc³⁺ ion have?

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In the coordination compound [Pt(NH₃) ₂Cl₂], the coordination number and oxidation number of the central atom are and , respectively.

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In K₄[Fe(CN) ₆], how many 3d electrons does the iron atom have?

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How many 3d electrons does a ground-state Fe³⁺ ion have?

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