Question 1

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

Accepted Answer

A)  H2O
B)   CN-
C)   NH3
D)   OH-
E)   Cl-F) None of the above
G) C) and D)

Question 2

Which of the following species could exist as isomers?

Accepted Answer

A)  [Co(H2O) 4Cl2]+
B)  [Pt(NH3) Br3]-
C)  [Pt(en) Cl2]
D)  [Pt(NH3) 3Cl]+
E)  None of these choices are correct.F) None of the above
G) A) and C)

Question 3

Which of the following ions is least likely to form colored compounds?

Accepted Answer

A)   Mn2+
B)   Cr5+
C)   Sc3+
D)   Fe3+
E)   Co2+F) B) and C)
G) B) and E)

Question 4

Write the formula for sodium tetracyanonickelate(II) .

Accepted Answer

A)   Na[Ni(CN) 4]
B)   Na[Ni(CN) 4]2
C)   Na2[Ni(CN) 4]
D)   Na4[Ni(CN) 4]
E)   None of these choices are correct.F) A) and B)
G) D) and E)

Question 5

A feature of transition metal chemistry is that these elements exhibit multiple oxidation states. Which one of the following elements exhibits the smallest number of different oxidation states?

Accepted Answer

A)   Ti
B)   Cr
C)   Mn
D)   Co
E)   ZnF) A) and E)
G) A) and D)

Question 6

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) B) and D)
G) A) and D)

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) C) and E)
G) None of the above

Question 8

Octahedral complexes can exhibit geometric, optical, and linkage isomerism.

Accepted Answer

A) True 
 B)False

Question 9

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)   NO2-
D)   CO
E)   I?F) A) and C)
G) B) and D)

Question 10

Aluminum reacts with oxygen in the air to form a protective oxide coating. Silver also reactswith compounds in air to form a black coating. What substance is formed?

Accepted Answer

A)   silver oxide
B)  silver chloride
C)  silver sulfide
D)  silver carbonate
E)  silver nitrideF) A) and E)
G) None of the above

Question 11

What is the highest possible oxidation state for molybdenum, Mo?

Accepted Answer

A)   +2
B)   +4
C)   +6
D)   +8
E)   None of these choices are correct.F) A) and E)
G) C) and E)

Question 12

Which of the following ligands could participate in linkage isomerism?

Accepted Answer

A)   NH3
B)  H2O
C)  NH4+
D)  NO2-
E)   ethylenediamineF) B) and E)
G) A) and E)

Question 13

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) A) and C)
G) A) and B)

Question 14

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

Accepted Answer

A) True 
 B)False

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 C)
G) A) and B)

Question 16

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) B) and D)
G) C) and D)

Question 17

In the formation of a transition metal complex, the central metal atom or ion acts as

Accepted Answer

A)   an Arrhenius acid.
B)  a Bronsted-Lowry acid.
C)  a Bronsted-Lowry base.
D)  a Lewis acid.
E)  a Lewis base.F) A) and B)
G) A) and C)

Question 18

Which of the oxidation states of chromium has the largest valence-state electronegativity?

Accepted Answer

A)   chromium(0) 
B)  chromium(II) 
C)  chromium(III) 
D)  chromium(IV) 
E)  chromium(VI) F) C) and E)
G) A) and B)

Question 19

The ground state electronic configuration of Zn2+ is

Accepted Answer

A)  [Ar]4s23d8.
B)  [Ar]4s23d10.
C)  [Ar]4s13d9.
D)  [Ar]3d10.
E)  [Ar]3d8.F) A) and E)
G) B) and D)

Question 20

In the presence of a strong octahedral ligand field, the number of unpaired electrons in Co(III)  will be

Accepted Answer

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

Exam 23: Transition Elements and Their Coordination Compounds

The ground state electronic configuration of Zn2+ is

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A characteristic of ligands is that

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Which of the oxidation states of chromium has the largest valence-state electronegativity?

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Write the formula for sodium tetracyanonickelate(II) .

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Which of the following ions is least likely to form colored compounds?

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In the formation of a transition metal complex, the central metal atom or ion acts as

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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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In the presence of a strong octahedral ligand field, the number of unpaired electrons in Co(III) will be

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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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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?

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A feature of transition metal chemistry is that these elements exhibit multiple oxidation states. Which one of the following elements exhibits the smallest number of different oxidation states?

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Which of the following ligands could participate in linkage isomerism?

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What is the highest possible oxidation state for molybdenum, Mo?

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Which of the following coordination numbers applies to octahedral complexes?

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Which of the following species could exist as isomers?

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

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Octahedral complexes can exhibit geometric, optical, and linkage isomerism.

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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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Aluminum reacts with oxygen in the air to form a protective oxide coating. Silver also reactswith compounds in air to form a black coating. What substance is formed?

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The ground state electronic configuration of Zn²⁺ is

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

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