Question 1

Match the following.
-V

Accepted Answer

A) malachite 
B) rutile 
C) carnotite 
D) sphalerite 
E) cinnabar
F)rhodochrosite
G)galena 
A) malachite 
B) rutile 
C) carnotite 
D) sphalerite 
E) cinnabar
F)rhodochrosite
G)galena C

Question 2

Why does a "two-phase" structure occur in a substitutional alloy?

Accepted Answer

When a substitutional alloy is formed from two metals with differing crystal structures, there are some compositions (ratios of metal 1 to metal 2) that result in the presence of both crystal structures.

Question 3

What method is used to obtain pure aluminum metal from Al2O3?

Accepted Answer

A)  smelting 
B)  powder metallurgy 
C)  Hall process 
D)  leaching 
E)  calcination 
A)  smelting 
B)  powder metallurgy 
C)  Hall process 
D)  leaching 
E)  calcination C

Question 4

What are the components of brass?

Accepted Answer

A)  copper and tin 
B)  lead and aluminum 
C)  nickel and zinc 
D)  copper and zinc 
E)  zinc and lead 
A)  copper and tin 
B)  lead and aluminum 
C)  nickel and zinc 
D)  copper and zinc 
E)  zinc and lead

Question 5

Calcination is ________.

Accepted Answer

A)  heating an ore in the presence of oxygen or another substance to cause a chemical reaction that drives off newly formed volatile compounds 
B)  heating an ore in the presence of oxygen or another substance to purify the ore and obtain the liquid metal 
C)  selectively dissolving a metal in solution to separate it from its ore 
D)  the process of heating an ore to drive off volatile compounds 
E)  forming metal parts using heat and small crystals of metal 
A)  heating an ore in the presence of oxygen or another substance to cause a chemical reaction that drives off newly formed volatile compounds 
B)  heating an ore in the presence of oxygen or another substance to purify the ore and obtain the liquid metal 
C)  selectively dissolving a metal in solution to separate it from its ore 
D)  the process of heating an ore to drive off volatile compounds 
E)  forming metal parts using heat and small crystals of metal

Question 6

Match the following.
-Cu

Accepted Answer

A) malachite 
B) rutile 
C) carnotite 
D) sphalerite 
E) cinnabar
F)rhodochrosite
G)galena 
A) malachite 
B) rutile 
C) carnotite 
D) sphalerite 
E) cinnabar
F)rhodochrosite
G)galena

Question 7

Hydrometallurgy is ________.

Accepted Answer

A)  refining of metal ores using oxidation-reduction reactions 
B)  refining of metal ores using heat 
C)  refining of metal ores using reactions with aqueous solutions 
D)  forming metal parts using heat and small crystals of metal 
E)  forming tiny metal crystals using heat and water spray 
A)  refining of metal ores using oxidation-reduction reactions 
B)  refining of metal ores using heat 
C)  refining of metal ores using reactions with aqueous solutions 
D)  forming metal parts using heat and small crystals of metal 
E)  forming tiny metal crystals using heat and water spray

Question 8

Which of the following is an example of smelting?

Accepted Answer

A)  PbO(s) + CO(g)   Pb(l) + CO2(g) 
B)  2CuS(s) + 3O2   2CuO(s) + 2SO2(g) 
C)  CaCO3(s)   CaO(s) + CO2(g) 
D)  Ni(OH)2(s)   NiO(s) + H2O(g) 
E)  2Hg(l) + O2(g)   2HgO(s) 
A)  PbO(s) + CO(g)   Pb(l) + CO2(g) 
B)  2CuS(s) + 3O2   2CuO(s) + 2SO2(g) 
C)  CaCO3(s)   CaO(s) + CO2(g) 
D)  Ni(OH)2(s)   NiO(s) + H2O(g) 
E)  2Hg(l) + O2(g)   2HgO(s)

Question 9

Which of the following is TRUE concerning interstitial alloys?

