Question 1

Powder metallurgy is

Accepted Answer

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

Question 2

Which of the following is an example of roasting?

Accepted Answer

A)  2 PbS(s) + 3 O2(g)   2 PbO(s) + 2 SO2(g) 
B)  PbO2(s) + 2 C(s)   Pb(l) + 2 CO(g) 
C)  MgCO3(s) + SiO2(s)   MgSiO3(l) + CO2(g) 
D)  MgCO3(s)   MgO(s) + CO2(g) 
E)  MgO(s) + CO(g)   Mg(l) + CO2(g) 
A)  2 PbS(s) + 3 O2(g)   2 PbO(s) + 2 SO2(g) 
B)  PbO2(s) + 2 C(s)   Pb(l) + 2 CO(g) 
C)  MgCO3(s) + SiO2(s)   MgSiO3(l) + CO2(g) 
D)  MgCO3(s)   MgO(s) + CO2(g) 
E)  MgO(s) + CO(g)   Mg(l) + CO2(g)

Question 3

Write 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) + 2 C(s)   Sn(l) + 2 CO(g) 
D)  2 SnO2(s) + 2 CaC2(s)   2 SnC2(s) + 2 CaO(s) + O2(g) 
E)  None of the above represents smelting. 
A)  SnO2(s) + CO2(g)   SnCO3(s) 
B)  SnO2(s) + CaCO3(s)   SnC(s) + CaO(s) + O2(g) 
C)  SnO2(s) + 2 C(s)   Sn(l) + 2 CO(g) 
D)  2 SnO2(s) + 2 CaC2(s)   2 SnC2(s) + 2 CaO(s) + O2(g) 
E)  None of the above represents smelting.

Question 4

Give the highest oxidation number of chromium.

Accepted Answer

A)  -3 
B)  +8 
C)  +5 
D)  +7 
E)  +6 
A)  -3 
B)  +8 
C)  +5 
D)  +7 
E)  +6

Question 5

Identify the metal used in jet engine parts.

Accepted Answer

A)  titanium 
B)  copper 
C)  manganese 
D)  cobalt 
E)  aluminum 
A)  titanium 
B)  copper 
C)  manganese 
D)  cobalt 
E)  aluminum

Question 6

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

Accepted Answer

A)  2 Al(OH)3(s)   Al2O3(s) + 3 H2O(g) 
B)  Al(OH)3(s) + SiO2(s)   AlSiO3(s) + 3 H2O(g) 
C)  2 Al(OH)3(s) + O2(g)   Al2O3(s) + 3 H2O(g) 
D)  Al(OH)3(s) + C(s)   Al2O3(s) + CO2(g) + H2O(g) 
E)  None of the above represents calcination. 
A)  2 Al(OH)3(s)   Al2O3(s) + 3 H2O(g) 
B)  Al(OH)3(s) + SiO2(s)   AlSiO3(s) + 3 H2O(g) 
C)  2 Al(OH)3(s) + O2(g)   Al2O3(s) + 3 H2O(g) 
D)  Al(OH)3(s) + C(s)   Al2O3(s) + CO2(g) + H2O(g) 
E)  None of the above represents calcination.

Question 7

Which of the following describes flux?

Accepted Answer

A)  a waste material that is the product of smelting a metal ore 
B)  an 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)  None of the above describes flux. 
A)  a waste material that is the product of smelting a metal ore 
B)  an 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)  None of the above describes flux.

Question 8

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)  None of the above can be determined from the information given. 
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)  None of the above can be determined from the information given.

Question 9

Which of the following is an example of an electrometallurgy process?

