Question 1

Pig iron comes from the blast furnace.

Accepted Answer

A) True 
 B)False

Question 2

How many d electrons are there in CrO72-?

Accepted Answer

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

Question 3

MnO4-(aq)produces what manganese-containing species when used as an oxidizing agent in weakly basic solution?

Accepted Answer

A) MnO42-  
B) Mn 
C) Mn2+  
D) Mn2O3  
E) MnO2 
A) MnO42-  
B) Mn 
C) Mn2+  
D) Mn2O3  
E) MnO2

Question 4

Iron,cobalt,and nickel form the iron triad.

Accepted Answer

A) True 
 B)False

Question 5

Choose the INCORRECT statement.

Accepted Answer

A) Zinc is poisonous in trace amounts. 
B) ZnO,CdS and HgS are used as artist's pigments. 
C) The band gap is the energy difference between the conduction band and the valence band. 
D) The color of Zn,Cd,and Hg compounds depends on the width of the band gap. 
E) One proposed mechanism of mercury poisoning is that mercury compounds react with sulfur in enzymes. 
A) Zinc is poisonous in trace amounts. 
B) ZnO,CdS and HgS are used as artist's pigments. 
C) The band gap is the energy difference between the conduction band and the valence band. 
D) The color of Zn,Cd,and Hg compounds depends on the width of the band gap. 
E) One proposed mechanism of mercury poisoning is that mercury compounds react with sulfur in enzymes.

Question 6

Which is most probably the ground state electron configuration for the iron(III)ion?

Accepted Answer

A) [Ar]4s23d3  
B) [Ar]4s13d4 
C) [Ar]4s03d33p3  
D) [Ar]4s04p5  
E) [Ar]4s03d5  
A) [Ar]4s23d3  
B) [Ar]4s13d4 
C) [Ar]4s03d33p3  
D) [Ar]4s04p5  
E) [Ar]4s03d5

Question 7

For the reaction
2 Mg(s)+ O2(g)→ 2 MgO(s)
a plot of ΔG ° versus temperature has a negative slope.

Accepted Answer

A) True 
 B)False

Question 8

A mercury alloy is called an amalgam.

Accepted Answer

A) True 
 B)False

Question 9

Which element displays ferromagnetism?

Accepted Answer

A) Co 
B) Cu 
C) Ti 
D) Cr 
E) V 
A) Co 
B) Cu 
C) Ti 
D) Cr 
E) V

Question 10

The paramagnetism of transition element compounds is caused by:

Accepted Answer

A) unshared valence electron pairs 
B) unpaired electrons located in d and f orbitals 
C) unshared valence electron pairs and optimum packing of the atoms in the crystal lattice 
D) paired electrons spinning in opposite directions 
E) shared valence electron pairs 
A) unshared valence electron pairs 
B) unpaired electrons located in d and f orbitals 
C) unshared valence electron pairs and optimum packing of the atoms in the crystal lattice 
D) paired electrons spinning in opposite directions 
E) shared valence electron pairs

Question 11

Which substance is the best conductor of electricity?

Accepted Answer

A) arsenic 
B) boron 
C) silver 
D) tellurium 
A) arsenic 
B) boron 
C) silver 
D) tellurium

Question 12

List the following in order of increasing atomic radius: Ti,Cr,V,Ca.

Accepted Answer

A) V < Ti < Ca < Cr 
B) Ca < V < Cr < Ti 
C) Ca < Ti < Cr < V 
D) Cr < V < Ti < Ca 
E) Cr < V < Ca < Ti 
A) V < Ti < Ca < Cr 
B) Ca < V < Cr < Ti 
C) Ca < Ti < Cr < V 
D) Cr < V < Ti < Ca 
E) Cr < V < Ca < Ti

Question 13

Choose the INCORRECT statement about metallurgy.

Accepted Answer

A) Zone refining is refining to a certain zone of purity. 
B) Refining is the removal of impurities from a metal. 
C) The Kroll process uses Mg to reduce TiCl4 to titanium. 
D) Zone refining uses a heating coil which passes along the rod of material. 
E) In zone refining impurities remain in the molten area. 
A) Zone refining is refining to a certain zone of purity. 
B) Refining is the removal of impurities from a metal. 
C) The Kroll process uses Mg to reduce TiCl4 to titanium. 
D) Zone refining uses a heating coil which passes along the rod of material. 
E) In zone refining impurities remain in the molten area.

Question 14

The metallurgical method for obtaining a metal from its ore by roasting the ore and then reducing the resulting metal oxide is called ________.

