Question 1

If M represents a transition element, which of the following oxides should be the least basic?

Accepted Answer

A)  MO 
B)  M2O 
C)  M2O3 
D)  MO2 
E)  MO3 
A)  MO 
B)  M2O 
C)  M2O3 
D)  MO2 
E)  MO3

Question 2

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)  dsp2 
A)  d2sp 
B)  d2p2 
C)  dsp3 
D)  sp3 
E)  dsp2

Question 3

All the actinide series of transition elements are radioactive.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following will be diamagnetic?

Accepted Answer

A)  Ni2+ 
B)  Cr2+ 
C)  Mn2+ 
D)  Co3+ 
E)  Ti4+ 
A)  Ni2+ 
B)  Cr2+ 
C)  Mn2+ 
D)  Co3+ 
E)  Ti4+

Question 5

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

Accepted Answer

A coordination compound genera

Question 6

A) Explain how the crystal field theory can use the magnitude of the splitting energy $\Delta$ to provide an explanation of the color and magnetic properties of octahedral complexes.
B) In promoting an electron from the t2g set of orbitals to the eg set, an octahedral complex absorbs a photon with a wavelength $\lambda$ of 523 nm. Calculate the value of $\Delta$ in the complex, in kJ/mol.

Accepted Answer

A) The energy needed for a photon to exc

Question 7

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

Accepted Answer

A)  d2sp 
B)  dsp2 
C)  dsp3 
D)  sp3 
E)  d2p2 
A)  d2sp 
B)  dsp2 
C)  dsp3 
D)  sp3 
E)  d2p2

Question 8

The permanganate ion (MnO4¯) is a powerful reducing agent.

Accepted Answer

A) True 
 B)False

Question 9

What geometry is particularly common for complexes of d10 metal ions?

Accepted Answer

Question 10

Which one of the following normally acts as a bidentate ligand in complexes with transition metal ions?

Accepted Answer

A)  CN¯ 
B)  EDTA4¯ 
C)  SCN¯ 
D)  ethylene diamine 
E)  ethylene, C2H4 
A)  CN¯ 
B)  EDTA4¯ 
C)  SCN¯ 
D)  ethylene diamine 
E)  ethylene, C2H4

Question 11

The crystal field splitting energy, $\Delta$,

Accepted Answer

A)  is larger for tetrahedral complexes than for octahedral complexes. 
B)  depends on the metal but not on the ligand. 
C)  determines the color of a complex. 
D)  is larger for ionic ligands like chloride than for molecular ligands like carbon monoxide, CO. 
E)  determines the charge of a complex. 
A)  is larger for tetrahedral complexes than for octahedral complexes. 
B)  depends on the metal but not on the ligand. 
C)  determines the color of a complex. 
D)  is larger for ionic ligands like chloride than for molecular ligands like carbon monoxide, CO. 
E)  determines the charge of a complex.

Question 12

What is the coordination number of cobalt in the complex ion [Co(en)Cl4]¯? (en = ethylenediamine)

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  6 
E)  8 
A)  1 
B)  2 
C)  4 
D)  6 
E)  8

Question 13

In a coordination compound involving a complex ion of square planar geometry, which of the following types of isomerism is/are never possible?

Accepted Answer

A)  geometric 
B)  optical 
C)  linkage 
D)  coordination 
E)  more than one of the choices 
A)  geometric 
B)  optical 
C)  linkage 
D)  coordination 
E)  more than one of the choices

Question 14

The ground state electron configuration of a transition element atom cannot have more than one incomplete subshell.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following will be paramagnetic?

Accepted Answer

A)  V5+ 
B)  Ni2+ 
C)  Mn7+ 
D)  Ti4+ 
E)  Zn 
A)  V5+ 
B)  Ni2+ 
C)  Mn7+ 
D)  Ti4+ 
E)  Zn

Question 16

The M2+ ions of the first transition series of elements all have the general electronic configuration [Ar]4s23dx, where x is an integer from 1 to 8.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is not a property of silver that is important in black and white photography?

