Question 1

Which one of the following normally acts as a bidentate ligand in complexes with transitionmetal ions?

Accepted Answer

A)  CN- 
B)  EDTA4- 
C)  SCN- 
D)  ethylene diamine 
E)  ethylene, C2H4 
A)  CN- 
B)  EDTA4- 
C)  SCN- 
D)  ethylene diamine 
E)  ethylene, C2H4

Question 2

The Cu2+ ion has 1 unpaired electron.

Accepted Answer

A) True 
 B)False

Question 3

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)  None of these choices are correct. 
A)  1 
B)  3 
C)  5 
D)  7 
E)  None of these choices are correct.

Question 4

10.0 mL of a 0.100 mol/L solution of a metal ion M2+ is mixed with 10.0 mL of a 0.100 mol/L solution of a ligand L. A reaction occurs in which the product is ML3. Approximately, what is the maximum concentration of ML32+, in mol/L, which could result from this reaction?

Accepted Answer

A)  0.100 
B)  0.050 
C)  0.033 
D)  0.025 
E)  0.017 
A)  0.100 
B)  0.050 
C)  0.033 
D)  0.025 
E)  0.017

Question 5

Which of the following will be diamagnetic?

Accepted Answer

A)  Ni2+ 
B)  Cr2+ 
C)  Mn2+ 
D)  Co3+ 
E)  Ti4+ 
A)  Ni2+ 
B)  Cr2+ 
C)  Mn2+ 
D)  Co3+ 
E)  Ti4+

Question 6

All the actinide series of transition elements are radioactive.

Accepted Answer

A) True 
 B)False

Question 7

Tetrahedral complexes can exhibit both optical and linkage isomerism.

Accepted Answer

A) True 
 B)False

Question 8

Of the 3d transition series of elements, scandium has the greatest atomic radius.

Accepted Answer

A) True 
 B)False

Question 9

Valence Bond theory rationalizes octahedral geometry by assuming a d2sp3 hybridization pattern.

Accepted Answer

A) True 
 B)False

Question 10

Of the 3d transition series of elements, zinc has the greatest atomic radius.

Accepted Answer

A) True 
 B)False

Question 11

If a solution absorbs green light, what is its likely color?

Accepted Answer

A)  red 
B)  violet 
C)  orange 
D)  yellow 
E)  blue 
A)  red 
B)  violet 
C)  orange 
D)  yellow 
E)  blue

Question 12

The inner transition series of elements arise from the filling of f orbitals.

Accepted Answer

A) True 
 B)False

Question 13

In the compound [Ni(en)2(H2O)2]SO4 (where en = ethylenediamine) the oxidation number and coordination number of nickel are, respectively

Accepted Answer

A)  2 and 6. 
B)  4 and 6. 
C)  6 and 6. 
D)  2 and 4. 
E)  4 and 4. 
A)  2 and 6. 
B)  4 and 6. 
C)  6 and 6. 
D)  2 and 4. 
E)  4 and 4.

Question 14

The ground state electronic configuration of Cr2+ is

Accepted Answer

A) [Ar]4s13d5. 
B) [Ar]4s23d4. 
C) [Ar]3d4. 
D) [Ar]4s13d3. 
E) [Ar]4s23d2. 
A) [Ar]4s13d5. 
B) [Ar]4s23d4. 
C) [Ar]3d4. 
D) [Ar]4s13d3. 
E) [Ar]4s23d2.

Question 15

Chromium and manganese are among the transition elements that form several different oxides. Which of the following statements characterize these oxides?

Accepted Answer

A) As the oxidation number on the metal increases, the valence-state electronegativity increases and the oxides change from acidic to basic. 
B) As the oxidation number on the metal increases, the valence-state electronegativity increases and the oxides change from basic to acidic. 
C) As the oxidation number on the metal increases, the valence-state electronegativity decreases and the oxides change from acidic to basic. 
D) As the oxidation number on the metal increases, the valence-state electronegativity decreases and the oxides change from basic to acidic. 
E)  None of these choices are correct. 
A) As the oxidation number on the metal increases, the valence-state electronegativity increases and the oxides change from acidic to basic. 
B) As the oxidation number on the metal increases, the valence-state electronegativity increases and the oxides change from basic to acidic. 
C) As the oxidation number on the metal increases, the valence-state electronegativity decreases and the oxides change from acidic to basic. 
D) As the oxidation number on the metal increases, the valence-state electronegativity decreases and the oxides change from basic to acidic. 
E)  None of these choices are correct.

Question 16

Which of the following should be the strongest reducing agent?

Accepted Answer

A)  Fe 
B)  Ru 
C)  Os 
D)  Re 
E)  Cu 
A)  Fe 
B)  Ru 
C)  Os 
D)  Re 
E)  Cu

Question 17

Which of the following statements about lanthanides and actinides is incorrect?

