Question 1

All of the following complexes are low-spin except

Accepted Answer

A) Co(CN)63-. 
B) Co(NH3)63+. 
C) Rh(NH3)63+. 
D) Co(en)33+. 
E) CoCl42-. 
A) Co(CN)63-. 
B) Co(NH3)63+. 
C) Rh(NH3)63+. 
D) Co(en)33+. 
E) CoCl42-. E

Question 2

In the d-block elements,the third-row metallic radii are about the same as the second-row radii because of

Accepted Answer

A) the lanthanide contraction. 
B) the third-row metallic radii are greater than the second-row radii. 
C) the increased number of d-electrons. 
D) greater shielding of f-electrons. 
E) greater shielding of d-electrons. 
A) the lanthanide contraction. 
B) the third-row metallic radii are greater than the second-row radii. 
C) the increased number of d-electrons. 
D) greater shielding of f-electrons. 
E) greater shielding of d-electrons. A

Question 3

All of the following ligands are monodentate except

Accepted Answer

A) ammine. 
B) cyano. 
C) aqua. 
D) carbonyl. 
E) oxalato. 
A) ammine. 
B) cyano. 
C) aqua. 
D) carbonyl. 
E) oxalato. E

Question 4

Which of the following complexes is chiral?

Accepted Answer

A) trans-[Cr(en)2Cl2]+  
B) cis-[Cr(en)2Cl2]+  
C) cis-[Cr(NH3)4Cl2]+  
D) trans-[Cr(en)2(NH3)Cl]2+  
E) [Co(OH2)3(NH3)3]3+  
A) trans-[Cr(en)2Cl2]+  
B) cis-[Cr(en)2Cl2]+  
C) cis-[Cr(NH3)4Cl2]+  
D) trans-[Cr(en)2(NH3)Cl]2+  
E) [Co(OH2)3(NH3)3]3+

Question 5

How many unpaired electrons are expected for Co(OH2)62+?

Accepted Answer

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

Question 6

Why is $\Delta$T always less than $\Delta$O?

Accepted Answer

A) There are two more ligands surrounding the metal. 
B) There are two fewer ligands surrounding the metal. 
C) The d-orbitals do not point directly at the ligands. 
D) None of the above. 
E) Both B and C. 
A) There are two more ligands surrounding the metal. 
B) There are two fewer ligands surrounding the metal. 
C) The d-orbitals do not point directly at the ligands. 
D) None of the above. 
E) Both B and C.

Question 7

The complex ion [Cr(OH2)6]2+ has four unpaired electrons.This means that

Accepted Answer

A) the complex is high-spin. 
B) the complex is diamagnetic. 
C) the water ligands are difficult to remove. 
D) the complex is low-spin. 
E) $\Delta$o is very large. 
A) the complex is high-spin. 
B) the complex is diamagnetic. 
C) the water ligands are difficult to remove. 
D) the complex is low-spin. 
E) $\Delta$o is very large.

Question 8

How many unpaired electrons can be predicted for an iron(II)complex when the complex is tetrahedral?

Accepted Answer

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

Question 9

Which of the following are ionization isomers?

Accepted Answer

A) cis-[CoCl2(en)2]Cl and trans-[CoCl2(en)2]Cl 
B) [Cr(NH3)6][Fe(CN)6] and [Fe(NH3)6][Cr(CN)6] 
C) [CrCl(OH2)5]Cl2-H2O and [CrCl2(OH2)4]Cl-2H2O 
D) [CoBr(NH3)5]SO4 and [CoSO4(NH3)5]Br 
E) [CoNCS(NH3)5]Cl2 and [CoSCN(NH3)5]Cl2  
A) cis-[CoCl2(en)2]Cl and trans-[CoCl2(en)2]Cl 
B) [Cr(NH3)6][Fe(CN)6] and [Fe(NH3)6][Cr(CN)6] 
C) [CrCl(OH2)5]Cl2-H2O and [CrCl2(OH2)4]Cl-2H2O 
D) [CoBr(NH3)5]SO4 and [CoSO4(NH3)5]Br 
E) [CoNCS(NH3)5]Cl2 and [CoSCN(NH3)5]Cl2

Question 10

For which one of the following would it not be possible to distinguish between high-spin and low-spin complexes in octahedral geometry?

Accepted Answer

A) Cr(II) 
B) Co(III) 
C) Co(II) 
D) Fe(II) 
E) Ni(II) 
A) Cr(II) 
B) Co(III) 
C) Co(II) 
D) Fe(II) 
E) Ni(II)

Question 11

A ligand is

Accepted Answer

A) a Lewis base. 
B) necessary in a complex to balance the charge on the metal ion. 
C) used to force octahedral geometry on a metal ion. 
D) a Lewis acid. 
E) used to precipitate metal ions from aqueous solution. 
A) a Lewis base. 
B) necessary in a complex to balance the charge on the metal ion. 
C) used to force octahedral geometry on a metal ion. 
D) a Lewis acid. 
E) used to precipitate metal ions from aqueous solution.

Question 12

How many unpaired electrons are predicted for a tetrahedral iron (II)complex?

