Question 1

The oxidation and coordination numbers of cobalt in the compound [Co(NH3)5Cl]Cl2 are, respectively

Accepted Answer

A) 2 and 6. 
B) 2 and 8. 
C) 3 and 6. 
D) 3 and 8. 
E) None of these choices are correct. 
A) 2 and 6. 
B) 2 and 8. 
C) 3 and 6. 
D) 3 and 8. 
E) None of these choices are correct. C

Question 2

Which of the following species could exist as isomers?

Accepted Answer

A) [Co(H 2O)4Cl 2] + 
B) [Pt(NH 3)Br 3] − 
C) [Pt(en)Cl 2] 
D) [Pt(NH 3)3Cl] + 
E) None of these choices are correct. 
A) [Co(H 2O)4Cl 2] + 
B) [Pt(NH 3)Br 3] − 
C) [Pt(en)Cl 2] 
D) [Pt(NH 3)3Cl] + 
E) None of these choices are correct. A

Question 3

Which of the following will be the strongest oxidizing agent?

Accepted Answer

A) Cr 
B) Cr(II) 
C) Cr(III) 
D) Cr(IV) 
E) Cr(VI) 
A) Cr 
B) Cr(II) 
C) Cr(III) 
D) Cr(IV) 
E) Cr(VI) E

Question 4

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 5

Consider the following octahedral complex structures, each involving ethylene diamine and two different, unidentate ligands X and Y.   Which one of the following statements about these structures is incorrect?

Accepted Answer

A) Structures 1 and 2 are optical isomers. 
B) Structures 1 and 3 are optical isomers. 
C) Structures 1 and 3 are different complexes. 
D) Structures 1 and 4 are geometrical isomers. 
E) Structures 3 and 4 are the same complex. 
A) Structures 1 and 2 are optical isomers. 
B) Structures 1 and 3 are optical isomers. 
C) Structures 1 and 3 are different complexes. 
D) Structures 1 and 4 are geometrical isomers. 
E) Structures 3 and 4 are the same complex.

Question 6

The conversion of the chromate ion (CrO42−) to the dichromate ion (Cr2O72−) is a redox process.

Accepted Answer

A) True 
 B)False

Question 7

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

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

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 10

The permanganate ion (MnO4−) is a powerful reducing agent.

Accepted Answer

A) True 
 B)False

Question 11

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. 
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.

Question 12

How many unpaired electrons will there be in a high-spin octahedral complex of Fe(II)?

Accepted Answer

A) 0 
B) 2 
C) 4 
D) 6 
E) None of these choices are correct. 
A) 0 
B) 2 
C) 4 
D) 6 
E) None of these choices are correct.

Question 13

All the actinide series of transition elements are radioactive.

Accepted Answer

A) True 
 B)False

Question 14

Which one of the following has the ground state electron configuration [Ar]3d104s1?

Accepted Answer

A) In + 
B) Cd 2+ 
C) Ag + 
D) Ag 
E) Cu 
A) In + 
B) Cd 2+ 
C) Ag + 
D) Ag 
E) Cu

Question 15

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

Accepted Answer

A) CN − 
B) EDTA 4− 
C) SCN − 
D) Ethylene diamine 
E) Ethylene, C 2H 4 
A) CN − 
B) EDTA 4− 
C) SCN − 
D) Ethylene diamine 
E) Ethylene, C 2H 4

Question 16

Give the systematic name for [Cu(NH3)4]Cl2.

Accepted Answer

A) Dichlorotetraamminecuprate(II) 
B) Tetraamminecopper(II)chloride 
C) Copper(II)ammonium chloride 
D) Tetraaminocopper(II)chloride 
E) None of these choices are correct. 
A) Dichlorotetraamminecuprate(II) 
B) Tetraamminecopper(II)chloride 
C) Copper(II)ammonium chloride 
D) Tetraaminocopper(II)chloride 
E) None of these choices are correct.

Question 17

Write the formula for diamminedichloroethylenediaminecobalt(III) bromide.

Accepted Answer

A) [CoCl 2(en)(NH 3)2]Br 
B) [CoCl 2(en)(NH 3)2]Br 2 
C) [CoCl 2(en)2(NH 3)2]Br 
D) [CoCl 2(en)2(NH 3)2]Br 2 
E) None of these choices are correct. 
A) [CoCl 2(en)(NH 3)2]Br 
B) [CoCl 2(en)(NH 3)2]Br 2 
C) [CoCl 2(en)2(NH 3)2]Br 
D) [CoCl 2(en)2(NH 3)2]Br 2 
E) None of these choices are correct.

Question 18

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 19

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 20

A certain transition element has the stable oxidation states of +2, +3, +4, +5, and +6. In which state will the element be most likely to form a covalent bond with chlorine?

Accepted Answer

A) +2 
B) +3 
C) +4 
D) +5 
E) +6 
A) +2 
B) +3 
C) +4 
D) +5 
E) +6

Exam 23: Transition Elements and Their Coordination Compounds

The oxidation and coordination numbers of cobalt in the compound [Co(NH3)5Cl]Cl2 are, respectively

Which of the following species could exist as isomers?

Which of the following will be the strongest oxidizing agent?

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

Consider the following octahedral complex structures, each involving ethylene diamine and two different, unidentate ligands X and Y. Which one of the following statements about these structures is incorrect?

The conversion of the chromate ion (CrO42−) to the dichromate ion (Cr2O72−) is a redox process.

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

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

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

The permanganate ion (MnO4−) is a powerful reducing agent.

The crystal field splitting energy, Δ,

How many unpaired electrons will there be in a high-spin octahedral complex of Fe(II)?

All the actinide series of transition elements are radioactive.

Which one of the following has the ground state electron configuration [Ar]3d104s1?

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

Give the systematic name for [Cu(NH3)4]Cl2.

Write the formula for diamminedichloroethylenediaminecobalt(III) bromide.

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

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

A certain transition element has the stable oxidation states of +2, +3, +4, +5, and +6. In which state will the element be most likely to form a covalent bond with chlorine?

Keys to the Study of 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 oxidation and coordination numbers of cobalt in the compound [Co(NH₃)₅Cl]Cl₂ are, respectively

The conversion of the chromate ion (CrO₄²⁻) to the dichromate ion (Cr₂O₇²⁻) is a redox process.

The permanganate ion (MnO₄⁻) is a powerful reducing agent.

Which one of the following has the ground state electron configuration [Ar]3d¹⁰4s¹?

Give the systematic name for [Cu(NH₃)₄]Cl₂.

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