Accepted Answer

A)  The +3 oxidation state is the most common for both lanthanides and actinides. 
B)  All of the actinide elements are radioactive. 
C)  All of the lanthanide elements occur in nature. 
D)  All of the actinide elements are artificially made. 
E)  Due to similarities in their chemical properties, the actinide elements are not easily separated from each other. 
A)  The +3 oxidation state is the most common for both lanthanides and actinides. 
B)  All of the actinide elements are radioactive. 
C)  All of the lanthanide elements occur in nature. 
D)  All of the actinide elements are artificially made. 
E)  Due to similarities in their chemical properties, the actinide elements are not easily separated from each other.

Question 18

Write the formula for pentaamminechlorocobalt(III) chloride.

Accepted Answer

A)  [Co(NH3)5Cl]Cl 
B) [Co(NH3)5Cl]Cl2 
C) [Co(NH3)5Cl]Cl3 
D) [Co(NH3)5Cl]Cl4 
E)  None of these choices are correct. 
A)  [Co(NH3)5Cl]Cl 
B) [Co(NH3)5Cl]Cl2 
C) [Co(NH3)5Cl]Cl3 
D) [Co(NH3)5Cl]Cl4 
E)  None of these choices are correct.

Question 19

In the compound K[Co(C2O4)2(H2O)2] (where C2O42- = oxalate) the oxidation number and coordination number of cobalt are, respectively

Accepted Answer

A)  -1 and 4. 
B)  -1 and 6. 
C)  3 and 4. 
D)  3 and 6. 
E)  1 and 6. 
A)  -1 and 4. 
B)  -1 and 6. 
C)  3 and 4. 
D)  3 and 6. 
E)  1 and 6.

Question 20

In complexes of transition metals, the maximum coordination number of the metal is equal to its number of d electrons.

Accepted Answer

A) True 
 B)False

Exam 23: Transition Elements and Their Coordination Compounds

Which one of the following normally acts as a bidentate ligand in complexes with transitionmetal ions?

The Cu2+ ion has 1 unpaired electron.

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

10.0 mL of a 0.100 mol/L solution of a metal ion M2+ is mixed with 10.0 mL of a 0.100 mol/L solution of a ligand L. A reaction occurs in which the product is ML3. Approximately, what is the maximum concentration of ML32+, in mol/L, which could result from this reaction?

Which of the following will be diamagnetic?

All the actinide series of transition elements are radioactive.

Tetrahedral complexes can exhibit both optical and linkage isomerism.

Of the 3d transition series of elements, scandium has the greatest atomic radius.

Valence Bond theory rationalizes octahedral geometry by assuming a d2sp3 hybridization pattern.

Of the 3d transition series of elements, zinc has the greatest atomic radius.

If a solution absorbs green light, what is its likely color?

The inner transition series of elements arise from the filling of f orbitals.

In the compound [Ni(en)2(H2O)2]SO4 (where en = ethylenediamine) the oxidation number and coordination number of nickel are, respectively

The ground state electronic configuration of Cr2+ is

Chromium and manganese are among the transition elements that form several different oxides. Which of the following statements characterize these oxides?

Which of the following should be the strongest reducing agent?

Which of the following statements about lanthanides and actinides is incorrect?

Write the formula for pentaamminechlorocobalt(III) chloride.

In the compound K[Co(C2O4)2(H2O)2] (where C2O42- = oxalate) the oxidation number and coordination number of cobalt are, respectively

In complexes of transition metals, the maximum coordination number of the metal is equal to its number of d electrons.

Keys to Studying Chemistry Definitions, Units, and Problem Solving

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces Liquids, Solids, and Phase Changes

The Properties of Mixtures Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics Rates and Mechanisms of Chemical Reactions

Equilibrium the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics Entropy, Free Energy, and Reaction Direction

Electrochemistry Chemical Change and Electrical Work

The Elements in Nature and Industry

Nuclear Reactions and Their Applications

Filters

The Cu²⁺ ion has 1 unpaired electron.

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

10.0 mL of a 0.100 mol/L solution of a metal ion M²⁺ is mixed with 10.0 mL of a 0.100 mol/L solution of a ligand L. A reaction occurs in which the product is ML₃. Approximately, what is the maximum concentration of ML₃²⁺, in mol/L, which could result from this reaction?

Valence Bond theory rationalizes octahedral geometry by assuming a d²sp³ hybridization pattern.

In the compound [Ni(en)₂(H₂O)₂]SO₄ (where en = ethylenediamine) the oxidation number and coordination number of nickel are, respectively

The ground state electronic configuration of Cr²⁺ is

In the compound K[Co(C₂O₄)₂(H₂O)₂] (where C₂O₄^2- = oxalate) the oxidation number and coordination number of cobalt are, respectively