Question 1

Which of these reactions represents the removal of silica from iron ore in a blast furnace?

Accepted Answer

A)  SiO2(s) → SiO2(g) 
B)  SiO2(s) + CaO(s) → CaSiO3(l) 
C)  SiO2(s) + 4HF(g) → SiF4(g) + 2H2O(g) 
D)  SiO2(s) + C(s) → Si(l) + CO2(g) 
E)  SiO2(s) + CO(g) → SiCO3(l) 
A)  SiO2(s) → SiO2(g) 
B)  SiO2(s) + CaO(s) → CaSiO3(l) 
C)  SiO2(s) + 4HF(g) → SiF4(g) + 2H2O(g) 
D)  SiO2(s) + C(s) → Si(l) + CO2(g) 
E)  SiO2(s) + CO(g) → SiCO3(l)

Question 2

Which diagram best corresponds to the energy level diagram of a semiconductor?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 3

In the production of aluminum, bauxite is heated with sodium hydroxide solution to ________.

Accepted Answer

A)  remove titanium(IV) oxide 
B)  remove silica 
C)  remove iron oxides 
D)  remove potassium 
E)  remove fluorides 
A)  remove titanium(IV) oxide 
B)  remove silica 
C)  remove iron oxides 
D)  remove potassium 
E)  remove fluorides

Question 4

The Hall process involves the reduction of Al2O3 to aluminum by

Accepted Answer

A)  carbon (coke). 
B)  carbon monoxide. 
C)  molecular hydrogen. 
D)  sodium. 
E)  electrolysis. 
A)  carbon (coke). 
B)  carbon monoxide. 
C)  molecular hydrogen. 
D)  sodium. 
E)  electrolysis.

Question 5

A mineral deposit concentrated enough to allow economical recovery of a desired metal is known as ________.

Accepted Answer

The answer of A mineral deposit concentrated enough to allow...

Question 6

What is the chemical formula for phosphate rock?

Accepted Answer

A)  Na3PO4 
B)  Na3P 
C)  Mg3(PO4)2 
D)  AlPO4 
E)  Ca3(PO4)2 
A)  Na3PO4 
B)  Na3P 
C)  Mg3(PO4)2 
D)  AlPO4 
E)  Ca3(PO4)2

Question 7

In gunpowder, which component is present in the highest percent by mass?

Accepted Answer

A)  Wood charcoal 
B)  Chile salt peter 
C)  Potassium nitrate 
D)  Sulfur 
E)  Ammonia 
A)  Wood charcoal 
B)  Chile salt peter 
C)  Potassium nitrate 
D)  Sulfur 
E)  Ammonia

Question 8

The process used to produce metals with a purity of more than 99.99% is called

Accepted Answer

A)  zone refining. 
B)  electrorefining. 
C)  distillation. 
D)  sublimation. 
E)  alloying. 
A)  zone refining. 
B)  electrorefining. 
C)  distillation. 
D)  sublimation. 
E)  alloying.

Question 9

Which reaction is a good small-scale laboratory method for the preparation of hydrogen?

Accepted Answer

A)  CH4(g) + H2O(g) → CO(g) + 3H2(g) 
B)  3FeCl2(s) + 4H2O(g) → Fe3O4(s) + 6HCl(g) + H2(g) 
C)  NaH(s) + H2O(l) → NaOH(aq) + H2(g) 
D)  CO(g) + H2O(g) → CO2(g) + H2(g) 
E)  None of these methods is useful. 
A)  CH4(g) + H2O(g) → CO(g) + 3H2(g) 
B)  3FeCl2(s) + 4H2O(g) → Fe3O4(s) + 6HCl(g) + H2(g) 
C)  NaH(s) + H2O(l) → NaOH(aq) + H2(g) 
D)  CO(g) + H2O(g) → CO2(g) + H2(g) 
E)  None of these methods is useful.

Question 10

The first step in the purification of a metal M is represented by the following figure. To which process does the figure correspond, and which metal is usually purified by this process?

Accepted Answer

A)  The Mond process, for the purification of Zn 
B)  The Mond process, for the purification of Ni 
C)  The Hall process, for the purification of Al 
D)  The Hall process, for the purification of Cr 
E)  The zone refining process, for the purification of Fe 
A)  The Mond process, for the purification of Zn 
B)  The Mond process, for the purification of Ni 
C)  The Hall process, for the purification of Al 
D)  The Hall process, for the purification of Cr 
E)  The zone refining process, for the purification of Fe

Question 11

Nickel is often purified using

Accepted Answer

A)  amalgamation. 
B)  the Hall process. 
C)  the Mond process. 
D)  pressurization. 
E)  a blast furnace. 
A)  amalgamation. 
B)  the Hall process. 
C)  the Mond process. 
D)  pressurization. 
E)  a blast furnace.

Question 12

Beryllium, the first element in Group 2A, is the most metallic element in the group.