Accepted Answer

A) zone melting 
B) pyrometallurgy 
C) leaching 
D) hydrometallurgy 
E) flotation 
A) zone melting 
B) pyrometallurgy 
C) leaching 
D) hydrometallurgy 
E) flotation

Question 15

Write the probable electron configuration for Ti2+.

Accepted Answer

A) 3d2  
B) 4s2  
C) 4s13d5  
D) 4s24d4  
E) 5s2  
A) 3d2  
B) 4s2  
C) 4s13d5  
D) 4s24d4  
E) 5s2

Question 16

Choose the INCORRECT statement.

Accepted Answer

A) Hydrometallurgy handles materials as aqueous solutions. 
B) The three steps of hydrometallurgy are leaching,purification and/or concentration and precipitation. 
C) Leaching is adding chemicals to eat away the ore,leaving the metal. 
D) Purification in hydrometallurgy is to remove impurities and concentrate solutions. 
E) Purification in hydrometallurgy may include evaporation of water,ion exchange,and/or use of activated charcoal. 
A) Hydrometallurgy handles materials as aqueous solutions. 
B) The three steps of hydrometallurgy are leaching,purification and/or concentration and precipitation. 
C) Leaching is adding chemicals to eat away the ore,leaving the metal. 
D) Purification in hydrometallurgy is to remove impurities and concentrate solutions. 
E) Purification in hydrometallurgy may include evaporation of water,ion exchange,and/or use of activated charcoal.

Question 17

The simplified equation for the reduction of iron ore is:
Fe2O3(s)+ CO(g)→ Fe(l)+ CO2(g)
When it is balanced,the coefficients are ________.

Accepted Answer

A) 1,3,2,3 
B) 1,3,1,3 
C) 1,1,1,2 
D) 2,6,3,3 
E) 1,1,2,1 
A) 1,3,2,3 
B) 1,3,1,3 
C) 1,1,1,2 
D) 2,6,3,3 
E) 1,1,2,1

Question 18

In the group of elements Cr,Ni,Sn,Pt,Ti,the one which is a main group element is ________.

Accepted Answer

A) Ni 
B) Sn 
C) Ti 
D) Pt 
E) Cr 
A) Ni 
B) Sn 
C) Ti 
D) Pt 
E) Cr

Question 19

The high melting points of transition elements result from a lack of sufficient electrons and orbitals for good metallic bonding.

Accepted Answer

A) True 
 B)False

Question 20

What is the ground-state electron configuration for the element chromium (Z = 24)?

Accepted Answer

A) [Ne] 4s23d4 
B) [Ar] 4s23d4 
C) [Ar] 4s13d5 
D) [Ar] 3d6 
A) [Ne] 4s23d4 
B) [Ar] 4s23d4 
C) [Ar] 4s13d5 
D) [Ar] 3d6

Exam 23: The Transition Elements

Pig iron comes from the blast furnace.

How many d electrons are there in CrO72-?

MnO4-(aq)produces what manganese-containing species when used as an oxidizing agent in weakly basic solution?

Iron,cobalt,and nickel form the iron triad.

Choose the INCORRECT statement.

Which is most probably the ground state electron configuration for the iron(III)ion?

For the reaction 2 Mg(s)+ O2(g)→ 2 MgO(s) a plot of ΔG ° versus temperature has a negative slope.

A mercury alloy is called an amalgam.

Which element displays ferromagnetism?

The paramagnetism of transition element compounds is caused by:

Which substance is the best conductor of electricity?

List the following in order of increasing atomic radius: Ti,Cr,V,Ca.

Choose the INCORRECT statement about metallurgy.

The metallurgical method for obtaining a metal from its ore by roasting the ore and then reducing the resulting metal oxide is called ________.

Write the probable electron configuration for Ti2+.

Choose the INCORRECT statement.

The simplified equation for the reduction of iron ore is: Fe2O3(s)+ CO(g)→ Fe(l)+ CO2(g) When it is balanced,the coefficients are ________.

In the group of elements Cr,Ni,Sn,Pt,Ti,the one which is a main group element is ________.

The high melting points of transition elements result from a lack of sufficient electrons and orbitals for good metallic bonding.

What is the ground-state electron configuration for the element chromium (Z = 24)?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

How many d electrons are there in CrO₇^2-?

MnO₄^-(aq)produces what manganese-containing species when used as an oxidizing agent in weakly basic solution?

For the reaction 2 Mg(s)+ O₂(g)→ 2 MgO(s) a plot of ΔG ° versus temperature has a negative slope.

Write the probable electron configuration for Ti²⁺.

The simplified equation for the reduction of iron ore is: Fe₂O₃(s)+ CO(g)→ Fe(l)+ CO₂(g) When it is balanced,the coefficients are ________.