Question 1

Powder metallurgy is ________.

Accepted Answer

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

Question 2

Which substance is the best conductor of electricity?

Accepted Answer

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

Question 3

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 4

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

Accepted Answer

A)  MH 
B)  MH4 
C)  MH2 
D)  M2H 
E)  M4H 
A)  MH 
B)  MH4 
C)  MH2 
D)  M2H 
E)  M4H

Question 5

Identify a balanced equation for the calcination of NiCO3.

Accepted Answer

A)  NiCO3(s) + CaO(s)   NiO(s) + CaCO3(s) 
B)  NiCO3(s)   NiO(s) + CO2(g) 
C)  NiCO3(s) + C(s)   NiO(s) + 2CO(g) 
D)  2NiCO3(s)   2Ni(l) + 2CO2(g) + O2(g) 
E)  NiCO3(s) + CO(g)   NiO(s) + 2CO2(g) 
A)  NiCO3(s) + CaO(s)   NiO(s) + CaCO3(s) 
B)  NiCO3(s)   NiO(s) + CO2(g) 
C)  NiCO3(s) + C(s)   NiO(s) + 2CO(g) 
D)  2NiCO3(s)   2Ni(l) + 2CO2(g) + O2(g) 
E)  NiCO3(s) + CO(g)   NiO(s) + 2CO2(g)

Question 6

Match the following.
-Hg

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

Smelting is ________.

Accepted Answer

A)  heating an ore in the presence of oxygen or another substance to purify the ore and obtain the liquid metal 
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 cause a chemical reaction that drives off newly formed 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 purify the ore and obtain the liquid metal 
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 cause a chemical reaction that drives off newly formed volatile compounds 
E)  forming metal parts using heat and small crystals of metal

Question 8

Identify the substances that are homogeneous, naturally occurring, crystalline inorganic solids.

Accepted Answer

A)  slag 
B)  minerals 
C)  ores 
D)  gangue 
E)  alloy 
A)  slag 
B)  minerals 
C)  ores 
D)  gangue 
E)  alloy

Question 9

Match the following.
-Pb

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 10

Identify a balanced reaction for the smelting of SnO2 with carbon.

Accepted Answer

A)  SnO2(s) + CO2(g)   SnCO3(s) 
B)  SnO2(s) + CaCO3(s)   SnC(s) + CaO(s) + O2(g) 
C)  SnO2(s) + 2C(s)   Sn(l) + 2CO(g) 
D)  2SnO2(s) + 2CaC2(s)   2SnC2(s) + 2CaO(s) + O2(g) 
E)  SnO2(s) + 2CO(g)   Sn(l) + 2CO2(g) 
A)  SnO2(s) + CO2(g)   SnCO3(s) 
B)  SnO2(s) + CaCO3(s)   SnC(s) + CaO(s) + O2(g) 
C)  SnO2(s) + 2C(s)   Sn(l) + 2CO(g) 
D)  2SnO2(s) + 2CaC2(s)   2SnC2(s) + 2CaO(s) + O2(g) 
E)  SnO2(s) + 2CO(g)   Sn(l) + 2CO2(g)

Question 11

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 12

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 13

Why is zinc used to coat steel objects?

Accepted Answer

Zinc is a stronger reducing ag

Question 14

Which of the following is TRUE of powder metallurgy?

Accepted Answer

A)  Machining is required after forming the component. 
B)  Porous metal sponge is used as a starting material for forming parts. 
C)  Iron powder from mill scrap makes a denser component than iron particles formed through water atomization. 
D)  It is used to separate gangue from the rest of the metal ore. 
E)  It usually requires lower temperatures than casting the molten metal. 
A)  Machining is required after forming the component. 
B)  Porous metal sponge is used as a starting material for forming parts. 
C)  Iron powder from mill scrap makes a denser component than iron particles formed through water atomization. 
D)  It is used to separate gangue from the rest of the metal ore. 
E)  It usually requires lower temperatures than casting the molten metal.

Question 15

Match the following.
-Ti

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 16

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 17

Which compound in the following reaction is the slag? 
2Ca3(PO4)2(s) + 6SiO2(s) + 10C(s)   P4(g) + 6CaSiO3(l) + 10CO(g)

Accepted Answer

A)  CaSiO3 
B)  CO 
C)  P4 
D)  SiO2 
E)  Ca3(PO4)2 
A)  CaSiO3 
B)  CO 
C)  P4 
D)  SiO2 
E)  Ca3(PO4)2

Question 18

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 19

Match the following.
-Zn

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 20

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

Exam 24: Metals and Metallurgy

Powder metallurgy is ________.

Which substance is the best conductor of electricity?

Roasting is ________.

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

Identify a balanced equation for the calcination of NiCO3.

Match the following. -Hg

Smelting is ________.

Identify the substances that are homogeneous, naturally occurring, crystalline inorganic solids.

Match the following. -Pb

Identify a balanced reaction for the smelting of SnO2 with carbon.

Which of the following is an example of calcination?

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

Why is zinc used to coat steel objects?

Which of the following is TRUE of powder metallurgy?

Match the following. -Ti

Leaching is ________.

Which compound in the following reaction is the slag? 2Ca3(PO4)2(s) + 6SiO2(s) + 10C(s) P4(g) + 6CaSiO3(l) + 10CO(g)

Which of the following is TRUE concerning substitutional alloys?

Match the following. -Zn

Identify the normal crystal structure at room temperature for Ni.

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 NiCO₃.

Identify a balanced reaction for the smelting of SnO₂ with carbon.

Which compound in the following reaction is the slag? 2Ca₃(PO₄)₂(s) + 6SiO₂(s) + 10C(s) P₄(g) + 6CaSiO₃(l) + 10CO(g)