Accepted Answer

A)  Silver halides are not soluble in water. 
B)  Silver metal is easily oxidized. 
C)  Silver halides undergo a redox reaction when exposed to light. 
D)  Silver ions will form stable, water-soluble complex ions. 
E)  Silver atoms catalyze the reduction of silver ions. 
A)  Silver halides are not soluble in water. 
B)  Silver metal is easily oxidized. 
C)  Silver halides undergo a redox reaction when exposed to light. 
D)  Silver ions will form stable, water-soluble complex ions. 
E)  Silver atoms catalyze the reduction of silver ions.

Question 18

In the compound [Ni(en)2(H2O)2]SO4 (where en = ethylenediamine) the oxidation number and coordination number of nickel are, respectively:

Accepted Answer

A)  2 and 6. 
B)  4 and 6. 
C)  6 and 6. 
D)  2 and 4. 
E)  4 and 4. 
A)  2 and 6. 
B)  4 and 6. 
C)  6 and 6. 
D)  2 and 4. 
E)  4 and 4.

Question 19

A feature of transition metal chemistry is that these elements exhibit multiple oxidation states. Which one of the following elements exhibits the smallest number of different oxidation states?

Accepted Answer

A)  Ti 
B)  Cr 
C)  Mn 
D)  Co 
E)  Zn 
A)  Ti 
B)  Cr 
C)  Mn 
D)  Co 
E)  Zn

Question 20

Consider the following octahedral complex structures, each involving ethylene diamine and two different, unidentate ligands X and Y.   Which one of the following statements about these structures is incorrect?

Accepted Answer

A)  Structures 1 and 2 are optical isomers. 
B)  Structures 1 and 3 are optical isomers. 
C)  Structures 1 and 3 are different complexes. 
D)  Structures 1 and 4 are geometrical isomers. 
E)  Structures 3 and 4 are the same complex. 
A)  Structures 1 and 2 are optical isomers. 
B)  Structures 1 and 3 are optical isomers. 
C)  Structures 1 and 3 are different complexes. 
D)  Structures 1 and 4 are geometrical isomers. 
E)  Structures 3 and 4 are the same complex.

Exam 23: The Transition Elements and Their Coordination Compounds

If M represents a transition element, which of the following oxides should be the least basic?

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?

All the actinide series of transition elements are radioactive.

Which of the following will be diamagnetic?

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

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

The permanganate ion (MnO4¯) is a powerful reducing agent.

What geometry is particularly common for complexes of d10 metal ions?

Which one of the following normally acts as a bidentate ligand in complexes with transition metal ions?

The crystal field splitting energy, Δ\DeltaΔ ,

What is the coordination number of cobalt in the complex ion [Co(en)Cl4]¯? (en = ethylenediamine)

In a coordination compound involving a complex ion of square planar geometry, which of the following types of isomerism is/are never possible?

The ground state electron configuration of a transition element atom cannot have more than one incomplete subshell.

Which of the following will be paramagnetic?

The M2+ ions of the first transition series of elements all have the general electronic configuration [Ar]4s23dx, where x is an integer from 1 to 8.

Which of the following is not a property of silver that is important in black and white photography?

In the compound [Ni(en)2(H2O)2]SO4 (where en = ethylenediamine) the oxidation number and coordination number of nickel are, respectively:

A feature of transition metal chemistry is that these elements exhibit multiple oxidation states. Which one of the following elements exhibits the smallest number of different oxidation states?

Consider the following octahedral complex structures, each involving ethylene diamine and two different, unidentate ligands X and Y. Which one of the following statements about these structures is incorrect?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Nuclear Reactions and Their Applications

Filters

The permanganate ion (MnO₄¯) is a powerful reducing agent.

What geometry is particularly common for complexes of d¹⁰ metal ions?

The crystal field splitting energy, $\Delta$ ,

What is the coordination number of cobalt in the complex ion [Co(en)Cl₄]¯? (en = ethylenediamine)

The M²⁺ ions of the first transition series of elements all have the general electronic configuration [Ar]4s²3d^x, where x is an integer from 1 to 8.

In the compound [Ni(en)₂(H₂O)₂]SO₄ (where en = ethylenediamine) the oxidation number and coordination number of nickel are, respectively: