Question 1

-Which of the above are ligands that contain two or more donor atoms?

Accepted Answer

A) All contain two or more donor atoms. 
B) (a)and (b) 
C) (c)and (d) 
D) None contain two or more donor atoms. 
A) All contain two or more donor atoms. 
B) (a)and (b) 
C) (c)and (d) 
D) None contain two or more donor atoms.

Question 2

The first transition series metals are shown below.  
-Which has the most positive standard oxidation potential?

Accepted Answer

A) Sc 
B) V 
C) Cu 
D) Zn 
A) Sc 
B) V 
C) Cu 
D) Zn

Question 3

The coordination number of chromium in [Cr(EDTA)]- is ________.

Accepted Answer

Question 4

The color exhibited by coordination compounds is usually due to the absorption of light by a d-electron,resulting in the promotion of the d-electron from its ground-state d-orbital to a higher energy orbital.The first transition series element expected to have a colorless aqueous solution M2+ ion is ________.

Accepted Answer

Question 5

-Which element indicated on the above periodic table has the electron configuration [Xe] 4f7 5d1 6s2?

Accepted Answer

A) element A 
B) element B 
C) element C 
D) element D 
A) element A 
B) element B 
C) element C 
D) element D

Question 6

Which first row transition element has the highest melting point?

Accepted Answer

A) Sc 
B) V 
C) Fe 
D) Zn 
A) Sc 
B) V 
C) Fe 
D) Zn

Question 7

What chemical equation represents the best method for obtaining pure chromium?

Accepted Answer

A) FeCr2O4(s)+ 4 C(s)+ heat → Fe(s)+ 2 Cr(s)+ 4 CO(g) 
B) Cr2O3(s)+ 2 Al(s)+ heat → 2 Cr(s)+ Al2O3(s) 
C) Cr2O3(s)+ 2 Fe(s)+ heat → Fe2O3(s)+ 2 Cr(s) 
D) Cr2+(aq)+ H2(g)→ Cr(s)+ 2 H+(aq) 
A) FeCr2O4(s)+ 4 C(s)+ heat → Fe(s)+ 2 Cr(s)+ 4 CO(g) 
B) Cr2O3(s)+ 2 Al(s)+ heat → 2 Cr(s)+ Al2O3(s) 
C) Cr2O3(s)+ 2 Fe(s)+ heat → Fe2O3(s)+ 2 Cr(s) 
D) Cr2+(aq)+ H2(g)→ Cr(s)+ 2 H+(aq)

Question 8

Which complex cannot exist as enantiomers?

Accepted Answer

A) [CoCl2(H2O)4]+ 
B) [Co(en)3]3+ 
C) cis-[CrCl2(C2O4)2]+ 
D) [Fe(C2O4)2(en)]- 
A) [CoCl2(H2O)4]+ 
B) [Co(en)3]3+ 
C) cis-[CrCl2(C2O4)2]+ 
D) [Fe(C2O4)2(en)]-

Question 9

What is the highest possible oxidation state for chromium?

Accepted Answer

A) +3 
B) +4 
C) +5 
D) +6 
A) +3 
B) +4 
C) +5 
D) +6

Question 10

The oxidation state of chromium in Cr2O72- is ________.

Accepted Answer

Question 11

Write the chemical formula for pentaamminenitritocobalt(III)ion.

Accepted Answer

A) [Co(NO)(NH3)5]3+ 
B) [Co(NO2)(NH3)5]2+ 
C) [Co(ONO)(NH3)5]2+ 
D) [Co(NH3)5(N2O)]2+ 
A) [Co(NO)(NH3)5]3+ 
B) [Co(NO2)(NH3)5]2+ 
C) [Co(ONO)(NH3)5]2+ 
D) [Co(NH3)5(N2O)]2+

Question 12

The coordination number of cobalt in [Co(NH3)4Cl2]Cl is ________.

Accepted Answer

Question 13

The first transition series metals are shown below.  
-Based on the variation in Zeff,which oxoanion should be the weakest oxidizing agent?

Accepted Answer

A) VO43- 
B) CrO42- 
C) MnO42- 
D) FeO42- 
A) VO43- 
B) CrO42- 
C) MnO42- 
D) FeO42-

Question 14

A complex ion that has a broad absorption band at 625 nm in its visible absorption spectrum will appear to be

Accepted Answer

A) blue 
B) colorless 
C) red 
D) yellow 
A) blue 
B) colorless 
C) red 
D) yellow

Question 15

-Which is the crystal field energy level diagram for a square pyramidal ML5 complex that contains a single ligand on the z-axis?

