Question 1

In the spectrochemical series, which one of the following ligands has the strongest field?

Accepted Answer

A)  H 2O
B)  CN −
C)  NH 3
D)  OH −
E)  Cl −F) A) and D)
G) A) and B)

Question 2

The ground state electron configuration of a transition element atom cannot have more than one incomplete subshell.

Accepted Answer

A) True 
 B)False

Question 3

Consider the following octahedral complex structures, each involving ethylene diamine and two different, unidentate ligands X and Y.  Which one, if any, of the following is a pair of optical isomers?

Accepted Answer

A)  1 and 2
B)  1 and 3
C)  1 and 4
D)  3 and 4
E)  None of these choices are correct.F) B) and E)
G) A) and E)

Question 4

Which of the following transition elements can achieve the largest oxidation number?

Accepted Answer

A)  Chromium, Cr, Group 6B(6) 
B)  Manganese, Mn, Group 7B(7) 
C)  Iron, Fe, Group 8B(8) 
D)  Cobalt, Co, Group 8B(9) 
E)  Zinc, Zn, Group 2B(12) F) C) and D)
G) A) and E)

Question 5

The most common oxidation state for ions of the transition elements is

Accepted Answer

A)  +2.
B)  +3.
C)  +4.
D)  +5.
E)  +6.F) A) and B)
G) A) and C)

Question 6

Which of the following ligands is most likely to form a low-spin octahedral complex with iron(III) ?

Accepted Answer

A)  Cl −
B)  H 2O
C)  NH 3
D)  OH −
E)  COF) C) and D)
G) C) and E)

Question 7

A characteristic of ligands is that

Accepted Answer

A)  they are Lewis acids.
B)  they are Lewis bases.
C)  they are ions.
D)  they are electron pair acceptors.
E)  they are Brønsted-Lowry acids.F) D) and E)
G) A) and C)

Question 8

Which of the following ligands could participate in linkage isomerism?

Accepted Answer

A)  NH 3
B)  H 2O
C)  NH 4 +
D)  NO 2 −
E)  EthylenediamineF) B) and D)
G) A) and D)

Question 9

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)  0.017F) B) and E)
G) A) and B)

Question 10

In a coordination compound involving a complex ion of square planar geometry, which of the following types of isomerism is/are never possible?

Accepted Answer

A)  Geometric
B)  Optical
C)  Linkage
D)  Coordination
E)  More than one of theseF) D) and E)
G) A) and B)

Question 11

A certain transition metal complex has the formula MX42+. If the metal ion has a d8 electron configuration, what is the shape of the complex?

Accepted Answer

A)  Octahedral
B)  Square pyramid
C)  Tetrahedral
D)  Trigonal pyramid
E)  Square planarF) A) and B)
G) C) and E)

Question 12

What is the coordination number of cobalt in the complex ion [Co(en) Cl4]-? (en = ethylenediamine)

Accepted Answer

A)  1
B)  2
C)  4
D)  6
E)  8F) D) and E)
G) B) and C)

Question 13

The Cu2+ ion has 1 unpaired electron.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following transition elements can have an oxidation number of +7?

Accepted Answer

A)  V
B)  Cr
C)  Mn
D)  Fe
E)  CoF) B) and C)
G) A) and B)

Question 15

Which of the following ions could exist in either the high-spin or low-spin state in an octahedral complex?

Accepted Answer

A)  Sc 3+
B)  Ni 2+
C)  Mn 2+
D)  Ti 4+
E)  Zn 2+F) A) and B)
G) A) and C)

Question 16

Which of the following ligands is most likely to form a high spin octahedral complex with cobalt(II) ?

Accepted Answer

A)  CN −
B)  en (ethylenediamine) 
C)  NO 2 −
D)  CO
E)  I −F) A) and C)
G) A) and E)

Question 17

Which of the following complexes could have isomeric forms?

Accepted Answer

A)  [Pt(NH 3) 3Cl] +
B)  [Fe(CN) 6] 3 +
C)  [Pt(NH 3) Br 3] +
D)  [Pt(en) Cl 2]
E)  [Co(H 2O) 4Cl 2] +F) B) and D)
G) C) and D)

Question 18

Which of the following coordination numbers applies to octahedral complexes?

Accepted Answer

A)  4
B)  5
C)  6
D)  8
E)  None of these choices are correct.F) A) and D)
G) B) and C)

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

The maximum oxidation state of an element in the first transition series never exceeds its group number.

Accepted Answer

A) True 
 B)False

Exam 23: Transition Elements and Their Coordination Compounds

In a coordination compound involving a complex ion of square planar geometry, which of the following types of isomerism is/are never possible?

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In the spectrochemical series, which one of the following ligands has the strongest field?

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A characteristic of ligands is that

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Which of the following ligands could participate in linkage isomerism?

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

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The ground state electron configuration of a transition element atom cannot have more than one incomplete subshell.

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The maximum oxidation state of an element in the first transition series never exceeds its group number.

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The most common oxidation state for ions of the transition elements is

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Consider the following octahedral complex structures, each involving ethylene diamine and two different, unidentate ligands X and Y. Which one, if any, of the following is a pair of optical isomers?

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Which of the following complexes could have isomeric forms?

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Which of the following ligands is most likely to form a low-spin octahedral complex with iron(III) ?

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Which of the following transition elements can have an oxidation number of +7?

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What is the coordination number of cobalt in the complex ion [Co(en) Cl4]-? (en = ethylenediamine)

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Which of the following coordination numbers applies to octahedral complexes?

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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?

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Which of the following transition elements can achieve the largest oxidation number?

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A certain transition metal complex has the formula MX42+. If the metal ion has a d8 electron configuration, what is the shape of the complex?

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Which of the following ions could exist in either the high-spin or low-spin state in an octahedral complex?

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The Cu2+ ion has 1 unpaired electron.

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Which of the following ligands is most likely to form a high spin octahedral complex with cobalt(II) ?

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What is the coordination number of cobalt in the complex ion [Co(en) Cl₄]^-? (en = ethylenediamine)

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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?

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A certain transition metal complex has the formula MX₄²⁺. If the metal ion has a d⁸ electron configuration, what is the shape of the complex?

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The Cu²⁺ ion has 1 unpaired electron.

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