Accepted Answer

A) 5 or 1,depending on the ligands. 
B) 0 or 4,depending on the ligands. 
C) 1 
D) 4 
E) 5 
A) 5 or 1,depending on the ligands. 
B) 0 or 4,depending on the ligands. 
C) 1 
D) 4 
E) 5

Question 13

Which complex,[CoBr4]2- or [Co(NH3)5]3+,is the more highly colored?

Accepted Answer

[CoBr<sub>

Question 14

Except for scandium and titanium,all the 3d transition metals form divalent ions in aqueous solution.

Accepted Answer

A) True 
 B)False

Question 15

Most d-block elements have only one common oxidation state.

Accepted Answer

A) True 
 B)False

Question 16

What is the oxidation number of iron in K3[Fe(CN)6]?

Accepted Answer

A) +3 
B) +2 
C) +9 
D) +6 
A) +3 
B) +2 
C) +9 
D) +6

Question 17

Consider the complexes fac- and mer-triaquatrichlororuthenium(III)chloride.Neither of these complexes is chiral.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following would be the strongest acid in aqueous solution?

Accepted Answer

A) Mg(OH2)62+(aq) 
B) V(OH2)62+(aq) 
C) Ni(OH2)62+(aq) 
D) Sc(OH2)63+(aq) 
E) Fe(OH2)62+(aq) 
A) Mg(OH2)62+(aq) 
B) V(OH2)62+(aq) 
C) Ni(OH2)62+(aq) 
D) Sc(OH2)63+(aq) 
E) Fe(OH2)62+(aq)

Question 19

A $\pi$-bonding ligand always gives a larger ligand field splitting energy than a  $\sigma$-bonding ligand.

Accepted Answer

A) True 
 B)False

Question 20

Match each complex with the number of unpaired electrons.

Accepted Answer

The answer of Match each complex with the number of...

All of the following complexes are low-spin except

In the d-block elements,the third-row metallic radii are about the same as the second-row radii because of

All of the following ligands are monodentate except

Which of the following complexes is chiral?

How many unpaired electrons are expected for Co(OH₂)₆²⁺?

Why is $\Delta$ _T always less than $\Delta$ _O?

The complex ion [Cr(OH₂)₆]²⁺ has four unpaired electrons.This means that

How many unpaired electrons can be predicted for an iron(II)complex when the complex is tetrahedral?

Which of the following are ionization isomers?

For which one of the following would it not be possible to distinguish between high-spin and low-spin complexes in octahedral geometry?

A ligand is

How many unpaired electrons are predicted for a tetrahedral iron (II)complex?

Which complex,[CoBr₄]^2- or [Co(NH₃)₅]³⁺,is the more highly colored?

Except for scandium and titanium,all the 3d transition metals form divalent ions in aqueous solution.

Most d-block elements have only one common oxidation state.

What is the oxidation number of iron in K₃[Fe(CN)₆]?

Consider the complexes fac- and mer-triaquatrichlororuthenium(III)chloride.Neither of these complexes is chiral.

Which of the following would be the strongest acid in aqueous solution?

A $\pi$ -bonding ligand always gives a larger ligand field splitting energy than a $\sigma$ -bonding ligand.

Match each complex with the number of unpaired electrons.

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Liquids and Solids

Inorganic Materials

Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the Main Group Elements

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

Filters

Exam 17: The Elements: The D Block

All of the following complexes are low-spin except

In the d-block elements,the third-row metallic radii are about the same as the second-row radii because of

All of the following ligands are monodentate except

Which of the following complexes is chiral?

How many unpaired electrons are expected for Co(OH2)62+?

Why is Δ\DeltaΔ T always less than Δ\DeltaΔ O?

The complex ion [Cr(OH2)6]2+ has four unpaired electrons.This means that

How many unpaired electrons can be predicted for an iron(II)complex when the complex is tetrahedral?

Which of the following are ionization isomers?

For which one of the following would it not be possible to distinguish between high-spin and low-spin complexes in octahedral geometry?

A ligand is

How many unpaired electrons are predicted for a tetrahedral iron (II)complex?

Which complex,[CoBr4]2- or [Co(NH3)5]3+,is the more highly colored?

Except for scandium and titanium,all the 3d transition metals form divalent ions in aqueous solution.

Most d-block elements have only one common oxidation state.

What is the oxidation number of iron in K3[Fe(CN)6]?

Consider the complexes fac- and mer-triaquatrichlororuthenium(III)chloride.Neither of these complexes is chiral.

Which of the following would be the strongest acid in aqueous solution?

A π\piπ -bonding ligand always gives a larger ligand field splitting energy than a σ\sigmaσ -bonding ligand.

Match each complex with the number of unpaired electrons.

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Liquids and Solids

Inorganic Materials

Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the Main Group Elements

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

Filters

How many unpaired electrons are expected for Co(OH₂)₆²⁺?

Why is $\Delta$ _T always less than $\Delta$ _O?

The complex ion [Cr(OH₂)₆]²⁺ has four unpaired electrons.This means that

Which complex,[CoBr₄]^2- or [Co(NH₃)₅]³⁺,is the more highly colored?

What is the oxidation number of iron in K₃[Fe(CN)₆]?

A $\pi$ -bonding ligand always gives a larger ligand field splitting energy than a $\sigma$ -bonding ligand.