Question 1

Match the following.

-Cu

Accepted Answer

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

Question 2

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 D

Question 3

Which of the following describes slag?

Accepted Answer

A) a waste material that is the product of smelting a metal ore 
B) the aqueous portion of the gangue separated from a metal ore 
C) a low-density waste product, formed from the reaction of gangue with another substance, that can be easily separated from the metal ore of interest 
D) a substance that reacts with the gangue to make a low-density liquid compound that can be easily separated from the metal of interest 
E) a heavy precipitate containing by-products obtained during the purification process 
A) a waste material that is the product of smelting a metal ore 
B) the aqueous portion of the gangue separated from a metal ore 
C) a low-density waste product, formed from the reaction of gangue with another substance, that can be easily separated from the metal ore of interest 
D) a substance that reacts with the gangue to make a low-density liquid compound that can be easily separated from the metal of interest 
E) a heavy precipitate containing by-products obtained during the purification process C

Question 4

Which of the following describes flux?

Accepted Answer

A) a waste material that is the product of smelting a metal ore 
B) the aqueous portion of the gangue separated from a metal ore 
C) a low-density waste product, formed from the reaction of gangue with another substance, that can be easily separated from the metal ore of interest 
D) a substance that reacts with the gangue to make a low-density liquid compound that can be easily separated from the metal of interest 
E) a low-density material that floats on the liquid during purification by flotation 
A) a waste material that is the product of smelting a metal ore 
B) the aqueous portion of the gangue separated from a metal ore 
C) a low-density waste product, formed from the reaction of gangue with another substance, that can be easily separated from the metal ore of interest 
D) a substance that reacts with the gangue to make a low-density liquid compound that can be easily separated from the metal of interest 
E) a low-density material that floats on the liquid during purification by flotation

Question 5

Why is zinc used to coat steel objects?

Accepted Answer

Zinc is a stronger reducing ag

Question 6

Leaching is

Accepted Answer

A) melting an ore and separating it from the lower density gangue. 
B) selectively dissolving a metal in solution to separate it from its ore. 
C) the process of heating an ore to drive off volatile compounds. 
D) heating an ore in the presence of oxygen or another substance to purify the ore and obtain the liquid metal. 
E) heating an ore in the presence of oxygen or another substance to cause a chemical reaction that drives off newly formed volatile compounds. 
A) melting an ore and separating it from the lower density gangue. 
B) selectively dissolving a metal in solution to separate it from its ore. 
C) the process of heating an ore to drive off volatile compounds. 
D) heating an ore in the presence of oxygen or another substance to purify the ore and obtain the liquid metal. 
E) heating an ore in the presence of oxygen or another substance to cause a chemical reaction that drives off newly formed volatile compounds.

Question 7

Which of the following is an example of calcination?

Accepted Answer

A) 2CuS(s)+ 3O2   2CuO(s)+ 2SO2(g) 
B) SnO2(s)+ 2C(s)   Sn(l)+ 2CO(g) 
C) CaCO3(s)+ SiO2(s)   CaSiO3(l)+ CO2(g) 
D) MgCO3(s)   MgO(s)+ CO2(g) 
E) PbO(s)+ CO(g)   Pb(l)+ CO2(g) 
A) 2CuS(s)+ 3O2   2CuO(s)+ 2SO2(g) 
B) SnO2(s)+ 2C(s)   Sn(l)+ 2CO(g) 
C) CaCO3(s)+ SiO2(s)   CaSiO3(l)+ CO2(g) 
D) MgCO3(s)   MgO(s)+ CO2(g) 
E) PbO(s)+ CO(g)   Pb(l)+ CO2(g)

Question 8

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

Accepted Answer

A substitutional alloy just "swaps" one

Question 9

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 10

Electrometallurgy is

Accepted Answer

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

Question 11

Which of the following is TRUE concerning substitutional alloys?

Accepted Answer

A) The metals involved must have similar radii. 
B) One type of metal atom is inserted in between the metal atoms in the initial crystal structure of the other metal. 
C) The two metals must be miscible over the entire composition range. 
D) Titanium carbide is an example of a substitutional alloy. 
E) The metals forming a substitutional alloy must have very different electronegativities. 
A) The metals involved must have similar radii. 
B) One type of metal atom is inserted in between the metal atoms in the initial crystal structure of the other metal. 
C) The two metals must be miscible over the entire composition range. 
D) Titanium carbide is an example of a substitutional alloy. 
E) The metals forming a substitutional alloy must have very different electronegativities.

Question 12

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 13

Identify a balanced equation for the calcination of Al(OH)3.

Accepted Answer

A) 2Al(OH)3(s)   Al2O3(s)+ 3H2O(g) 
B) Al(OH)3(s)+ SiO2(s)   AlSiO3(s)+ 3H2O(g) 
C) 2Al(OH)3(s)+ O2(g)   Al2O3(s)+ 3H2O(g) 
D) Al(OH)3(s)+ C(s)   Al2O3(s)+ CO2(g)+ H2O(g) 
E) 2Al(OH)3(s)+ 3CO(g)   Al2O3(s)+ 3CO2(g)+ 3H2O(g) 
A) 2Al(OH)3(s)   Al2O3(s)+ 3H2O(g) 
B) Al(OH)3(s)+ SiO2(s)   AlSiO3(s)+ 3H2O(g) 
C) 2Al(OH)3(s)+ O2(g)   Al2O3(s)+ 3H2O(g) 
D) Al(OH)3(s)+ C(s)   Al2O3(s)+ CO2(g)+ H2O(g) 
E) 2Al(OH)3(s)+ 3CO(g)   Al2O3(s)+ 3CO2(g)+ 3H2O(g)

Question 14

Identify the normal crystal structure at room temperature for Ni.

Accepted Answer

A) face-centred cubic 
B) body-centred cubic 
C) tetrahedral 
D) hexagonal 
E) hexagonal closest packed 
A) face-centred cubic 
B) body-centred cubic 
C) tetrahedral 
D) hexagonal 
E) hexagonal closest packed

Question 15

Which of the following is TRUE concerning point "B" 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 BCC present. 
D) The alloy is composed of both FCC and BCC phases, with a larger portion of FCC 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 BCC present. 
D) The alloy is composed of both FCC and BCC phases, with a larger portion of FCC present. 
E) The alloy is composed of both FCC and BCC phases, with equal portions of each phase.

Question 16

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 17

Roasting is

Accepted Answer

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

Question 18

Match the following.

-Mn

Accepted Answer

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

Question 19

Match the following.

-Pb

Accepted Answer

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

Question 20

Match the following.

-Ti

Accepted Answer

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

Exam 24: Metals and Metallury

Match the following. -Cu

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

Which of the following describes slag?

Which of the following describes flux?

Why is zinc used to coat steel objects?

Leaching is

Which of the following is an example of calcination?

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

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

Electrometallurgy is

Which of the following is TRUE concerning substitutional alloys?

Which of the following is an example of roasting?

Identify a balanced equation for the calcination of Al(OH)3.

Identify the normal crystal structure at room temperature for Ni.

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

Which of the following is TRUE concerning interstitial alloys?

Roasting is

Match the following. -Mn

Match the following. -Pb

Match the following. -Ti

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

Identify a balanced equation for the calcination of Al(OH)₃.