Question 1

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 is correct.F) A) and D)
G) D) and E)

Question 2

a.How many unpaired 3d electrons will there be in (i)high and (ii)low-spin complexes of Co(II)?
b.How can high and low-spin complexes be recognized and distinguished experimentally?

Accepted Answer

a.(i)high-spin,3 unpaired electrons
(ii)...

Question 3

In complexes of transition metals,the maximum coordination number of the metal is equal to its number of d electrons.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following atoms has the biggest radius?

Accepted Answer

A)  Ti
B)  Cr
C)  Fe
D)  Ni
E)  ZnF) A) and C)
G) A) and B)

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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

Question 7

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 is correct.F) B) and E)
G) None of the above

Question 8

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 B)
G) B) and C)

Question 9

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

Accepted Answer

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

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

Question 11

According to valence bond theory,what would be the set of hybrid orbitals used when a Period 4 transition metal forms a square planar complex?

Accepted Answer

A)  d2sp
B)  d2p2
C)  dsp3
D)  sp3
E)  dsp2F) B) and C)
G) B) and D)

Question 12

Write the formula for diamminedichloroethylenediaminecobalt(III) bromide.

Accepted Answer

A)  [CoCl2(en) (NH3) 2]Br
B)  [CoCl2(en) (NH3) 2]Br2
C)  [CoCl2(en) 2(NH3) 2]Br
D)  [CoCl2(en) 2(NH3) 2]Br2
E)  None of these choices is correct.F) B) and C)
G) C) and D)

Question 13

Give the systematic name for [CoCl3(H2O) ]-.

Accepted Answer

A)  cobalt(II) chloride monohydrate
B)  aquatrichlorocobalt(II) 
C)  aquatrichlorocobaltate(II) 
D)  aquatrichlorocobaltite(I) 
E)  None of these choices is correct.F) B) and C)
G) C) and E)

Question 14

In the compound K[Co(C2O4) 2(H2O) 2] (where C2O42- = oxalate) the oxidation number and coordination number of cobalt are,respectively:

Accepted Answer

A)  -1 and 4
B)  -1 and 6
C)  3 and 4
D)  3 and 6
E)  1 and 6F) D) and E)
G) B) and D)

Question 15

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 B)
G) C) and D)

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

Why is the +2 oxidation state so common among transition elements?

Accepted Answer

The outermost (ns²)el...

Question 18

What is the difference between a coordination compound and a complex ion?

Accepted Answer

A coordination compound genera...

Question 19

Write the formula for pentaamminechlorocobalt(III) chloride.

Accepted Answer

A)  [Co(NH3) 5Cl]Cl
B)  [Co(NH3) 5Cl]Cl2
C)  [Co(NH3) 5Cl]Cl3
D)  [Co(NH3) 5Cl]Cl4
E)  None of these choices is correct.F) D) and E)
G) B) and C)

Question 20

Valence Bond theory rationalizes octahedral geometry by assuming a d2sp3 hybridization pattern.

Accepted Answer

A) True 
 B)False

Exam 22: The Transition Elements and Their Coordination Compounds

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

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Give the systematic name for [CoCl3(H2O) ]-.

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Why is the +2 oxidation state so common among transition elements?

Correct AnswerverifiedThe outermost (ns2)el...View AnswerShow Answer

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

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Write the formula for pentaamminechlorocobalt(III) chloride.

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According to valence bond theory,what would be the set of hybrid orbitals used when a Period 4 transition metal forms a square planar complex?

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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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Valence Bond theory rationalizes octahedral geometry by assuming a d2sp3 hybridization pattern.

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

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

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What is the difference between a coordination compound and a complex ion?

Correct AnswerverifiedA coordination compound genera...View AnswerShow 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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Write the formula for diamminedichloroethylenediaminecobalt(III) bromide.

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In complexes of transition metals,the maximum coordination number of the metal is equal to its number of d electrons.

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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 atoms has the biggest radius?

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a.How many unpaired 3d electrons will there be in (i)high and (ii)low-spin complexes of Co(II)? b.How can high and low-spin complexes be recognized and distinguished experimentally?

Correct Answerverifieda.(i)high-spin,3 unpaired electrons(ii)...View AnswerShow Answer

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

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In the compound K[Co(C2O4) 2(H2O) 2] (where C2O42- = oxalate) the oxidation number and coordination number of cobalt are,respectively:

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Give the systematic name for [CoCl₃(H₂O) ]^-.

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The outermost (ns²)el...
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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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Valence Bond theory rationalizes octahedral geometry by assuming a d²sp³ hybridization pattern.

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

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A coordination compound genera...
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a.(i)high-spin,3 unpaired electrons
(ii)...
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In the compound K[Co(C₂O₄) ₂(H₂O) ₂] (where C₂O₄^2- = oxalate) the oxidation number and coordination number of cobalt are,respectively:

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