Question 1

Hydrometallurgy uses ________ to separate a metal from its ore.

Accepted Answer

A)   solid phase chemical properties
B)   electrical processes
C)   thermal processes
D)   aqueous chemical processes
E)   molten salt processesF) B) and E)
G) A) and B)

Question 2

In n-type semiconductors

Accepted Answer

A)   the energy gap between the valence band and the conduction band is very large.
B)   impurities that donate electrons are added to provide conduction electrons.
C)   a valence band overlaps the empty conduction band.
D)   impurities that provide "positive holes" are added to a pure semiconductor.E) C) and D)
F) All of the above

Question 3

The most common source for the commercial production of aluminum is called

Accepted Answer

A)   aluminite.
B)   hematite.
C)   galena.
D)   cinnabar.
E)   bauxite.F) A) and E)
G) D) and E) E

Question 4

Which statement is not correct?

Accepted Answer

A)   Aluminum has a low density versus other metals.
B)   Al(OH) 3 is an amphoteric compound.
C)   Metallic aluminum is toxic to humans.
D)   Aluminum is very reactive with oxygen.
E)   Metallic aluminum conducts electricity.F) C) and E)
G) None of the above

Question 5

Group 1A elements are called alkaline earth metals.

Accepted Answer

A) True 
 B)False

Question 6

Aluminum chloride reacts with manganese metal to form aluminum metal and manganese(II) chloride. Which substance is reduced in this reaction?

Accepted Answer

Aluminum

Question 7

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

Question 8

________ is the metallurgy procedure carried out at high temperature.

Accepted Answer

The answer of ________ is the metallurgy procedure carried out...

Question 9

Most metals come from ________, which are naturally occurring substances with a range of chemical compositions.

Accepted Answer

The answer of Most metals come from ________, which are...

Question 10

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

Question 11

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

Accepted Answer

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

Question 12

Aluminum chloride reacts with manganese metal to form aluminum metal and manganese(II) chloride. Which substance is oxidized in this reaction?

Accepted Answer

The answer of Aluminum chloride reacts with manganese metal to...

Question 13

Which is NOT a chemical reaction that occurs in a blast furnace in the production of iron?

Accepted Answer

A)   CaCO3(s)  → CaO(s)  + CO2(g) 
B)   3Fe2O3(s)  + CO(g)  → 2Fe3O4(s)  + CO2(g) 
C)   2FeO(s)  + CO(g)  → Fe2O3(s)  + C(s) 
D)   Fe3O4(s)  + CO(g)  → 3FeO(s)  + CO2(g) 
E)   FeO(s)  + CO(g)  → Fe(l)  + CO2(g) F) A) and B)
G) A) and C) C

Question 14

What type of metal is generally separated using a strong electromagnet?

Accepted Answer

A)   ferromagnetic
B)   oxide
C)   alkaline
D)   uncombinedE) B) and C)
F) B) and D)

Question 15

Which metal's commercial source is seawater?

Accepted Answer

A)   Cs
B)   K
C)   Mg
D)   Ba
E)   LiF) B) and C)
G) C) and D)

Question 16

Which statement is not correct?

Accepted Answer

A)   Aluminum hydroxide can act as a Lewis acid.
B)   Aluminum hydroxide can act as a base.
C)   Aluminum hydroxide is amphoteric.
D)   Aluminum hydroxide can ONLY act as a base.E) A) and B)
F) A) and C)

Question 17

The final step of the purification of copper involves electrorefining in which copper is separated from nickel and iron by being reduced at the cathode of a cell. Why are nickel and iron not reduced?

Accepted Answer

A)   Their reduction potentials are more positive than copper's.
B)   Their reduction potentials are more negative than copper's.
C)   They cannot be deposited on a copper electrode.
D)   Their reduction potentials are more negative than water's.
E)   Their reduction requires large overvoltages.F) All of the above
G) A) and B)

Question 18

Bauxite (Al2O3 • 2H2O) ore is the commercial source of aluminum metal.

Accepted Answer

A) True 
 B)False

Question 19

Which mineral is a silicate?

Accepted Answer

A)   Cinnabar
B)   Corundum
C)   Smithsonite
D)   Hydroxyapatite
E)   TalcF) B) and D)
G) A) and B)

Question 20

Which mineral is not a carbonate?

Accepted Answer

A)   Witherite
B)   Sylvite
C)   Smithsonite
D)   Cerussite
E)   CalciteF) A) and B)
G) A) and C)

Exam 24: Nonmetallic Elements and Their Compounds

Hydrometallurgy uses ________ to separate a metal from its ore.

Correct AnswerverifiedShow Answer

In n-type semiconductors

Correct AnswerverifiedShow Answer

The most common source for the commercial production of aluminum is called

Correct AnswerverifiedE

Which statement is not correct?

Correct AnswerverifiedShow Answer

Group 1A elements are called alkaline earth metals.

Correct AnswerverifiedShow Answer

Aluminum chloride reacts with manganese metal to form aluminum metal and manganese(II) chloride. Which substance is reduced in this reaction?

Correct AnswerverifiedAluminum

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

Correct AnswerverifiedShow Answer

________ is the metallurgy procedure carried out at high temperature.

Correct AnswerverifiedShow Answer

Most metals come from ________, which are naturally occurring substances with a range of chemical compositions.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Aluminum chloride reacts with manganese metal to form aluminum metal and manganese(II) chloride. Which substance is oxidized in this reaction?

Correct AnswerverifiedShow Answer

Which is NOT a chemical reaction that occurs in a blast furnace in the production of iron?

Correct AnswerverifiedC

What type of metal is generally separated using a strong electromagnet?

Correct AnswerverifiedShow Answer

Which metal's commercial source is seawater?

Correct AnswerverifiedShow Answer

Which statement is not correct?

Correct AnswerverifiedShow Answer

The final step of the purification of copper involves electrorefining in which copper is separated from nickel and iron by being reduced at the cathode of a cell. Why are nickel and iron not reduced?

Correct AnswerverifiedShow Answer

Bauxite (Al2O3 • 2H2O) ore is the commercial source of aluminum metal.

Correct AnswerverifiedShow Answer

Which mineral is a silicate?

Correct AnswerverifiedShow Answer

Which mineral is not a carbonate?

Correct AnswerverifiedShow Answer

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E

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Aluminum

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

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C

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Bauxite (Al₂O₃• 2H₂O) ore is the commercial source of aluminum metal.

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