Accepted Answer

A) True 
 B)False

Question 13

What is the science and technology of separating metals from their ores and of compounding alloys?

Accepted Answer

The answer of What is the science and technology of...

Question 14

Which of these ions is most likely to substitute for Ca2+ in the human body?

Accepted Answer

A)  Cl- 
B)  Sr2+ 
C)  K+ 
D)  S2- 
E)  Pb2+ 
A)  Cl- 
B)  Sr2+ 
C)  K+ 
D)  S2- 
E)  Pb2+

Question 15

Seawater is a good source of which of the following metals?

Accepted Answer

A)  Cu 
B)  Au 
C)  Mg 
D)  Cl 
E)  Ca 
A)  Cu 
B)  Au 
C)  Mg 
D)  Cl 
E)  Ca

Question 16

The following electrolytic cell is a representation of the process used to purify copper metal. How does it work?

Accepted Answer

A)  Impure copper is oxidized at the anode, and pure copper is reduced at the cathode. Impurities dissolve into solution. 
B)  Impure copper is oxidized at the cathode, and pure copper is reduced at the anode. Impurities dissolve into solution. 
C)  Impure copper is oxidized at the anode, and pure copper dissolves into solution. Impurities remain on the cathode. 
D)  Impure copper is oxidized at the cathode, and pure copper dissolves into solution. Impurities remain on the anode. 
E)  Impure copper precipitates from solution onto the cathode, and pure copper remains on the anode. 
A)  Impure copper is oxidized at the anode, and pure copper is reduced at the cathode. Impurities dissolve into solution. 
B)  Impure copper is oxidized at the cathode, and pure copper is reduced at the anode. Impurities dissolve into solution. 
C)  Impure copper is oxidized at the anode, and pure copper dissolves into solution. Impurities remain on the cathode. 
D)  Impure copper is oxidized at the cathode, and pure copper dissolves into solution. Impurities remain on the anode. 
E)  Impure copper precipitates from solution onto the cathode, and pure copper remains on the anode.

Question 17

Alloying a metal is done to

Accepted Answer

A)  make its extraction from its ore easier. 
B)  convert the metal to an oxide. 
C)  disguise the true identity of the metal. 
D)  prepare ultrapure metal samples. 
E)  enhance properties, like conductivity. 
A)  make its extraction from its ore easier. 
B)  convert the metal to an oxide. 
C)  disguise the true identity of the metal. 
D)  prepare ultrapure metal samples. 
E)  enhance properties, like conductivity.

Question 18

Mercury, magnesium, and zinc have low enough boiling points that they can be purified by distillation.

Accepted Answer

A) True 
 B)False

Question 19

In the Hall process, ________ is reduced ________.

Accepted Answer

A)  nickel; electrolytically 
B)  aluminum; electrolytically 
C)  nickel; by reaction with metallic sodium 
D)  aluminum; by reaction with metallic sodium 
E)  copper; electrolytically 
A)  nickel; electrolytically 
B)  aluminum; electrolytically 
C)  nickel; by reaction with metallic sodium 
D)  aluminum; by reaction with metallic sodium 
E)  copper; electrolytically

Question 20

What metallurgical process is used to obtain aluminum metal?

Accepted Answer

Electrolytic reducti

Exam 24: Nonmetallic Elements and Their Compounds

Which of these reactions represents the removal of silica from iron ore in a blast furnace?

Which diagram best corresponds to the energy level diagram of a semiconductor?

In the production of aluminum, bauxite is heated with sodium hydroxide solution to ________.

The Hall process involves the reduction of Al2O3 to aluminum by

A mineral deposit concentrated enough to allow economical recovery of a desired metal is known as ________.

What is the chemical formula for phosphate rock?

In gunpowder, which component is present in the highest percent by mass?

The process used to produce metals with a purity of more than 99.99% is called

Which reaction is a good small-scale laboratory method for the preparation of hydrogen?

The first step in the purification of a metal M is represented by the following figure. To which process does the figure correspond, and which metal is usually purified by this process?

Nickel is often purified using

Beryllium, the first element in Group 2A, is the most metallic element in the group.

What is the science and technology of separating metals from their ores and of compounding alloys?

Which of these ions is most likely to substitute for Ca2+ in the human body?

Seawater is a good source of which of the following metals?

The following electrolytic cell is a representation of the process used to purify copper metal. How does it work?

Alloying a metal is done to

Mercury, magnesium, and zinc have low enough boiling points that they can be purified by distillation.

In the Hall process, ________ is reduced ________.

What metallurgical process is used to obtain aluminum metal?

Chemistry: the Central Science

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

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

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Organic Chemistry

Filters

The Hall process involves the reduction of Al₂O₃ to aluminum by

Which of these ions is most likely to substitute for Ca²⁺ in the human body?

In the Hall process, is reduced .