Accepted Answer

A) (
A)  
B) (
B)  
C) (
C)  
D) (
D)  
A) (
A)  
B) (
B)  
C) (
C)  
D) (
D)

Question 16

The complex [Ni(CN)4]2- is diamagnetic and the complex [NiCl4]2- is paramagnetic.What can you conclude about their molecular geometries?

Accepted Answer

A) Both complexes have square planar geometries. 
B) Both complexes have tetrahedral geometries. 
C) [NiCl4]2- has a square planar geometry while [Ni(CN)4]2- has a tetrahedral geometry. 
D) [NiCl4]2- has a tetrahedral geometry while [Ni(CN)4]2- has a square planar geometry. 
A) Both complexes have square planar geometries. 
B) Both complexes have tetrahedral geometries. 
C) [NiCl4]2- has a square planar geometry while [Ni(CN)4]2- has a tetrahedral geometry. 
D) [NiCl4]2- has a tetrahedral geometry while [Ni(CN)4]2- has a square planar geometry.

Question 17

Which of the following can function as a bidentate ligand?

Accepted Answer

A) CO   
B) OH - 
C) N H3  
D) C2O4    2- 
A) CO   
B) OH - 
C) N H3  
D) C2O4    2-

Question 18

The third transition series metals are shown below.  
-Which has the lowest density?

Accepted Answer

A) La 
B) W 
C) Os 
D) Hg 
A) La 
B) W 
C) Os 
D) Hg

Question 19

Which Pt(II)complexes are geometric isomers of each other?

Accepted Answer

A) (a)and (f) 
B) (b)and (e) 
C) (c)and (d) 
D) (a)and (b) 
A) (a)and (f) 
B) (b)and (e) 
C) (c)and (d) 
D) (a)and (b)

Question 20

What is the crystal field energy level diagram for the complex [Fe(H2O)6]3+?

Accepted Answer

A) (
A)  
B) (
B)  
C) (
C)  
D) (
D)  
A) (
A)  
B) (
B)  
C) (
C)  
D) (
D)

Exam 20: Transition Elements and Coordination Chemistry

-Which of the above are ligands that contain two or more donor atoms?

The first transition series metals are shown below. -Which has the most positive standard oxidation potential?

The coordination number of chromium in [Cr(EDTA)]- is ________.

-Which element indicated on the above periodic table has the electron configuration [Xe] 4f7 5d1 6s2?

Which first row transition element has the highest melting point?

What chemical equation represents the best method for obtaining pure chromium?

Which complex cannot exist as enantiomers?

What is the highest possible oxidation state for chromium?

The oxidation state of chromium in Cr2O72- is ________.

Write the chemical formula for pentaamminenitritocobalt(III)ion.

The coordination number of cobalt in [Co(NH3)4Cl2]Cl is ________.

The first transition series metals are shown below. -Based on the variation in Zeff,which oxoanion should be the weakest oxidizing agent?

A complex ion that has a broad absorption band at 625 nm in its visible absorption spectrum will appear to be

-Which is the crystal field energy level diagram for a square pyramidal ML5 complex that contains a single ligand on the z-axis?

The complex [Ni(CN)4]2- is diamagnetic and the complex [NiCl4]2- is paramagnetic.What can you conclude about their molecular geometries?

Which of the following can function as a bidentate ligand?

The third transition series metals are shown below. -Which has the lowest density?

Which Pt(II)complexes are geometric isomers of each other?

What is the crystal field energy level diagram for the complex [Fe(H2O)6]3+?

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

The coordination number of chromium in [Cr(EDTA)]^- is ________.

-Which element indicated on the above periodic table has the electron configuration [Xe] 4f⁷ 5d¹ 6s²?

The oxidation state of chromium in Cr₂O₇^2- is ________.

The coordination number of cobalt in [Co(NH₃)₄Cl₂]Cl is ________.

The first transition series metals are shown below. -Based on the variation in Z_eff,which oxoanion should be the weakest oxidizing agent?

-Which is the crystal field energy level diagram for a square pyramidal ML₅ complex that contains a single ligand on the z-axis?

The complex [Ni(CN)₄]^2- is diamagnetic and the complex [NiCl₄]^2- is paramagnetic.What can you conclude about their molecular geometries?

What is the crystal field energy level diagram for the complex [Fe(H₂O)₆]³⁺?