Question 1

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

Question 2

Argentite, chalcocite and cinnabar are all examples of what type of mineral?

Accepted Answer

A) carbonates 
B) oxides 
C) halides 
D) phosphates 
E) sulfides 
A) carbonates 
B) oxides 
C) halides 
D) phosphates 
E) sulfides

Question 3

Write the chemical formula of magnetite.

Accepted Answer

Fe₃O₄ (accep

Question 4

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 5

Write a balanced chemical equation illustrating the thermite reaction.

Accepted Answer

2Al(s)+ Fe

Question 6

Write a balanced chemical equation illustrating the decomposition of chile saltpeter to form sodium nitrite and oxygen gas.

Accepted Answer

2NaNO₃(s)@#LAT-DLM&2N

Question 7

Aluminum hydroxide, Al(OH)3, is

Accepted Answer

A) an acid. 
B) an amphoteric hydroxide. 
C) a base. 
D) an explosive hydroxide. 
E) used to make amalgams. 
A) an acid. 
B) an amphoteric hydroxide. 
C) a base. 
D) an explosive hydroxide. 
E) used to make amalgams.

Question 8

Alloys of iron that contain 1.0-1.5% carbon and some manganese, phosphorus, silicon, and sulfur are called

Accepted Answer

A) steel. 
B) cast iron. 
C) coke. 
D) pig iron. 
E) hematite. 
A) steel. 
B) cast iron. 
C) coke. 
D) pig iron. 
E) hematite.

Question 9

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 10

The alkali metals listed in order of increasing melting point is consistent with which of the following?

Accepted Answer

A) Li < Na < K < Rb < Cs 
B) Cs < Rb < K < Na < Li 
C) Be < Mg < Ca < Sr < Ba 
D) Ba < Sr < Ca < Mg < Be 
A) Li < Na < K < Rb < Cs 
B) Cs < Rb < K < Na < Li 
C) Be < Mg < Ca < Sr < Ba 
D) Ba < Sr < Ca < Mg < Be

Question 11

Barite, anglesite, and epsomite are all examples of what type of mineral?

Accepted Answer

A) carbonates 
B) oxides 
C) sulfides 
D) sulfates 
E) silicates 
A) carbonates 
B) oxides 
C) sulfides 
D) sulfates 
E) silicates

Question 12

Which of the following diagrams represents an insulator?

Accepted Answer

A) A 
B) B 
C) C 
A) A 
B) B 
C) C

Question 13

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

Accepted Answer

The answer of Write the chemical formula of dolomite that...

Question 14

Write a balanced chemical equation illustrating roasting.

Accepted Answer

2ZnS + 3O₂ @#LAT-DLM& 2ZnO + 2S

Question 15

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. 
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.

Question 16

Why is cryolite, Na3AlF6, mixed with alumina prior to electrolysis in the production of Al?

Accepted Answer

It acts is

Question 17

What is the total number of moles (n)of electrons exchanged between the oxidizing agent and the reducing agent in the reaction below to obtain vanadium metal: V2O5(s)+ 5Ca(l)$\rarr$ 2V(l)+ 5CaO(s)

Accepted Answer

A) 1 
B) 2 
C) 5 
D) 10 
E) 0 
A) 1 
B) 2 
C) 5 
D) 10 
E) 0

Question 18

The following reaction is used to produce chromium metal at high temperature.
Cr2O3(s)+ 2Al(s)$\rarr$ 2Cr(l)+ Al2O3(s)
Which element is oxidized and which is reduced?

Accepted Answer

chromium is reduced

Question 19

Metallic sodium is obtained commercially from molten sodium chloride by

Accepted Answer

A) chemical reduction with magnesium. 
B) flotation. 
C) electrolysis. 
D) zone refining. 
E) roasting. 
A) chemical reduction with magnesium. 
B) flotation. 
C) electrolysis. 
D) zone refining. 
E) roasting.

Question 20

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.

Exam 21: Metallurgy and the Chemistry of Metals

In the Hall process, ____________ is reduced ____________.

Argentite, chalcocite and cinnabar are all examples of what type of mineral?

Write the chemical formula of magnetite.

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

Write a balanced chemical equation illustrating the thermite reaction.

Write a balanced chemical equation illustrating the decomposition of chile saltpeter to form sodium nitrite and oxygen gas.

Aluminum hydroxide, Al(OH)3, is

Alloys of iron that contain 1.0-1.5% carbon and some manganese, phosphorus, silicon, and sulfur are called

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

The alkali metals listed in order of increasing melting point is consistent with which of the following?

Barite, anglesite, and epsomite are all examples of what type of mineral?

Which of the following diagrams represents an insulator?

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

Write a balanced chemical equation illustrating roasting.

According to the band theory, a band is

Why is cryolite, Na3AlF6, mixed with alumina prior to electrolysis in the production of Al?

What is the total number of moles (n)of electrons exchanged between the oxidizing agent and the reducing agent in the reaction below to obtain vanadium metal: V2O5(s)+ 5Ca(l) →\rarr→ 2V(l)+ 5CaO(s)

The following reaction is used to produce chromium metal at high temperature. Cr2O3(s)+ 2Al(s) →\rarr→ 2Cr(l)+ Al2O3(s) Which element is oxidized and which is reduced?

Metallic sodium is obtained commercially from molten sodium chloride by

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

Chemistry: the Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

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

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

In the Hall process, is reduced .

Aluminum hydroxide, Al(OH)₃, is

Why is cryolite, Na₃AlF₆, mixed with alumina prior to electrolysis in the production of Al?

What is the total number of moles (n)of electrons exchanged between the oxidizing agent and the reducing agent in the reaction below to obtain vanadium metal: V₂O₅(s)+ 5Ca(l) $\rarr$ 2V(l)+ 5CaO(s)

The following reaction is used to produce chromium metal at high temperature. Cr₂O₃(s)+ 2Al(s) $\rarr$ 2Cr(l)+ Al₂O₃(s) Which element is oxidized and which is reduced?

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