Question 1

The Hall process involves the reduction of Al2O3 to aluminum by

Accepted Answer

A) carbon (coke). 
B) carbon monoxide. 
C) molecular hydrogen. 
D) sodium. 
E) electrolysis. 
A) carbon (coke). 
B) carbon monoxide. 
C) molecular hydrogen. 
D) sodium. 
E) electrolysis.

Question 2

According to the band theory, which of these statements provide(s)an explanation for the high electrical conductivity of metals? I.a partly filled conduction band
II.a valence band overlapping an empty conduction band
III.a filled valence band
IV.a large gap between the valence band and the conduction band

Accepted Answer

A) I and II 
B) I and III 
C) III 
D) III and IV 
E) IV 
A) I and II 
B) I and III 
C) III 
D) III and IV 
E) IV

Question 3

Which group of elements 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 4

Mercury, magnesium, and zinc have low enough boiling points that they can be purified by distillation.

Accepted Answer

A) True 
 B)False

Question 5

In the Mond process, nickel is purified by

Accepted Answer

A) dissolving the crude ore in sulfuric acid, and precipitating the nickel(II)ion as the sulfate salt. 
B) dissolving the crude ore in a lye (NaOH)solution, and precipitating the nickel(II)ion as the hydroxide salt. 
C) heating the crude ore to its melting point and electrolytically reducing the nickel(II)ions to form the metal. 
D) passing sodium gas over the crude ore at high temperatures, chemically reducing the nickel(II)to nickel metal. 
E) passing carbon monoxide over the impure metal at high temperature, forming the volatile Ni(CO)4 which is removed as a gas. 
A) dissolving the crude ore in sulfuric acid, and precipitating the nickel(II)ion as the sulfate salt. 
B) dissolving the crude ore in a lye (NaOH)solution, and precipitating the nickel(II)ion as the hydroxide salt. 
C) heating the crude ore to its melting point and electrolytically reducing the nickel(II)ions to form the metal. 
D) passing sodium gas over the crude ore at high temperatures, chemically reducing the nickel(II)to nickel metal. 
E) passing carbon monoxide over the impure metal at high temperature, forming the volatile Ni(CO)4 which is removed as a gas.

Question 6

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 7

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

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

The answer of Write the chemical formula of epsomite (sold...

Question 9

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 hu 
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 hu

Question 10

Which of the following is not a true comparison of 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 elements when doped into silicon would give an n-type semiconductor?

Accepted Answer

A) C 
B) Ga 
C) P 
D) Ge 
E) B 
A) C 
B) Ga 
C) P 
D) Ge 
E) B

Question 12

What are the two raw materials used in the Solvay process?

Accepted Answer

A) NaHCO3 and NaCl 
B) CaCO3 and Na2CO3 
C) NaCl and NaCO3 
D) NH3 and NaCl 
E) Na2CO3 and NH4Cl 
A) NaHCO3 and NaCl 
B) CaCO3 and Na2CO3 
C) NaCl and NaCO3 
D) NH3 and NaCl 
E) Na2CO3 and NH4Cl

Question 13

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

Accepted Answer

A) SiO2(s)$\rarr$ SiO2(g) 
B) SiO2(s)+ CaO(s)$\rarr$CaSiO3(l) 
C) SiO2(s)+ 4HF(g)$\rarr$ SiF4(g)+ 2H2O(g) 
D) SiO2(s)+ C(s)$\rarr$ Si(l)+ CO2(g) 
E) SiO2(s)+ CO(g)$\rarr$ SiCO3(l) 
A) SiO2(s)$\rarr$ SiO2(g) 
B) SiO2(s)+ CaO(s)$\rarr$CaSiO3(l) 
C) SiO2(s)+ 4HF(g)$\rarr$ SiF4(g)+ 2H2O(g) 
D) SiO2(s)+ C(s)$\rarr$ Si(l)+ CO2(g) 
E) SiO2(s)+ CO(g)$\rarr$ SiCO3(l)

Question 14

The valence electron configuration for the alkaline earth metals is represented by which of the following (n = outermost shell)?

Accepted Answer

A) ns1 
B) ns2 
C) ns2 np1 
D) ns2 np2 
E) ns2 np3 
A) ns1 
B) ns2 
C) ns2 np1 
D) ns2 np2 
E) ns2 np3

Question 15

In the production of potassium metal, the source of electrons in the reduction of K+ ions is

Accepted Answer

A) H2(g) 
B) Na(g) 
C) CO(g) 
D) CaO(s) 
E) electrolysis 
A) H2(g) 
B) Na(g) 
C) CO(g) 
D) CaO(s) 
E) electrolysis

Question 16

What effect does increasing temperature have on the conductivities of semiconductors?

Accepted Answer

A) increases 
B) decreases 
C) no change 
D) cannot be predicted 
A) increases 
B) decreases 
C) no change 
D) cannot be predicted

Question 17

Write the chemical formula of corundum.

Accepted Answer

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

Question 18

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

Accepted Answer

A) aluminum 
B) calcium 
C) lithium 
D) sodium 
E) vanadium 
A) aluminum 
B) calcium 
C) lithium 
D) sodium 
E) vanadium

Question 19

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.

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 21: Metallurgy and the Chemistry of Metals

The Hall process involves the reduction of Al2O3 to aluminum by

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

Mercury, magnesium, and zinc have low enough boiling points that they can be purified by distillation.

In the Mond process, nickel is purified by

The flotation process used in metallurgy involves

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

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

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

Which of the following is not a true comparison of aluminum to copper?

Which of these elements when doped into silicon would give an n-type semiconductor?

What are the two raw materials used in the Solvay process?

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

The valence electron configuration for the alkaline earth metals is represented by which of the following (n = outermost shell)?

In the production of potassium metal, the source of electrons in the reduction of K+ ions is

What effect does increasing temperature have on the conductivities of semiconductors?

Write the chemical formula of corundum.

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

A naturally occurring substance with a range of chemical composition is

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

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

The Hall process involves the reduction of Al₂O₃ to aluminum by

In the production of potassium metal, the source of electrons in the reduction of K⁺ ions is