Question 1

The debris accompanying a mineral is called

Accepted Answer

A)  slag.
B)  gangue.
C)  ore.
D)  halite.
E)  ash.F) A) and B)
G) C) and D)

Question 2

Which metal's commercial source is seawater?

Accepted Answer

A)  Cs
B)  K
C)  Mg
D)  Ba
E)  LiF) B) and C)
G) A) and E)

Question 3

The most common source for the commercial production of aluminum is called

Accepted Answer

A)  aluminite.
B)  hematite.
C)  galena.
D)  cinnabar.
E)  bauxite.F) B) and E)
G) C) and D)

Question 4

A(n)__________ is a solid solution either of two or more metals,or of a metal or metals with one or more nonmetals.

Accepted Answer

The answer of A(n)__________ is a solid solution either of...

Question 5

What is the name of the metallurgical process performed at high temperatures?

Accepted Answer

The answer of What is the name of the metallurgical...

Question 6

The final step of the purification of copper involves electrorefining in which copper is separated from nickel and iron by being reduced at the cathode of a cell.Why are nickel and iron not reduced?

Accepted Answer

A)  Their reduction potentials are more positive than copper's.
B)  Their reduction potentials are more negative than copper's.
C)  They cannot be deposited on a copper electrode.
D)  Their reduction potentials are more negative than water's.
E)  Their reduction requires large overvoltages.F) A) and D)
G) C) and D)

Question 7

Which ion is not found in sea water in a concentration high enough to be an industrial source of the metal?

Accepted Answer

A)  Ca2+
B)  Mg2+
C)  Na+
D)  K+
E)  Ag+F) A) and B)
G) C) and D)

Question 8

Which two compounds are produced by the Solvay process?

Accepted Answer

A)  CaCO3 and CaO
B)  CaCO3 and Na2CO3
C)  NaHCO3 and NaCl
D)  NH3 and NH4Cl
E)  NaHCO3 and Na2CO3F) A) and B)
G) A) and C)

Question 9

Cryolite,Na3AlF6,is used in the electrolysis of aluminum oxide because

Accepted Answer

A)  it is a good source of fluoride ions.
B)  it reduces the energy requirement of the process,due to its low melting point.
C)  it provides a source of fluorine,an oxidizing agent.
D)  it provides a source of sodium,a reducing agent.
E)  it is very soluble in water.F) A) and B)
G) A) and C)

Question 10

Nickel is often purified using

Accepted Answer

A)  amalgamation.
B)  the Hall process.
C)  the Mond process.
D)  pressurization.
E)  a blast furnace.F) B) and C)
G) C) and E)

Question 11

Potassium is produced industrially by the reaction
Na(g)+ KCl(l)  NaCl(l)+ K(g)

Accepted Answer

The reaction is carried out at 850°C,but...

Question 12

Cast iron as it is prepared in a blast furnace is a product of high purity.

Accepted Answer

A) True 
 B)False

Question 13

Group 1A elements are called alkaline earth metals.

Accepted Answer

A) True 
 B)False

Question 14

Which of these reactions represents the removal of silica from iron ore in a blast furnace?

Accepted Answer

A)  SiO2(s) → SiO2(g) 
B)  SiO2(s) + CaO(s) → CaSiO3(l) 
C)  SiO2(s) + 4HF(g) → SiF4(g) + 2H2O(g) 
D)  SiO2(s) + C(s) → Si(l) + CO2(g) 
E)  SiO2(s) + CO(g) → SiCO3(l) F) B) and D)
G) C) and E)

Question 15

The naturally occurring form of a metal that is concentrated enough to allow economical recovery of the metal is know as

Accepted Answer

A)  an element.
B)  a mineral.
C)  gangue.
D)  an ore.
E)  an amalgam.F) C) and E)
G) B) and C)

Question 16

In the production of aluminum,bauxite is heated with sodium hydroxide solution to _____.

Accepted Answer

A)  remove titanium(IV) oxide
B)  remove silica
C)  remove iron oxides
D)  remove potassium
E)  remove fluoridesF) B) and E)
G) C) and D)

Question 17

According to the band theory,a band is

Accepted Answer

A)  an elastic force that holds electrons close to atoms in an insulator.
B)  the energy gap associated with semiconductors.
C)  a large number of molecular orbitals that are close together in energy.
D)  a large number of atoms in a crystal.E) B) and D)
F) All of the above

Question 18

Which is NOT a chemical reaction that occurs in a blast furnace in the production of iron?

Accepted Answer

A)  CaCO3(s) → CaO(s) + CO2(g) 
B)  3Fe2O3(s) + CO(g) → 2Fe3O4(s) + CO2(g) 
C)  2FeO(s) + CO(g) → Fe2O3(s) + C(s) 
D)  Fe3O4(s) + CO(g) → 3FeO(s) + CO2(g) 
E)  FeO(s) + CO(g) → Fe(l) + CO2(g) F) All of the above
G) A) and B)

Question 19

What is another name for potassium nitrate?

Accepted Answer

The answer of What is another name for potassium nitrate?...

Question 20

What is the source of most metals?

Accepted Answer

A)  Industry
B)  Synthesis
C)  Saturated
D)  Ocean floor
E)  MineralsF) A) and E)
G) C) and D)

Exam 23: Metallurgy and the Chemistry of Metals

According to the band theory,a band is

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Cryolite,Na3AlF6,is used in the electrolysis of aluminum oxide because

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Which metal's commercial source is seawater?

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Potassium is produced industrially by the reaction Na(g)+ KCl(l) NaCl(l)+ K(g)

Correct AnswerverifiedThe reaction is carried out at 850°C,but...View AnswerShow Answer

Which is NOT a chemical reaction that occurs in a blast furnace in the production of iron?

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The most common source for the commercial production of aluminum is called

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What is another name for potassium nitrate?

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Group 1A elements are called alkaline earth metals.

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The naturally occurring form of a metal that is concentrated enough to allow economical recovery of the metal is know as

Correct AnswerverifiedShow Answer

A(n)__________ is a solid solution either of two or more metals,or of a metal or metals with one or more nonmetals.

Correct AnswerverifiedShow Answer

Which two compounds are produced by the Solvay process?

Correct AnswerverifiedShow Answer

The debris accompanying a mineral is called

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Cast iron as it is prepared in a blast furnace is a product of high purity.

Correct AnswerverifiedShow Answer

What is the name of the metallurgical process performed at high temperatures?

Correct AnswerverifiedShow Answer

The final step of the purification of copper involves electrorefining in which copper is separated from nickel and iron by being reduced at the cathode of a cell.Why are nickel and iron not reduced?

Correct AnswerverifiedShow Answer

In the production of aluminum,bauxite is heated with sodium hydroxide solution to _____.

Correct AnswerverifiedShow Answer

What is the source of most metals?

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Which ion is not found in sea water in a concentration high enough to be an industrial source of the metal?

Correct AnswerverifiedShow Answer

Nickel is often purified using

Correct AnswerverifiedShow Answer

Which of these reactions represents the removal of silica from iron ore in a blast furnace?

Correct AnswerverifiedShow Answer

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Cryolite,Na₃AlF₆,is used in the electrolysis of aluminum oxide because

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The reaction is carried out at 850°C,but...
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