Accepted Answer

A)  The metal takes on the properties of the foreign atoms once they are present. 
B)  Small atoms fit in between the metal atoms in the crystal structure. 
C)  Brass is an example of an interstitial alloy. 
D)  The foreign atoms present weaken the metallic structure. 
E)  They are alloys composed of two nonmetallic elements. 
A)  The metal takes on the properties of the foreign atoms once they are present. 
B)  Small atoms fit in between the metal atoms in the crystal structure. 
C)  Brass is an example of an interstitial alloy. 
D)  The foreign atoms present weaken the metallic structure. 
E)  They are alloys composed of two nonmetallic elements.

Question 10

Which of the following is an example of roasting?

Accepted Answer

A)  CaCO3(s)   CaO(s) + CO2(g) 
B)  PbO(s) + CO(g)   Pb(l) + CO2(g) 
C)  SnO2(s) + 2C(s)   Sn(l) + 2CO(g) 
D)  Ni(OH)2(s)   NiO(s) + H2O(g) 
E)  2CuS(s) + 3O2   2CuO(s) + 2SO2(g) 
A)  CaCO3(s)   CaO(s) + CO2(g) 
B)  PbO(s) + CO(g)   Pb(l) + CO2(g) 
C)  SnO2(s) + 2C(s)   Sn(l) + 2CO(g) 
D)  Ni(OH)2(s)   NiO(s) + H2O(g) 
E)  2CuS(s) + 3O2   2CuO(s) + 2SO2(g)

Question 11

Match the following.
-Mn

Accepted Answer

A) malachite 
B) rutile 
C) carnotite 
D) sphalerite 
E) cinnabar
F)rhodochrosite
G)galena 
A) malachite 
B) rutile 
C) carnotite 
D) sphalerite 
E) cinnabar
F)rhodochrosite
G)galena

Question 12

An interstitial alloy contains nitrogen in half of the octahedral holes of a closest-packed metal, M. What is the formula of this alloy?

Accepted Answer

A)  MN 
B)  MN2 
C)  M2N 
D)  M4N3 
E)  M8N3 
A)  MN 
B)  MN2 
C)  M2N 
D)  M4N3 
E)  M8N3

Question 13

Which of the following processes is used to form metal components from very small metal particles?

Accepted Answer

A)  electrometallurgy 
B)  hydrometallurgy 
C)  pyrometallurgy 
D)  powder metallurgy 
E)  smelting 
A)  electrometallurgy 
B)  hydrometallurgy 
C)  pyrometallurgy 
D)  powder metallurgy 
E)  smelting

Question 14

Which of the following is an example of a hydrometallurgical process?

Accepted Answer

A)  Al(OH)3(s) + SiO2(s)   AlSiO3(s) + 3H2O(g) 
B)  Ni(OH)2(s)   NiO(s) + H2O(g) 
C)  2Al(OH)3(s)   Al2O3(s) + 3H2O(g) 
D)  CuSO4∙5H2O(s) + H2O(l)   CuS(s) + H2SO4(aq) + 5OH⁻(aq) 
E)  Al2O3∙nH2O(s) + 2OH⁻(aq) + 2H2O(l)   2Al(OH)4⁻(aq) 
A)  Al(OH)3(s) + SiO2(s)   AlSiO3(s) + 3H2O(g) 
B)  Ni(OH)2(s)   NiO(s) + H2O(g) 
C)  2Al(OH)3(s)   Al2O3(s) + 3H2O(g) 
D)  CuSO4∙5H2O(s) + H2O(l)   CuS(s) + H2SO4(aq) + 5OH⁻(aq) 
E)  Al2O3∙nH2O(s) + 2OH⁻(aq) + 2H2O(l)   2Al(OH)4⁻(aq)

Question 15

An interstitial alloy contains carbon in one-fourth of the octahedral holes of a closest-packed metal, M. What is the formula of this alloy?

Accepted Answer

A)  M4C 
B)  MC4 
C)  MC 
D)  M2C 
E)  MC2 
A)  M4C 
B)  MC4 
C)  MC 
D)  M2C 
E)  MC2

Question 16

Which of the following is a general property of a metal?