Accepted Answer

A)  Al(OH)3(s) + SiO2(s)   AlSiO3(s) + 3 H2O(g) 
B)  Zn(OH)2(s)   ZnO(s) + H2O(g) 
C)  2 Al(OH)3(s)   Al2O3(s) + 3 H2O(g) 
D)  PbSO4∙5H2O(s) + H2O(l) → PbS(s) + H2SO4(aq) + 5 OH⁻(aq) 
E)  Al2O3∙nH2O(s) + 2 OH⁻(aq) + 2 H2O(l) → 2 Al(OH)4⁻(aq) 
A)  Al(OH)3(s) + SiO2(s)   AlSiO3(s) + 3 H2O(g) 
B)  Zn(OH)2(s)   ZnO(s) + H2O(g) 
C)  2 Al(OH)3(s)   Al2O3(s) + 3 H2O(g) 
D)  PbSO4∙5H2O(s) + H2O(l) → PbS(s) + H2SO4(aq) + 5 OH⁻(aq) 
E)  Al2O3∙nH2O(s) + 2 OH⁻(aq) + 2 H2O(l) → 2 Al(OH)4⁻(aq)

Question 10

Identify the substances which 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 11

Give the components of bronze.

Accepted Answer

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

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)  M4N 
D)  M2N 
E)  MN4 
A)  MN 
B)  MN2 
C)  M4N 
D)  M2N 
E)  MN4

Question 13

Which of the following is NOT generally a property of a metal?

Accepted Answer

A)  poor electrical conductor 
B)  good thermal conductor 
C)  low resistivity 
D)  ductile 
E)  opaque 
A)  poor electrical conductor 
B)  good thermal conductor 
C)  low resistivity 
D)  ductile 
E)  opaque

Question 14

Identify the element with the highest thermal conductivity.

Accepted Answer

A)  copper 
B)  vanadium 
C)  silver 
D)  iron 
A)  copper 
B)  vanadium 
C)  silver 
D)  iron

Question 15

Which of the following is an example of calcination?

Accepted Answer

A)  2 PbS(s) + 3 O2(g)   2 PbO(s) + 2 SO2(g) 
B)  PbO2(s) + 2 C(s)   Pb(l) + 2 CO(g) 
C)  MgCO3(s) + SiO2(s)   MgSiO3(l) + CO2(g) 
D)  MgCO3(s)   MgO(s) + CO2(g) 
E)  MgO(s) + CO(g)   Mg(l) + CO2(g) 
A)  2 PbS(s) + 3 O2(g)   2 PbO(s) + 2 SO2(g) 
B)  PbO2(s) + 2 C(s)   Pb(l) + 2 CO(g) 
C)  MgCO3(s) + SiO2(s)   MgSiO3(l) + CO2(g) 
D)  MgCO3(s)   MgO(s) + CO2(g) 
E)  MgO(s) + CO(g)   Mg(l) + CO2(g)

Question 16

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)  None of the above is true. 
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)  None of the above is true.

Question 17

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)  None of the above can be determined from the information given. 
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)  None of the above can be determined from the information given.

Question 18

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)  None of the above describes gangue. 
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)  None of the above describes gangue.

Question 19

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)  None of the above is true. 
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)  None of the above is true.

Question 20

Chromate,CrO4-,has a(n)________ shape.

Accepted Answer

A)  octahedral 
B)  trigonal bipyramidal 
C)  trigonal pyramidal 
D)  tetrahedral 
E)  square 
A)  octahedral 
B)  trigonal bipyramidal 
C)  trigonal pyramidal 
D)  tetrahedral 
E)  square

Exam 24: Metals and Metallurgy

Powder metallurgy is

Which of the following is an example of roasting?

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

Give the highest oxidation number of chromium.

Identify the metal used in jet engine parts.

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

Which of the following describes flux?

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

Which of the following is an example of an electrometallurgy process?

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

Give the components of bronze.

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 is NOT generally a property of a metal?

Identify the element with the highest thermal conductivity.

Which of the following is an example of calcination?

Which of the following is TRUE concerning substitutional alloys?

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

Which of the following describes gangue?

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

Chromate,CrO4-,has a(n)________ shape.

Matter, measurement, and Problem Solving

Atoms and Elements

Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

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,

Liquids,solids,and Intermolecular Forces

Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Compounds

Filters

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

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

Chromate,CrO₄^-,has a(n)________ shape.