Question 1

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

Question 2

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

Question 3

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

Question 4

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

Question 5

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) All of the above
G) A) and D)

Question 6

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 E)
G) B) and D)

Question 7

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) B) and E)
G) A) and E)

Question 8

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

Question 9

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

Question 10

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) D) and E)
G) C) and E)

Question 11

Which of the following ligands could participate in linkage isomerism?

Accepted Answer

A)   NH3
B)  H2O
C)  NH4+
D)  NO2-
E)   ethylenediamineF) All of the above
G) D) and E)

Question 12

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) D) and E)
G) A) and D)

Question 13

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 E)
G) B) and D)

Question 14

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

Question 15

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) C) and D)
G) A) and D)

Question 16

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

Question 17

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

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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) A) and E)
G) A) and D)

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 23: Transition Elements and Their Coordination Compounds

Write the formula for sodium tetracyanonickelate(II) .

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Which of the following coordination numbers applies to octahedral complexes?

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

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

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Which of the following ligands could participate in linkage isomerism?

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

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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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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 characteristic of ligands is that

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

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The ground state electronic configuration of Zn2+ is

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

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

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

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The ground state electronic configuration of Zn²⁺ is

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