Question 1

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 2

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 3

The number of geometrical isomers and optical isomers of the complex ion [Co(en)3]3+ are, respectively,

Accepted Answer

A) 2 and 2. 
B) 1 and 1. 
C) 3 and 2. 
D) 1 and 2. 
E) 2 and 4. 
A) 2 and 2. 
B) 1 and 1. 
C) 3 and 2. 
D) 1 and 2. 
E) 2 and 4.

Question 4

Write the chemical formula of triammineaquodichlorochromium(III)chloride.

Accepted Answer

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

Question 5

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 6

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 7

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 8

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 9

The correct formula for dicarbonylsilver (I)ion is:

Accepted Answer

A) Ag(CO)2 
B) [Ag(CO)2]+ 
C) [Ag(CO)2]2+ 
D) [Ag(CO)2]- 
E) [Ag(CO)2]2- 
A) Ag(CO)2 
B) [Ag(CO)2]+ 
C) [Ag(CO)2]2+ 
D) [Ag(CO)2]- 
E) [Ag(CO)2]2-

Question 10

In the complex ion [ML6]n+, Mn+ has seven d electrons and L is a weak 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 11

Which of these octahedral complexes can have cis-trans isomers?

Accepted Answer

A) Co(NH3)3Cl3 
B) [Co(NH3)5Cl]Cl2 
C) [Co(NH3)6]Cl3 
D) Na3[CoCl6] 
E) Na2[Co(NH3)Cl5] 
A) Co(NH3)3Cl3 
B) [Co(NH3)5Cl]Cl2 
C) [Co(NH3)6]Cl3 
D) Na3[CoCl6] 
E) Na2[Co(NH3)Cl5]

Question 12

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 13

In the complex ion [Fe(CN)6]4-, the oxidation number of Fe is

Accepted Answer

A) +1. 
B) +2. 
C) +3. 
D) -4. 
E) +6. 
A) +1. 
B) +2. 
C) +3. 
D) -4. 
E) +6.

Question 14

Write the chemical formula of the dibromobis(oxalato)cobaltate(III)ion.

Accepted Answer

The answer of Write the chemical formula of the dibromobis(oxalato)cobaltate(III)ion....

Question 15

The electron configuration of a nickel atom is

Accepted Answer

A) [Ar]4s23d6. 
B) [Ar]4s13d7. 
C) [Ar]3d8. 
D) [Ar]4s23d8. 
E) [Ar]3d10. 
A) [Ar]4s23d6. 
B) [Ar]4s13d7. 
C) [Ar]3d8. 
D) [Ar]4s23d8. 
E) [Ar]3d10.

Question 16

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 17

For the complex below determine 
(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 elect

Question 18

Predict the number of unpaired electrons in the [Fe(CN)6]4- ion.

Accepted Answer

Question 19

The correct formula for sodium tetracyanonickelate(II)ion is:

Accepted Answer

A) Ni(CN)4 
B) [Ni(CN)4]+ 
C) [Ni(CN)4]2+ 
D) [Ni(CN)4]- 
E) [Ni(CN)4]2- 
A) Ni(CN)4 
B) [Ni(CN)4]+ 
C) [Ni(CN)4]2+ 
D) [Ni(CN)4]- 
E) [Ni(CN)4]2-

Question 20

Which of these complex ions would absorb light with the longest 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+ 
A) [Co(H2O)6]2+ 
B) [Co(NH3)6]2+ 
C) [CoF6]4- 
D) [Co(CN)6]4- 
E) [Co(en)6]2+

Exam 23: Transition Metal Chemistry and Coordination Compounds

Cis-platinum complexes are

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

The number of geometrical isomers and optical isomers of the complex ion [Co(en)3]3+ are, respectively,

Write the chemical formula of triammineaquodichlorochromium(III)chloride.

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

Which of these ligands produces the weakest crystal field?

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

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

The correct formula for dicarbonylsilver (I)ion is:

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

Which of these octahedral complexes can have cis-trans isomers?

The electron configuration of a Ti atom is

In the complex ion [Fe(CN)6]4-, the oxidation number of Fe is

Write the chemical formula of the dibromobis(oxalato)cobaltate(III)ion.

The electron configuration of a nickel atom is

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?

For the complex below determine (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.

Predict the number of unpaired electrons in the [Fe(CN)6]4- ion.

The correct formula for sodium tetracyanonickelate(II)ion is:

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

Chemistry: the Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

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

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

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Filters

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

The number of geometrical isomers and optical isomers of the complex ion [Co(en)₃]³⁺ are, respectively,

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

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

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

In the complex ion [Fe(CN)₆]^4-, the oxidation number of Fe is

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?

Predict the number of unpaired electrons in the [Fe(CN)₆]^4- ion.