Question 1

What transition metal is used in magnets, catalysts, and drill bits?

Accepted Answer

A)  platinum 
B)  nickel 
C)  copper 
D)  cobalt 
E)  titanium

Question 2

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species.
-K4Fe(CN)6

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 3

A certain complex ion has a distorted octahedral structure in which the ligands along the plus and minus z axes are compressed (pushed in closer to the central metal ion). The d orbital splitting diagram for this complex ion would be

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 4

The color of a transition metal complex results from

Accepted Answer

A)  nuclear magnetic resonance. 
B)  transition of an electron between d orbitals. 
C)  bending vibrations. 
D)  stretching vibrations. 
E)  transition of an electron between an s orbital and a p orbital.

Question 5

Which of the following complexes would be diamagnetic (all electrons paired)?

Accepted Answer

A)  Fe(CN)6]4- 
B)  Mn(CN)6]4- 
C)  V(CN)6]3- 
D)  [Cr(CN)6]3-

Question 6

Which model(s) account(s) for the magnetism and color of coordination compounds?
I.the localized electron model
II.the crystal field model

Accepted Answer

A)  both I and II 
B)  neither I nor II 
C)  II only 
D)  I only

Question 7

Which of the following statements is/are true of predictions about formation of molecular orbitals?
1. Atomic orbitals must have a net overlap in space to form molecular orbitals.
2. Atomic orbitals that are close in energy will interact more strongly than those widely separated in energy.
3. Atomic orbitals that are close in energy will interact less strongly than those widely separated in energy.​

Accepted Answer

A)  ​1 and 2 
B)  ​2 only 
C)  ​1 and 3 
D)  ​3 only 
E)  ​1 only

Question 8

How many unpaired electrons are there in the complex ion [Co(NO3)6]4-? For this ion, the nitrate ligands produce a very strong crystal field.

Accepted Answer

A)  4 
B)  5 
C)  3 
D)  2 
E)  1

Question 9

Which of the following statements is/are true of hemoglobin?
1. The transport of O2 in the blood is carried out by hemoglobin.
2. Each hemoglobin can bind seven O2 molecule.
3. Hemoglobin consists of two myoglobin-like units.

Accepted Answer

A)  ​1 only 
B)  ​2 only 
C)  ​3 only 
D)  ​1 and 2 
E)  ​2 and 3

Question 10

How many unpaired electrons are there in a complex ion having a d5 electron configuration and an octahedral geometry in the weak-field case?

Accepted Answer

A)  2 
B)  1 
C)  3 
D)  5 
E)  4

Question 11

Which of the following statements is true about coordination complexes?

Accepted Answer

A)  When the ligands approach a transition metal ion in an octahedral field, the dxz, dyz, and dxy atomic orbitals are affected the least by the ligands. 
B)  The metal is a Lewis base and the ligands are Lewis acids. 
C)  Only complexes with coordination number 6 are found in nature. 
D)  None of these is true. 
E)  All of these are true.

Question 12

In _________, the isomers contain the same atoms, but one or more bonds differ.

Accepted Answer

The answer of In _________, the isomers contain the same...

Question 13

How many unpaired electrons are found in MnCl42- (tetrahedral)?

Accepted Answer

A)  5 
B)  0 
C)  2 
D)  1 
E)  4

Question 14

Which has the greater number of unpaired electrons?
I. square planar Ni(CN)42-
II. tetrahedral FeCl4-

Accepted Answer

A)  I 
B)  II 
C)  Neither I nor II has any unpaired electrons. 
D)  More information is needed. 
E)  Both I and II have the same (nonzero) number of unpaired electrons.

Question 15

For the process Co(NH3)5Cl2+ + Cl- → Co(NH3)4Cl2+ + NH3, what would be the ratio of cis to trans isomers in the product?

Accepted Answer

A)  4:1 
B)  1:1 
C)  2:1 
D)  1:2 
E)  1:4

Question 16

A d6 ion (Fe2+) is complexed with six strong-field ligands (for example, SCN-). What is the number of unpaired electrons in this complex?

Accepted Answer

A)  3 
B)  2 
C)  0 
D)  1 
E)  4

Question 17

Use the crystal field model to explain why solutions with Ag⁺ are colorless..

Accepted Answer

The answer of Use the crystal field model to explain...

Question 18

A metal ion in a high-spin octahedral complex has two more unpaired electrons than the same ion does in a low-spin octahedral complex. Which of the following could the metal ion be?

Accepted Answer

A)  Cr3+ 
B)  Mn2+ 
C)  Co2+ 
D)  Ti2+ 
E)  Cu2+

Question 19

Which of the following crystal field diagrams is correct for Mn(CN)63- , where CN- is a strong-field ligand?

Accepted Answer

A)   
B)   
C)   
D)   
E)  none of these

Question 20

How many unpaired electrons are found in Fe(en)32+ (strong field)?

Accepted Answer

A)  5 
B)  1 
C)  2 
D)  0 
E)  4

Exam 19: Transition Metals and Coordination Chemistry

What transition metal is used in magnets, catalysts, and drill bits?

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -K₄Fe(CN) ₆

A certain complex ion has a distorted octahedral structure in which the ligands along the plus and minus z axes are compressed (pushed in closer to the central metal ion) . The d orbital splitting diagram for this complex ion would be

The color of a transition metal complex results from

Which of the following complexes would be diamagnetic (all electrons paired) ?

