Question 1

In the complex ion [Cr(C2O4)2(H2O)2]-, the oxidation number of Cr is

Accepted Answer

A) +1. 
B) +2. 
C) +3. 
D) -2. 
E) -1. 
A) +1. 
B) +2. 
C) +3. 
D) -2. 
E) -1.

Question 2

Give (a)the oxidation number of the metal, (b)the number of d electrons, (c)the coordination number, (d)the charge of the complex ion, and (e)the number and type of ligands for the coordination compound shown below.

Accepted Answer

(a)+3, (b)3 d electr

Question 3

The coordination compound shown below has

Accepted Answer

A) two monodentate ligands and two bidentate ligands. 
B) three monodentate ligands and two bidentate ligands. 
C) four monodentate ligands and two bidentate ligands. 
D) one monodentate ligand and four bidentate ligands. 
E) four bidentate ligands. 
A) two monodentate ligands and two bidentate ligands. 
B) three monodentate ligands and two bidentate ligands. 
C) four monodentate ligands and two bidentate ligands. 
D) one monodentate ligand and four bidentate ligands. 
E) four bidentate ligands.

Question 4

Which response gives the correct coordination number (C.N.)and oxidation number (O.N.)of the transition metal atom in [Co(NH3)2(H2O)2Cl2]+?

Accepted Answer

A) C.N.= 2; O.N.= +3 
B) C.N.= 3; O.N.= +1 
C) C.N.= 4; O.N.= +2 
D) C.N.= 6; O.N.= +1 
E) C.N.= 6; O.N.= +3 
A) C.N.= 2; O.N.= +3 
B) C.N.= 3; O.N.= +1 
C) C.N.= 4; O.N.= +2 
D) C.N.= 6; O.N.= +1 
E) C.N.= 6; O.N.= +3

Question 5

In the complex ion [ML6]n+, Mn+ has five d electrons and L is a strong field ligand.According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 5 
A) 0 
B) 1 
C) 2 
D) 3 
E) 5

Question 6

The electron configuration of a Cr3+ ion is

Accepted Answer

A) [Ar]3d5. 
B) [Ar]4s13d2. 
C) [Ar]3d3. 
D) [Ar]4s13d5. 
E) [Ar]4s23d4. 
A) [Ar]3d5. 
B) [Ar]4s13d2. 
C) [Ar]3d3. 
D) [Ar]4s13d5. 
E) [Ar]4s23d4.

Question 7

The electron configuration of a Ti atom is

Accepted Answer

A) [Ne]3s23d2. 
B) [Ne] 3s24d2. 
C) [Ar]4s23d2. 
D) [Ar]4s24d2. 
E) [Ar]3d4. 
A) [Ne]3s23d2. 
B) [Ne] 3s24d2. 
C) [Ar]4s23d2. 
D) [Ar]4s24d2. 
E) [Ar]3d4.

Question 8

Cis-trans isomerism is exhibited by which one of these ions?

Accepted Answer

A) [Pd(NH3)3Cl]+ 
B) [Co(NH3)5Cl]2+ 
C) [Fe(CN)6]3- 
D) All of the above. 
E) None of the above. 
A) [Pd(NH3)3Cl]+ 
B) [Co(NH3)5Cl]2+ 
C) [Fe(CN)6]3- 
D) All of the above. 
E) None of the above.

Question 9

What is the oxidation number of Fe in [Fe(CN)6]4-?

Accepted Answer

Question 10

The total number of electrons in the 3d orbitals of a copper atom is

Accepted Answer

A) 6 
B) 7 
C) 8 
D) 9 
E) 10 
A) 6 
B) 7 
C) 8 
D) 9 
E) 10

Question 11

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). 
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).

Question 12

Which of these ligands produces the weakest crystal field?

