Question 1

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 2

What is an advantage of hydrometallurgical processes over pyrometallurgical processes?

Accepted Answer

Hydrometallurgy generally does

Question 3

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 4

Match the following.

-V

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 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) NiCO3(s)+ SiO2(s)   NiSiO3(s)+ CO2(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) NiCO3(s)+ SiO2(s)   NiSiO3(s)+ CO2(g) 
E) NiCO3(s)+ CO(g)   NiO(s)+ 2CO2(g)

Question 6

Pyrometallurgy is the

Accepted Answer

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

Question 7

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

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 8

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

Question 9

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 10

Which of the following is TRUE of powder metallurgy?

Accepted Answer

A) Machining is required after forming the component. 
B) There is more waste than with casting the molten metal. 
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) There is more waste than with casting the molten metal. 
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 11

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 12

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 13

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 14

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

Accepted Answer

When a substitutional alloy is formed fr

Question 15

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 16

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 17

Match the following.

-Hg

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 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

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 20

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.

Exam 24: Metals and Metallury

Which of the following describes gangue?

What is an advantage of hydrometallurgical processes over pyrometallurgical processes?

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

Match the following. -V

Identify a balanced equation for the calcination of NiCO3.

Pyrometallurgy is the

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

What are the components of bronze?

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

Which of the following is TRUE of powder metallurgy?

Which of the following is an example of smelting?

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

What are the components of brass?

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

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 an example of a hydrometallurgical process?

Match the following. -Hg

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

Calcination is

Smelting is

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.

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

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