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; electrolyticallyF) C) and D)
G) A) and B)

Question 2

Which of these ions is most likely to substitute for Ca2+ in the human body?

Accepted Answer

A)   Cl-
B)   Sr2+
C)   K+
D)   S2-
E)   Pb2+F) D) and E)
G) All of the above

Question 3

Seawater is a good source of which of the following metals?

Accepted Answer

A)   Cu
B)   Au
C)   Mg
D)   Cl
E)   CaF) C) and D)
G) C) and E)

Question 4

A mineral deposit concentrated enough to allow economical recovery of a desired metal is known as ________.

Accepted Answer

The answer of A mineral deposit concentrated enough to allow...

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

Beryllium, the first element in Group 2A, is the most metallic element in the group.

Accepted Answer

A) True 
 B)False

Question 7

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 C)
G) None of the above

Question 8

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) A) and B)
G) B) and D)

Question 9

Which diagram best corresponds to the energy level diagram of a semiconductor?

Accepted Answer

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

Question 10

The process used to produce metals with a purity of more than 99.99% is called

Accepted Answer

A)   zone refining.
B)   electrorefining.
C)   distillation.
D)   sublimation.
E)   alloying.F) A) and B)
G) B) and E)

Question 11

What is the chemical formula for phosphate rock?

Accepted Answer

A)   Na3PO4
B)   Na3P
C)   Mg3(PO4) 2
D)   AlPO4
E)   Ca3(PO4) 2F) A) and B)
G) D) and E)

Question 12

Alloying a metal is done to

Accepted Answer

A)   make its extraction from its ore easier.
B)   convert the metal to an oxide.
C)   disguise the true identity of the metal.
D)   prepare ultrapure metal samples.
E)   enhance properties, like conductivity.F) A) and B)
G) B) and E)

Question 13

Which reaction is a good small-scale laboratory method for the preparation of hydrogen?

Accepted Answer

A)   CH4(g)  + H2O(g)  → CO(g)  + 3H2(g) 
B)   3FeCl2(s)  + 4H2O(g)  → Fe3O4(s)  + 6HCl(g)  + H2(g) 
C)   NaH(s)  + H2O(l)  → NaOH(aq)  + H2(g) 
D)   CO(g)  + H2O(g)  → CO2(g)  + H2(g) 
E)   None of these methods is useful.F) C) and D)
G) None of the above

Question 14

What metallurgical process is used to obtain aluminum metal?

Accepted Answer

Electrolytic reducti...

Question 15

In gunpowder, which component is present in the highest percent by mass?

Accepted Answer

A)   Wood charcoal
B)   Chile salt peter
C)   Potassium nitrate
D)   Sulfur
E)   AmmoniaF) B) and C)
G) A) and B)

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

Question 17

The first step in the purification of a metal M is represented by the following figure. To which process does the figure correspond, and which metal is usually purified by this process?

Accepted Answer

A)   The Mond process, for the purification of Zn
B)   The Mond process, for the purification of Ni
C)   The Hall process, for the purification of Al
D)   The Hall process, for the purification of Cr
E)   The zone refining process, for the purification of FeF) B) and D)
G) A) and C)

Question 18

The following electrolytic cell is a representation of the process used to purify copper metal. How does it work?

Accepted Answer

A)   Impure copper is oxidized at the anode, and pure copper is reduced at the cathode. Impurities dissolve into solution.
B)   Impure copper is oxidized at the cathode, and pure copper is reduced at the anode. Impurities dissolve into solution.
C)   Impure copper is oxidized at the anode, and pure copper dissolves into solution. Impurities remain on the cathode.
D)   Impure copper is oxidized at the cathode, and pure copper dissolves into solution. Impurities remain on the anode.
E)   Impure copper precipitates from solution onto the cathode, and pure copper remains on the anode.F) B) and C)
G) A) and D)

Question 19

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 D)
G) B) and E)

Question 20

What is the science and technology of separating metals from their ores and of compounding alloys?

Accepted Answer

The answer of What is the science and technology of...

Exam 24: Nonmetallic Elements and Their Compounds

The first step in the purification of a metal M is represented by the following figure. To which process does the figure correspond, and which metal is usually purified by this process?

Correct AnswerverifiedShow Answer

A mineral deposit concentrated enough to allow economical recovery of a desired metal is known as ________.

Correct AnswerverifiedShow Answer

The process used to produce metals with a purity of more than 99.99% is called

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Seawater is a good source of which of the following metals?

Correct AnswerverifiedShow Answer

In gunpowder, which component is present in the highest percent by mass?

Correct AnswerverifiedShow Answer

Which of these ions is most likely to substitute for Ca2+ in the human body?

Correct AnswerverifiedShow Answer

Which reaction is a good small-scale laboratory method for the preparation of hydrogen?

Correct AnswerverifiedShow Answer

Beryllium, the first element in Group 2A, is the most metallic element in the group.

Correct AnswerverifiedShow Answer

In the Hall process, ________ is reduced ________.

Correct AnswerverifiedShow Answer

Alloying a metal is done to

Correct AnswerverifiedShow Answer

Which diagram best corresponds to the energy level diagram of a semiconductor?

Correct AnswerverifiedShow Answer

What is the chemical formula for phosphate rock?

Correct AnswerverifiedShow Answer

The Hall process involves the reduction of Al2O3 to aluminum by

Correct AnswerverifiedShow Answer

What is the science and technology of separating metals from their ores and of compounding alloys?

Correct AnswerverifiedShow Answer

The following electrolytic cell is a representation of the process used to purify copper metal. How does it work?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Nickel is often purified using

Correct AnswerverifiedShow Answer

What metallurgical process is used to obtain aluminum metal?

Correct AnswerverifiedElectrolytic reducti...View AnswerShow Answer

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Which of these ions is most likely to substitute for Ca²⁺ in the human body?

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In the Hall process, is reduced .

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The Hall process involves the reduction of Al₂O₃ to aluminum by

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Electrolytic reducti...
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