Question 1

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 C)
G) All of the above C

Question 2

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 E)
G) None of the above

Question 3

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) B) and E)
G) A) and E)

Question 4

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

Accepted Answer

A) True 
 B)False

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 oxidized in this reaction?

Accepted Answer

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

Question 7

________ is the metallurgy procedure carried out at high temperature.

Accepted Answer

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

Question 8

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 D)
F) A) and B)

Question 9

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 10

Which mineral is a silicate?

Accepted Answer

A)   Cinnabar
B)   Corundum
C)   Smithsonite
D)   Hydroxyapatite
E)   TalcF) All of the above
G) A) and C)

Question 11

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) None of the above
G) A) and E)

Question 12

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

Accepted Answer

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

Question 13

Which metal's commercial source is seawater?

Accepted Answer

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

Question 14

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

Question 15

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 16

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) C) and D)

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) A) and B)
G) None of the above

Question 18

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) B) and E)
G) A) and E)

Question 19

Which mineral is not a carbonate?

Accepted Answer

A)   Witherite
B)   Sylvite
C)   Smithsonite
D)   Cerussite
E)   CalciteF) All of the above
G) A) and B)

Question 20

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) A) and B)
F) A) and C)

Exam 24: Nonmetallic Elements and Their Compounds

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

Correct AnswerverifiedC

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

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

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

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 oxidized in this reaction?

Correct AnswerverifiedShow Answer

________ is the metallurgy procedure carried out at high temperature.

Correct AnswerverifiedShow Answer

Which statement is not correct?

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

Which mineral is a silicate?

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

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

Correct AnswerverifiedShow Answer

Which metal's commercial source is seawater?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedE

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

Correct AnswerverifiedShow Answer

Hydrometallurgy uses ________ to separate a metal from its ore.

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

Which statement is not correct?

Correct AnswerverifiedShow Answer

Which mineral is not a carbonate?

Correct AnswerverifiedShow Answer

In n-type semiconductors

Correct AnswerverifiedShow Answer

Correct Answer
verified
C

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

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Aluminum

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified