Question 1

The color of a transition metal complex results from:

Accepted Answer

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

Question 2

Co2+ in water is blue.

Accepted Answer

A) True 
 B)False  False

Question 3

How many unpaired electrons are found in each of the following complex ions?
-[Ni(CN)6]4-

Accepted Answer

2

Question 4

The coordination theory was proposed by:

Accepted Answer

A) Bailar 
B) Jorgensen 
C) Blomstrand 
D) Werner 
E) none of these 
A) Bailar 
B) Jorgensen 
C) Blomstrand 
D) Werner 
E) none of these

Question 5

Mn(H2O)43+ (tetrahedral)

Accepted Answer

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

Question 6

Fluoride ion ranks low in the spectrochemical series and produces a weak crystal field in complex ions.Based on this information,predict the number of unpaired electrons in CoF64-.

Accepted Answer

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

Question 7

The transition metal __________ assists insulin in the control of blood sugar and may also be involved in the control of cholesterol.

Accepted Answer

A) scandium 
B) titanium 
C) iron 
D) nickel 
E) chromium 
A) scandium 
B) titanium 
C) iron 
D) nickel 
E) chromium

Question 8

Name the careful heat treatment of metals that provides the proper combination of strength without too much brittleness.

Accepted Answer

A) tempering 
B) core hardening 
C) fire polishing 
D) blast furnace 
E) direct reduction 
A) tempering 
B) core hardening 
C) fire polishing 
D) blast furnace 
E) direct reduction

Question 9

Which of the following complexes would be diamagnetic (all electrons paired)? Assume the strong-field case for all complexes.

Accepted Answer

A) [Ni(CN)6]4- 
B) [Ti(CN)6]3- 
C) [Co(CN)6]3- 
D) [Cr(CN)6]3- 
E) none of these 
A) [Ni(CN)6]4- 
B) [Ti(CN)6]3- 
C) [Co(CN)6]3- 
D) [Cr(CN)6]3- 
E) none of these

Question 10

A complex ion is a charged species consisting of a metal ion surrounded by

Accepted Answer

A) other transition metals 
B) hydrogen ions 
C) ligands 
D) ligands and counter ions 
E) none of these 
A) other transition metals 
B) hydrogen ions 
C) ligands 
D) ligands and counter ions 
E) none of these

Question 11

Copper(I)complexes would be expected to be colorless.

Accepted Answer

A) True 
 B)False

Question 12

Why do transition metals show a lot of chemical similarities within a given period?

Accepted Answer

A) The valence s and p electrons affect their chemistry more so than the inner d and f electrons,which do not participate in bonding as easily. 
B) The number of electrons within a given period varies only slightly and is sometimes identical because these metals have more than one ionic form. 
C) All elements in a given period,including the representative elements,have a lot of chemical similarities due to the gradual increase in atomic number. 
D) The transition metals always fill their s and p orbitals first before filling their d orbitals,which affects their chemistry. 
E) None of the above is correct. 
A) The valence s and p electrons affect their chemistry more so than the inner d and f electrons,which do not participate in bonding as easily. 
B) The number of electrons within a given period varies only slightly and is sometimes identical because these metals have more than one ionic form. 
C) All elements in a given period,including the representative elements,have a lot of chemical similarities due to the gradual increase in atomic number. 
D) The transition metals always fill their s and p orbitals first before filling their d orbitals,which affects their chemistry. 
E) None of the above is correct.

Question 13

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

Accepted Answer

A) representation I 
B) representation II 
C) representation III 
D) representation IV 
E) representation V 
A) representation I 
B) representation II 
C) representation III 
D) representation IV 
E) representation V

Question 14

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

Question 15

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

Accepted Answer

A) I 
B) II 
C) III 
D) I,II 
E) none accounts for both phenomena 
A) I 
B) II 
C) III 
D) I,II 
E) none accounts for both phenomena

Question 16

True or false: Transition metals show great similarities both within a given period and within a given vertical group.

