Question 1

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 huE) All of the above
F) C) and D)

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)  IVF) A) and D)
G) C) and D)

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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.E) A) and B)
F) A) and C)

Question 5

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 metalsF) A) and D)
G) D) and E)

Question 6

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

Accepted Answer

A)  aluminum
B)  calcium
C)  lithium
D)  sodium
E)  vanadiumF) A) and C)
G) A) and B)

Question 7

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.F) A) and C)
G) D) and E)

Question 8

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

Accepted Answer

A)  increases
B)  decreases
C)  no change
D)  cannot be predictedE) B) and C)
F) A) and B)

Question 9

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.F) None of the above
G) C) and E)

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

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.F) C) and D)
G) D) and E)

Question 13

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)  BF) All of the above
G) D) and E)

Question 14

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)  F) C) and D)
G) B) and C)

Question 15

Write the chemical formula of corundum.

Accepted Answer

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

Question 16

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.F) D) and E)
G) C) and D)

Question 17

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 NH4ClF) D) and E)
G) A) and C)

Question 18

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 np3F) B) and E)
G) C) and D)

Question 19

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 20

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)  electrolysisF) C) and D)
G) A) and B)

Exam 21: Metallurgy and the Chemistry of Metals

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

The flotation process used in metallurgy involves

Correct Answer
verified

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

Correct Answer
verified

Write the chemical formula of corundum.

Correct Answer
verified

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

Correct Answer
verified

In the Mond process, nickel is purified by

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

A naturally occurring substance with a range of chemical composition is

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

The Hall process involves the reduction of Al₂O₃ to aluminum by

Correct Answer
verified

Exam 21: Metallurgy and the Chemistry of Metals

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The flotation process used in metallurgy involves

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Write the chemical formula of corundum.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In the Mond process, nickel is purified by

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A naturally occurring substance with a range of chemical composition is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The Hall process involves the reduction of Al2O3 to aluminum by

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The Hall process involves the reduction of Al₂O₃ to aluminum by

Correct Answer
verified