Question 1

Which one of these metals would normally be obtained by electrolytic reduction?

Accepted Answer

A) aluminum 
B) chromium 
C) copper 
D) iron 
E) zinc 
A) aluminum 
B) chromium 
C) copper 
D) iron 
E) zinc A

Question 2

In the Hall process, ____________ is reduced ____________.

Accepted Answer

A) nickel; electrolytically 
B) aluminum; electrolytically 
C) nickel; by reaction with metallic sodium 
D) aluminum; by reaction with metallic sodium 
E) copper; electrolytically 
A) nickel; electrolytically 
B) aluminum; electrolytically 
C) nickel; by reaction with metallic sodium 
D) aluminum; by reaction with metallic sodium 
E) copper; electrolytically B

Question 3

A naturally occurring substance with a range of chemical composition is

Accepted Answer

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

Question 4

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

Question 5

Basic properties are characteristic of all alkaline earth metal oxides except one. The formula of this exception is

Accepted Answer

A) BeO 
B) MgO 
C) SO2 
D) B2O3 
E) CaO 
A) BeO 
B) MgO 
C) SO2 
D) B2O3 
E) CaO

Question 6

Write the chemical formula of calcite.

Accepted Answer

The answer of Write the chemical formula of calcite....

Question 7

The flotation process used in metallurgy involves

Accepted Answer

A) the roasting of sulfides. 
B) separation of gangue from ore. 
C) electrolytic reduction.. 
D) chemical reduction of a metal. 
E) zone refining. 
A) the roasting of sulfides. 
B) separation of gangue from ore. 
C) electrolytic reduction.. 
D) chemical reduction of a metal. 
E) zone refining.

Question 8

Write two balanced chemical equations for the burning of magnesium in air.

Accepted Answer

2Mg(s)+ O₂

Question 9

Three means used to concentrate ores are flotation, ferromagnetic separation, and amalgamation.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following it not true comparing aluminum to copper?

Accepted Answer

A) Aluminum is cheaper than copper. 
B) Aluminum is lighter than copper. 
C) Aluminum is a better conductor of electricity than copper. 
D) Aluminum is easier to oxidize than copper. 
A) Aluminum is cheaper than copper. 
B) Aluminum is lighter than copper. 
C) Aluminum is a better conductor of electricity than copper. 
D) Aluminum is easier to oxidize than copper.

Question 11

Which of these statements does not describe a property of aluminum?

Accepted Answer

A) Al is an efficient electrical conductor. 
B) Al has a low density compared to other metals. 
C) Al forms an amphoteric hydroxide. 
D) Al is generally considered toxic to humans. 
E) Al has a great affinity for oxygen. 
A) Al is an efficient electrical conductor. 
B) Al has a low density compared to other metals. 
C) Al forms an amphoteric hydroxide. 
D) Al is generally considered toxic to humans. 
E) Al has a great affinity for oxygen.

Question 12

The mineral cryolite, Na3AlF6, is used in the Hall process for aluminum production as

Accepted Answer

A) the source of aluminum (the ore). 
B) a chemical reducing agent. 
C) a material that forms a slag and thus removes impurities. 
D) a solvent for alumina, Al2O3. 
A) the source of aluminum (the ore). 
B) a chemical reducing agent. 
C) a material that forms a slag and thus removes impurities. 
D) a solvent for alumina, Al2O3.

Question 13

Calcium metal is produced by electrolysis of

Accepted Answer

A) CaSO4 
B) CaF2 
C) CaCO3 
D) Ca(OH)2 
E) CaCl2 
A) CaSO4 
B) CaF2 
C) CaCO3 
D) Ca(OH)2 
E) CaCl2

Question 14

Which one of these species is an example of a basic oxide?

Accepted Answer

A) SO3(g) 
B) BaO(s) 
C) Al2O3(s) 
D) Fe2O3(s) 
E) SiO2(s) 
A) SO3(g) 
B) BaO(s) 
C) Al2O3(s) 
D) Fe2O3(s) 
E) SiO2(s)

Question 15

Write the chemical formula of dolomite that provides a source for both magnesium and calcium.

Accepted Answer

CaCO<sub>3

Question 16

Write the chemical formula of pyrite.

Accepted Answer

The answer of Write the chemical formula of pyrite....

Question 17

Aluminum is an active metal, but does not corrode as iron does because

Accepted Answer

A) Al does not react with O2. 
B) a protective layer of Al2O3 forms on the metal surface. 
C) Al is harder to oxidize than is Fe. 
D) the enthalpy of formation of aluminum oxide is negative. 
E) aluminum has a high tensile strength. 
A) Al does not react with O2. 
B) a protective layer of Al2O3 forms on the metal surface. 
C) Al is harder to oxidize than is Fe. 
D) the enthalpy of formation of aluminum oxide is negative. 
E) aluminum has a high tensile strength.

Question 18

All metals are solids at room temperature (25°C)except

Accepted Answer

A) Cs. 
B) Cd. 
C) Ga. 
D) Hg. 
E) Rb. 
A) Cs. 
B) Cd. 
C) Ga. 
D) Hg. 
E) Rb.

Question 19

Which element group includes the most reactive of all the metallic elements?

Accepted Answer

A) alkali metals 
B) alkaline earth metals 
C) coinage metals (Group 1
B)  
D) transition metals 
E) Group 2B metals 
A) alkali metals 
B) alkaline earth metals 
C) coinage metals (Group 1
B)  
D) transition metals 
E) Group 2B metals

Question 20

Write the chemical formula of epsomite (sold in pharmacies as Epsom salts).

Accepted Answer

MgSO<sub>4

Exam 20: Metallurgy and the Chemistry of Metals

Which one of these metals would normally be obtained by electrolytic reduction?

In the Hall process, ____________ is reduced ____________.

A naturally occurring substance with a range of chemical composition is

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

Basic properties are characteristic of all alkaline earth metal oxides except one. The formula of this exception is

Write the chemical formula of calcite.

The flotation process used in metallurgy involves

Write two balanced chemical equations for the burning of magnesium in air.

Three means used to concentrate ores are flotation, ferromagnetic separation, and amalgamation.

Which of the following it not true comparing aluminum to copper?

Which of these statements does not describe a property of aluminum?

The mineral cryolite, Na3AlF6, is used in the Hall process for aluminum production as

Calcium metal is produced by electrolysis of

Which one of these species is an example of a basic oxide?

Write the chemical formula of dolomite that provides a source for both magnesium and calcium.

Write the chemical formula of pyrite.

Aluminum is an active metal, but does not corrode as iron does because

All metals are solids at room temperature (25°C)except

Which element group includes the most reactive of all the metallic elements?

Write the chemical formula of epsomite (sold in pharmacies as Epsom salts).

Chemistry: The Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solution

Gases

Thermo-Chemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Nuclear Chemistry

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

In the Hall process, is reduced .

The mineral cryolite, Na₃AlF₆, is used in the Hall process for aluminum production as