Which model(s) account(s) for the magnetism and color of coordination compounds? I.the localized electron model II.the crystal field model

How many unpaired electrons are there in the complex ion [Co(NO₃) ₆]^4-? For this ion, the nitrate ligands produce a very strong crystal field.

Which of the following statements is/are true of hemoglobin? 1. The transport of O₂ in the blood is carried out by hemoglobin. 2. Each hemoglobin can bind seven O₂ molecule. 3. Hemoglobin consists of two myoglobin-like units.

How many unpaired electrons are there in a complex ion having a d⁵ electron configuration and an octahedral geometry in the weak-field case?

Which of the following statements is true about coordination complexes?

In _________, the isomers contain the same atoms, but one or more bonds differ.

How many unpaired electrons are found in MnCl₄^2- (tetrahedral) ?

Which has the greater number of unpaired electrons? I. square planar Ni(CN) ₄^2- II. tetrahedral FeCl₄^-

For the process Co(NH₃) ₅Cl²⁺ + Cl^- → Co(NH₃) ₄Cl₂⁺ + NH₃, what would be the ratio of cis to trans isomers in the product?

A d⁶ ion (Fe²⁺) is complexed with six strong-field ligands (for example, SCN^-) . What is the number of unpaired electrons in this complex?

Use the crystal field model to explain why solutions with Ag⁺ are colorless..

A metal ion in a high-spin octahedral complex has two more unpaired electrons than the same ion does in a low-spin octahedral complex. Which of the following could the metal ion be?

Which of the following crystal field diagrams is correct for Mn(CN) ₆^3- , where CN^- is a strong-field ligand?

How many unpaired electrons are found in Fe(en) ₃²⁺ (strong field) ?

Exam 19: Transition Metals and Coordination Chemistry

What transition metal is used in magnets, catalysts, and drill bits?

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -K4Fe(CN) 6

A certain complex ion has a distorted octahedral structure in which the ligands along the plus and minus z axes are compressed (pushed in closer to the central metal ion) . The d orbital splitting diagram for this complex ion would be

The color of a transition metal complex results from

Which of the following complexes would be diamagnetic (all electrons paired) ?

Which model(s) account(s) for the magnetism and color of coordination compounds? I.the localized electron model II.the crystal field model

How many unpaired electrons are there in the complex ion [Co(NO3) 6]4-? For this ion, the nitrate ligands produce a very strong crystal field.

Which of the following statements is/are true of hemoglobin? 1. The transport of O2 in the blood is carried out by hemoglobin. 2. Each hemoglobin can bind seven O2 molecule. 3. Hemoglobin consists of two myoglobin-like units.

How many unpaired electrons are there in a complex ion having a d5 electron configuration and an octahedral geometry in the weak-field case?

Which of the following statements is true about coordination complexes?

In _________, the isomers contain the same atoms, but one or more bonds differ.

How many unpaired electrons are found in MnCl42- (tetrahedral) ?

Which has the greater number of unpaired electrons? I. square planar Ni(CN) 42- II. tetrahedral FeCl4-

For the process Co(NH3) 5Cl2+ + Cl- → Co(NH3) 4Cl2+ + NH3, what would be the ratio of cis to trans isomers in the product?

A d6 ion (Fe2+) is complexed with six strong-field ligands (for example, SCN-) . What is the number of unpaired electrons in this complex?

Use the crystal field model to explain why solutions with Ag+ are colorless..

A metal ion in a high-spin octahedral complex has two more unpaired electrons than the same ion does in a low-spin octahedral complex. Which of the following could the metal ion be?

Which of the following crystal field diagrams is correct for Mn(CN) 63- , where CN- is a strong-field ligand?

How many unpaired electrons are found in Fe(en) 32+ (strong field) ?

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -K₄Fe(CN) ₆

How many unpaired electrons are there in the complex ion [Co(NO₃) ₆]^4-? For this ion, the nitrate ligands produce a very strong crystal field.

Which of the following statements is/are true of hemoglobin? 1. The transport of O₂ in the blood is carried out by hemoglobin. 2. Each hemoglobin can bind seven O₂ molecule. 3. Hemoglobin consists of two myoglobin-like units.

How many unpaired electrons are there in a complex ion having a d⁵ electron configuration and an octahedral geometry in the weak-field case?

How many unpaired electrons are found in MnCl₄^2- (tetrahedral) ?

Which has the greater number of unpaired electrons? I. square planar Ni(CN) ₄^2- II. tetrahedral FeCl₄^-

For the process Co(NH₃) ₅Cl²⁺ + Cl^- → Co(NH₃) ₄Cl₂⁺ + NH₃, what would be the ratio of cis to trans isomers in the product?

A d⁶ ion (Fe²⁺) is complexed with six strong-field ligands (for example, SCN^-) . What is the number of unpaired electrons in this complex?

Use the crystal field model to explain why solutions with Ag⁺ are colorless..

Which of the following crystal field diagrams is correct for Mn(CN) ₆^3- , where CN^- is a strong-field ligand?

How many unpaired electrons are found in Fe(en) ₃²⁺ (strong field) ?