Question 1

A complex with the composition [MA2B2]X2 is found to have no geometrical isomers.Both A and B are monodentate ligands.The structure of the complex is

Accepted Answer

A)  linear.
B)  square planar.
C)  tetrahedral.
D)  octahedral.E) B) and D)
F) A) and B)

Question 2

In the coordination compound [Cr(NH3) (en) 2Cl]Br2, the coordination number (C.N.) and oxidation number (O.N.) of the metal atom are, respectively,

Accepted Answer

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

Question 3

Labile complexes are coordination complexes that

Accepted Answer

A)  are labeled with a radioactive isotope.
B)  are thermodynamically stable.
C)  are thermodynamically unstable.
D)  undergo rapid ligand exchange reactions.
E)  undergo very slow ligand exchange reactions.F) A) and C)
G) C) and D)

Question 4

The total number of electrons in the 3d orbitals of Co3+ is

Accepted Answer

A)  4
B)  5
C)  6
D)  7
E)  10F) All of the above
G) A) and B)

Question 5

Two complex ions containing Ni are [Ni(NH3) 6]2+, which is blue, and [Ni(en) 3]2+, which is purple.Which one of these statements is true?

Accepted Answer

A)  The crystal field splitting energy ( Δ\DeltaΔ ) is greater for [Ni(NH3) 6]2+ than for [Ni(en) 3]2+.
B)  [Ni(en) 3]2+ absorbs light in the violet region of the spectrum.
C)  Both complex ions are diamagnetic.
D)  The energy of the photon absorbed by [Ni(en) 3]2+ is greater than that absorbed by [Ni(NH3) 6]2+.
E)  The wavelength of the light absorbed by [Ni(en) 3]2+ is greater than the wavelength absorbed by [Ni(NH3) 6]2+. F) B) and C)
G) A) and D)

Question 6

What is the coordination number of cobalt in [Co(NH3)6]Cl3?

Accepted Answer

Question 7

Which of the following choices can function as a bidentate ligand?

Accepted Answer

A)  PH3
B)  Cl-
C)  CN-
D)  (-OCH2CH2CH2O-) 
E)  COF) None of the above
G) A) and E)

Question 8

What is the oxidation number of Co in the complex [Co(H2O)4Cl2]Cl?

Accepted Answer

Question 9

Which of these square planar complex ions can have cis-trans isomers?

Accepted Answer

A)  [Pt(NH3) 4]2+
B)  [Ni(NH3) 4]2+
C)  [Pt(NH3) 2Cl2]
D)  [Pt(NH3) Cl3]-
E)  [Ni(NH3) 3Cl]+F) A) and C)
G) A) and B)

Question 10

The best name for the complex shown below is

Accepted Answer

A)  cobalt(III) bis(ethylenediamine) bromide.
B)  dibromobis(ethylenediamine) cobalt(III) bromide.
C)  dibromidedi(ethylenediamine) cobalt(III) bromide.
D)  dibromodiethylenediaaminecobalt(III) bromide.
E)  tribromobis(ethylenediamine) cobalt(III) .F) B) and C)
G) A) and E)

Question 11

Ethylenediaminetetraacetic acid (EDTA) is

Accepted Answer

A)  not useful as a chelating agent.
B)  an effective antidote for heavy metal poisoning (e.g., Pb2+ and Hg2+) .
C)  a monodentate ligand.
D)  known to form unstable complex ions with Fe3+, Hg2+, and Zn2+.
E)  known to form complexes with platinum that inhibit the growth of cancerous cells.F) B) and C)
G) D) and E)

Question 12

Give the coordination number (C.N.) and oxidation number (O.N.) of the metal atom in the coordination compound [Cr(NH3) 2(en) Cl2].

Accepted Answer

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

Question 13

In K4[Fe(CN) 6], how many 3d electrons does the iron atom have?

Accepted Answer

A)  3
B)  4
C)  5
D)  6
E)  7F) A) and E)
G) A) and C)

Question 14

Which one of these complex ions would absorb light with the shortest wavelength?

Accepted Answer

A)  [Co(H2O) 6]2+
B)  [Co(NH3) 6]2+
C)  [CoF6]4-
D)  [Co(CN) 6]4-
E)  [Co(en) 6]2+F) C) and E)
G) A) and E)

Question 15

The electron configuration of an Fe2+ ion is

Accepted Answer

A)  [Ar]4s24d4.
B)  [Ar]4s23d6.
C)  [Ar]3d3.
D)  [Ar]3d5.
E)  [Ar]3d6.F) A) and B)
G) C) and D)

Question 16

In the coordination compound [Co(en) 2Cl2]Cl, the coordination number and oxidation number of the central atom are, respectively,

Accepted Answer

A)  4, +3.
B)  6, +2.
C)  4, +2.
D)  6, +3.
E)  4, +1.F) C) and D)
G) B) and E)

Question 17

How would you expect the molecule 1,10-phenanthroline (shown below) to function as a ligand?