Accepted Answer

A) CN- 
B) I- 
C) OH- 
D) H2O 
E) NH3 
A) CN- 
B) I- 
C) OH- 
D) H2O 
E) NH3

Question 13

How many unpaired electrons are there in the complex ion [Mn(CN)6]3-?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 14

In the coordination compound [Pt(NH3)2Cl2], the coordination number and oxidation number of the central atom are, respectively,

Accepted Answer

A) 2, 0. 
B) 4, 4. 
C) 5, 0. 
D) 4, 2. 
E) 6, 2. 
A) 2, 0. 
B) 4, 4. 
C) 5, 0. 
D) 4, 2. 
E) 6, 2.

Question 15

In the coordination compound K2[Co(en)Cl4], the coordination number (C.N.)and oxidation number (O.N.)of cobalt are

Accepted Answer

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

Question 16

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

Accepted Answer

A) 4 
B) 5 
C) 6 
D) 7 
E) 10 
A) 4 
B) 5 
C) 6 
D) 7 
E) 10

Question 17

Cis-platinum complexes are

Accepted Answer

A) used in the extraction of silver and gold. 
B) effective antidotes for heavy metal poisoning (e.g., Pb2+ and Hg2+). 
C) used to provide nutrients for plants. 
D) used to prevent eutrophication of lakes. 
E) effective antitumor agents. 
A) used in the extraction of silver and gold. 
B) effective antidotes for heavy metal poisoning (e.g., Pb2+ and Hg2+). 
C) used to provide nutrients for plants. 
D) used to prevent eutrophication of lakes. 
E) effective antitumor agents.

Question 18

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

Question 19

Write the chemical formula of triammineaquodichlorochromium(III)chloride.

Accepted Answer

The answer of Write the chemical formula of triammineaquodichlorochromium(III)chloride....

Question 20

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

Accepted Answer

Exam 22: Transition Metal Chemistry and Coordination Compounds

In the complex ion [Cr(C2O4)2(H2O)2]-, the oxidation number of Cr is

Give (a)the oxidation number of the metal, (b)the number of d electrons, (c)the coordination number, (d)the charge of the complex ion, and (e)the number and type of ligands for the coordination compound shown below.

The coordination compound shown below has

Which response gives the correct coordination number (C.N.)and oxidation number (O.N.)of the transition metal atom in [Co(NH3)2(H2O)2Cl2]+?

In the complex ion [ML6]n+, Mn+ has five d electrons and L is a strong field ligand.According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

The electron configuration of a Cr3+ ion is

The electron configuration of a Ti atom is

Cis-trans isomerism is exhibited by which one of these ions?

What is the oxidation number of Fe in [Fe(CN)6]4-?

The total number of electrons in the 3d orbitals of a copper atom is

The best name for the complex shown below is

Which of these ligands produces the weakest crystal field?

How many unpaired electrons are there in the complex ion [Mn(CN)6]3-?

In the coordination compound [Pt(NH3)2Cl2], the coordination number and oxidation number of the central atom are, respectively,

In the coordination compound K2[Co(en)Cl4], the coordination number (C.N.)and oxidation number (O.N.)of cobalt are

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

Cis-platinum complexes are

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

Write the chemical formula of triammineaquodichlorochromium(III)chloride.

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

Chemistry: The Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solution

Gases

Thermo-Chemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

Electrochemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Nuclear Chemistry

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

In the complex ion [Cr(C₂O₄)₂(H₂O)₂]^-, the oxidation number of Cr is

Which response gives the correct coordination number (C.N.)and oxidation number (O.N.)of the transition metal atom in [Co(NH₃)₂(H₂O)₂Cl₂]⁺?

In the complex ion [ML₆]ⁿ⁺, Mⁿ⁺ has five d electrons and L is a strong field ligand.According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

The electron configuration of a Cr³⁺ ion is

What is the oxidation number of Fe in [Fe(CN)₆]^4-?

How many unpaired electrons are there in the complex ion [Mn(CN)₆]^3-?

In the coordination compound [Pt(NH₃)₂Cl₂], the coordination number and oxidation number of the central atom are, respectively,

In the coordination compound K₂[Co(en)Cl₄], the coordination number (C.N.)and oxidation number (O.N.)of cobalt are

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

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