Accepted Answer

A)  high resistivity 
B)  good conductor of heat 
C)  low boiling point 
D)  low melting point 
E)  high electronegativity 
A)  high resistivity 
B)  good conductor of heat 
C)  low boiling point 
D)  low melting point 
E)  high electronegativity

Question 17

Why can't chromium and nickel form a miscible solid solution over the entire composition range?

Accepted Answer

A)  The lever rule says that these two metals can't coexist in an alloy. 
B)  The two metals crystallize into different cubic structures in their pure forms. 
C)  The tetrahedral holes in the nickel crystal are not large enough to accommodate the chromium. 
D)  The octahedral holes in the chromium crystal are not large enough to accommodate the nickel. 
E)  Chromium atoms can only fit inside tetrahedral holes, which are not present in the structure of pure nickel. 
A)  The lever rule says that these two metals can't coexist in an alloy. 
B)  The two metals crystallize into different cubic structures in their pure forms. 
C)  The tetrahedral holes in the nickel crystal are not large enough to accommodate the chromium. 
D)  The octahedral holes in the chromium crystal are not large enough to accommodate the nickel. 
E)  Chromium atoms can only fit inside tetrahedral holes, which are not present in the structure of pure nickel.

Question 18

Which of the following is TRUE concerning point "D" on the figure?

Accepted Answer

A)  The alloy is composed of the BCC structure. 
B)  The alloy is composed of the FCC structure. 
C)  The alloy is composed of both FCC and BCC phases, with a larger portion of FCC present. 
D)  The alloy is composed of both FCC and BCC phases, with a larger portion of BCC present. 
E)  The alloy is composed of both FCC and BCC phases, with equal portions of each phase. 
A)  The alloy is composed of the BCC structure. 
B)  The alloy is composed of the FCC structure. 
C)  The alloy is composed of both FCC and BCC phases, with a larger portion of FCC present. 
D)  The alloy is composed of both FCC and BCC phases, with a larger portion of BCC present. 
E)  The alloy is composed of both FCC and BCC phases, with equal portions of each phase.

Question 19

Which of the following describes gangue?

Accepted Answer

A)  the undesirable product formed during smelting 
B)  the undesirable portion of a metal-containing ore 
C)  the volatile product formed during calcination 
D)  a waste material that is the product of smelting a metal ore 
E)  a crude metal that still has to be further purified for industrial use 
A)  the undesirable product formed during smelting 
B)  the undesirable portion of a metal-containing ore 
C)  the volatile product formed during calcination 
D)  a waste material that is the product of smelting a metal ore 
E)  a crude metal that still has to be further purified for industrial use

Question 20

Describe the difference between a substitutional alloy and an interstitial alloy.

Accepted Answer

A substitutional alloy just "swaps" one

Exam 24: Metals and Metallurgy

Match the following. -V

Why does a "two-phase" structure occur in a substitutional alloy?

What method is used to obtain pure aluminum metal from Al2O3?

What are the components of brass?

Calcination is ________.

Match the following. -Cu

Hydrometallurgy is ________.

Which of the following is an example of smelting?

Which of the following is TRUE concerning interstitial alloys?

Which of the following is an example of roasting?

Match the following. -Mn

An interstitial alloy contains nitrogen in half of the octahedral holes of a closest-packed metal, M. What is the formula of this alloy?

Which of the following processes is used to form metal components from very small metal particles?

Which of the following is an example of a hydrometallurgical process?

An interstitial alloy contains carbon in one-fourth of the octahedral holes of a closest-packed metal, M. What is the formula of this alloy?

Which of the following is a general property of a metal?

Why can't chromium and nickel form a miscible solid solution over the entire composition range?

Which of the following is TRUE concerning point "D" on the figure?

Which of the following describes gangue?

Describe the difference between a substitutional alloy and an interstitial alloy.

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Compounds

Filters

What method is used to obtain pure aluminum metal from Al₂O₃?