Question 1

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

Accepted Answer

A)  Red
B)  Violet
C)  Orange
D)  Yellow
E)  BlueF) A) and B)
G) B) and D)

Question 2

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.F) A) and B)
G) None of the above C

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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.F) D) and E)
G) B) and C) A

Question 5

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.F) D) and E)
G) B) and E)

Question 6

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 4F) B) and D)
G) None of the above

Question 7

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) F) A) and D)
G) A) and C) E

Question 8

All the actinide series of transition elements are radioactive.

Accepted Answer

A) True 
 B)False

Question 9

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.F) B) and E)
G) A) and D)

Question 10

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)  +6F) D) and E)
G) B) and E)

Question 11

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.F) B) and D)
G) D) and E)

Question 12

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.F) C) and D)
G) All of the above

Question 13

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.F) C) and E)
G) A) and B)

Question 14

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.F) A) and D)
G) B) and D)

Question 15

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.F) A) and B)
G) A) and E)

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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)  CuF) None of the above
G) A) and E)

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

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.F) B) and D)
G) B) and E)

Exam 23: Transition Elements and Their Coordination Compounds

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

Which of the following species could exist as isomers?

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following will be the strongest oxidizing agent?

Correct AnswerverifiedE

All the actinide series of transition elements are radioactive.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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?

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

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

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

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The crystal field splitting energy, Δ,

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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Write the formula for diamminedichloroethylenediaminecobalt(III) bromide.

Correct AnswerverifiedShow Answer

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

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C

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A

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E

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

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

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

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

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

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