Accepted Answer

A)  It would be expected to be a monodentate ligand.
B)  It would be expected to be a bidentate ligand.
C)  It would be expected to be a tridentate ligand.
D)  It would be expected to be a tetradentate ligand.
E)  It would not be expected to function as a ligand.F) All of the above
G) A) and E)

Question 18

The correct formula for pentaamminechloroplatinum(IV) chloride is:

Accepted Answer

A)  [Pt(NH3) 5Cl]Cl3
B)  [Pt(NH3) 5Cl]Cl2
C)  [Pt(NH3) 5]Cl3
D)  [Pt(NH3) 5Cl]Cl4
E)  [Pt(NH3) 5]Cl4F) B) and D)
G) A) and B)

Question 19

Which of the following complexes has optical (chiral) isomers?

Accepted Answer

A)  [Co(H2O) 4Br2]+
B)  [Co(en) Cl4] -
C)  [Co(en) (H2O) 4] 3+
D)  [Co(en) 2Cl2]+
E)  Co(H2O) 3Cl3F) D) and E)
G) C) and D)

Question 20

A molecule or atom that accepts an electron pair to form a coordinate covalent bond is called a Lewis _______.

Accepted Answer

The answer of A molecule or atom that accepts an...

Exam 23: Transition Metal Chemistry and Coordination Compounds

The total number of electrons in the 3d orbitals of Co3+ is

Correct AnswerverifiedShow Answer

A molecule or atom that accepts an electron pair to form a coordinate covalent bond is called a Lewis _______.

Correct AnswerverifiedShow Answer

Give the coordination number (C.N.) and oxidation number (O.N.) of the metal atom in the coordination compound [Cr(NH3) 2(en) Cl2].

Correct AnswerverifiedShow Answer

A complex with the composition [MA2B2]X2 is found to have no geometrical isomers.Both A and B are monodentate ligands.The structure of the complex is

Correct AnswerverifiedShow Answer

In the coordination compound [Co(en) 2Cl2]Cl, the coordination number and oxidation number of the central atom are, respectively,

Correct AnswerverifiedShow Answer

The electron configuration of an Fe2+ ion is

Correct AnswerverifiedShow Answer

Which of the following choices can function as a bidentate ligand?

Correct AnswerverifiedShow Answer

Two complex ions containing Ni are [Ni(NH3) 6]2+, which is blue, and [Ni(en) 3]2+, which is purple.Which one of these statements is true?

Correct AnswerverifiedShow Answer

Ethylenediaminetetraacetic acid (EDTA) is

Correct AnswerverifiedShow Answer

Which of these square planar complex ions can have cis-trans isomers?

Correct AnswerverifiedShow Answer

Which of the following complexes has optical (chiral) isomers?

Correct AnswerverifiedShow Answer

The correct formula for pentaamminechloroplatinum(IV) chloride is:

Correct AnswerverifiedShow Answer

In K4[Fe(CN) 6], how many 3d electrons does the iron atom have?

Correct AnswerverifiedShow Answer

Which one of these complex ions would absorb light with the shortest wavelength?

Correct AnswerverifiedShow Answer

What is the oxidation number of Co in the complex [Co(H2O)4Cl2]Cl?

Correct AnswerverifiedShow Answer

In the coordination compound [Cr(NH3) (en) 2Cl]Br2, the coordination number (C.N.) and oxidation number (O.N.) of the metal atom are, respectively,

Correct AnswerverifiedShow Answer

The best name for the complex shown below is

Correct AnswerverifiedShow Answer

Labile complexes are coordination complexes that

Correct AnswerverifiedShow Answer

What is the coordination number of cobalt in [Co(NH3)6]Cl3?

Correct AnswerverifiedShow Answer

How would you expect the molecule 1,10-phenanthroline (shown below) to function as a ligand?

Correct AnswerverifiedShow Answer

The total number of electrons in the 3d orbitals of Co³⁺ is

Correct Answer
verified

Correct Answer
verified

Give the coordination number (C.N.) and oxidation number (O.N.) of the metal atom in the coordination compound [Cr(NH₃) ₂(en) Cl₂].

Correct Answer
verified

A complex with the composition [MA₂B₂]X₂ is found to have no geometrical isomers.Both A and B are monodentate ligands.The structure of the complex is

Correct Answer
verified

In the coordination compound [Co(en) ₂Cl₂]Cl, the coordination number and oxidation number of the central atom are, respectively,

Correct Answer
verified

The electron configuration of an Fe²⁺ ion is

Correct Answer
verified

Correct Answer
verified

Two complex ions containing Ni are [Ni(NH₃) ₆]²⁺, which is blue, and [Ni(en) ₃]²⁺, which is purple.Which one of these statements is true?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

In K₄[Fe(CN) ₆], how many 3d electrons does the iron atom have?

Correct Answer
verified

Correct Answer
verified

What is the oxidation number of Co in the complex [Co(H₂O)₄Cl₂]Cl?

Correct Answer
verified

In the coordination compound [Cr(NH₃) (en) ₂Cl]Br₂, the coordination number (C.N.) and oxidation number (O.N.) of the metal atom are, respectively,

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the coordination number of cobalt in [Co(NH₃)₆]Cl₃?

Correct Answer
verified

Correct Answer
verified