Accepted Answer

A) True 
 B)False

Question 17

How many unpaired electrons are found in each of the following complex ions?
-[Co(NH3) 4]2+

Accepted Answer

Question 18

Which of the following statements concerning the complex ion Co(en)2Cl2+ is true? (en = ethylenediamine,NH2CH2CH2NH2)?

Accepted Answer

A) The complex ion contains Co(I). 
B) The complex ion exhibits cis and trans geometrical isomers,but no optical isomers. 
C) The complex ion exhibits two geometrical isomers (cis and trans)and two optical isomers. 
D) Since en is a strong field ligand (large $\Delta$),the complex ion is paramagnetic. 
E) The geometric isomers of the complex ion have identical chemical properties. 
A) The complex ion contains Co(I). 
B) The complex ion exhibits cis and trans geometrical isomers,but no optical isomers. 
C) The complex ion exhibits two geometrical isomers (cis and trans)and two optical isomers. 
D) Since en is a strong field ligand (large $\Delta$),the complex ion is paramagnetic. 
E) The geometric isomers of the complex ion have identical chemical properties.

Question 19

When the body adapts to high altitudes,it makes more __________ to adapt to lower oxygen concentrations in the blood.

Accepted Answer

A) myoglobin 
B) iron 
C) protein 
D) hemoglobin 
E) fatty tissue 
A) myoglobin 
B) iron 
C) protein 
D) hemoglobin 
E) fatty tissue

Question 20

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.The metal ion could be:

Accepted Answer

A) V2+ 
B) Cu2+ 
C) Mn2+ 
D) Cr3+ 
E) Co2+ 
A) V2+ 
B) Cu2+ 
C) Mn2+ 
D) Cr3+ 
E) Co2+

Exam 21: Transition Metals and Coordination Chemistry

The color of a transition metal complex results from:

Co2+ in water is blue.

How many unpaired electrons are found in each of the following complex ions? -[Ni(CN)6]4-

The coordination theory was proposed by:

Mn(H2O)43+ (tetrahedral)

Fluoride ion ranks low in the spectrochemical series and produces a weak crystal field in complex ions.Based on this information,predict the number of unpaired electrons in CoF64-.

The transition metal __________ assists insulin in the control of blood sugar and may also be involved in the control of cholesterol.

Name the careful heat treatment of metals that provides the proper combination of strength without too much brittleness.

Which of the following complexes would be diamagnetic (all electrons paired)? Assume the strong-field case for all complexes.

A complex ion is a charged species consisting of a metal ion surrounded by

Copper(I)complexes would be expected to be colorless.

Why do transition metals show a lot of chemical similarities within a given period?

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

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

True or false: Transition metals show great similarities both within a given period and within a given vertical group.

How many unpaired electrons are found in each of the following complex ions? -[Co(NH3) 4]2+

Which of the following statements concerning the complex ion Co(en)2Cl2+ is true? (en = ethylenediamine,NH2CH2CH2NH2)?

When the body adapts to high altitudes,it makes more __________ to adapt to lower oxygen concentrations in the blood.

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.The metal ion could be:

Chemical Foundations

Atoms, molecules, and Ions

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Thermochemistry

Atomic Structure and Periodicity

Bonding: General Concepts

Covalent Bonding: Orbitals

Liquids and Solids

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex Ion Equilibria

Spontaneity, entropy, and Free Energy

Electrochemistry

The Nucleus: a Chemists View

The Representative Elements

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Filters

Co²⁺ in water is blue.

How many unpaired electrons are found in each of the following complex ions? -[Ni(CN)₆]⁴^-

Mn(H₂O)₄³⁺ (tetrahedral)

Fluoride ion ranks low in the spectrochemical series and produces a weak crystal field in complex ions.Based on this information,predict the number of unpaired electrons in CoF₆⁴^-.

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

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 each of the following complex ions? -[Co(NH₃)₄]²⁺

Which of the following statements concerning the complex ion Co(en)₂Cl₂⁺ is true? (en = ethylenediamine,NH₂CH₂CH₂NH₂)?