Question 1

What is the name of the process used to separate the minerals from the waste in ore?

Accepted Answer

A)   Gangue
B)   Mining
C)   Fetching
D)   Flotation
E)   Mineral drawingF) D) and E)
G) A) and C)

Question 2

What is the chemical formula for gypsum?

Accepted Answer

A)   CaSO4 • 2H2O
B)   CaF2
C)   MgSO4 • 5H2O
D)   MgSO4 • 7H2O
E)   CaCl2F) All of the above
G) D) and E)

Question 3

What is the major component in limestone?

Accepted Answer

A)   NaNO3
B)   KCl
C)   CaCl
D)   BaSO4
E)   CaCO3F) A) and D)
G) A) and E)

Question 4

What gas is produced at the anode in the Hall process for the electrolytic production of aluminum?

Accepted Answer

The answer of What gas is produced at the anode...

Question 5

According to the band theory, a band is

Accepted Answer

A)   an elastic force that holds electrons close to atoms in an insulator.
B)   the energy gap associated with semiconductors.
C)   a large number of molecular orbitals that are close together in energy.
D)   a large number of atoms in a crystal.E) A) and C)
F) All of the above

Question 6

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

Question 7

Solids containing donor impurities are called ________ - ________ ________.

Accepted Answer

n-type sem...

Question 8

Which is the principal reducing agent in a blast furnace?

Accepted Answer

A)   CaO(s) 
B)   CaSiO3(l) 
C)   CO(g) 
D)   O2(g) 
E)   CO2(g) F) A) and B)
G) A) and C)

Question 9

In a compound, the oxidation number of an alkali metal is always +1.

Accepted Answer

A) True 
 B)False

Question 10

Which undergoes electrolysis to form calcium metal?

Accepted Answer

A)   Ca(OH) 2
B)   Ca(NO3) 2
C)   CaI2
D)   CaF2
E)   CaCl2F) B) and D)
G) A) and B)

Question 11

Explain the method of zone refining.

Accepted Answer

A metal rod containing a few impurities ...

Question 12

What is the chemical formula for limestone?

Accepted Answer

A)   LiOH
B)   Li2CO3
C)   CaCO3
D)   BaCO3
E)   Ca3(PO4) 2F) A) and B)
G) B) and E)

Question 13

What is the chemical formula for cinnabar?

Accepted Answer

A)   HgS
B)   SnBr
C)   SnO2
D)   TiO2
E)   SnBr4F) B) and C)
G) D) and E)

Question 14

What is another name for iron carbide (Fe3C)?

Accepted Answer

Question 15

Cryolite, Na3AlF6, is used in the electrolysis of aluminum oxide because

Accepted Answer

A)   it is a good source of fluoride ions.
B)   it reduces the energy requirement of the process, due to its low melting point.
C)   it provides a source of fluorine, an oxidizing agent.
D)   it provides a source of sodium, a reducing agent.
E)   it is very soluble in water.F) A) and B)
G) A) and C)

Question 16

Why is cryolite, Na3AlF6, mixed with alumina prior to electrolysis in the production of Al?

Accepted Answer

Alumina ac...

Question 17

Basic properties are characteristic of all alkaline earth metal oxides except one. Which is the exception?

Accepted Answer

A)   BeO
B)   MgO
C)   SO2
D)   B2O3
E)   CaOF) B) and C)
G) A) and B)

Exam 24: Nonmetallic Elements and Their Compounds

In a compound, the oxidation number of an alkali metal is always +1.

Correct Answer
verified

What is the chemical formula for limestone?

Correct Answer
verified

Which is the principal reducing agent in a blast furnace?

Correct Answer
verified

Solids containing donor impurities are called - .

Correct Answer
verified
n-type sem...
View Answer

Which undergoes electrolysis to form calcium metal?

Correct Answer
verified

Basic properties are characteristic of all alkaline earth metal oxides except one. Which is the exception?

Correct Answer
verified

Cryolite, Na₃AlF₆, is used in the electrolysis of aluminum oxide because

Correct Answer
verified

What is the chemical formula for gypsum?

Correct Answer
verified

What is the name of the process used to separate the minerals from the waste in ore?

Correct Answer
verified

Why is cryolite, Na₃AlF₆, mixed with alumina prior to electrolysis in the production of Al?

Correct Answer
verified
Alumina ac...
View Answer

What is the chemical formula for cinnabar?

Correct Answer
verified

What is another name for iron carbide (Fe₃C)?

Correct Answer
verified

According to the band theory, a band is

Correct Answer
verified

Explain the method of zone refining.

Correct Answer
verified
A metal rod containing a few impurities ...
View Answer

What gas is produced at the anode in the Hall process for the electrolytic production of aluminum?

Correct Answer
verified

Electrometallurgy uses ________ to separate a metal from its ore.

Correct Answer
verified

What is the major component in limestone?

Correct Answer
verified

Exam 24: Nonmetallic Elements and Their Compounds

In a compound, the oxidation number of an alkali metal is always +1.

Correct AnswerverifiedShow Answer

What is the chemical formula for limestone?

Correct AnswerverifiedShow Answer

Which is the principal reducing agent in a blast furnace?

Correct AnswerverifiedShow Answer

Solids containing donor impurities are called ________ - ________ ________.

Correct Answerverifiedn-type sem...View AnswerShow Answer

Which undergoes electrolysis to form calcium metal?

Correct AnswerverifiedShow Answer

Basic properties are characteristic of all alkaline earth metal oxides except one. Which is the exception?

Correct AnswerverifiedShow Answer

Cryolite, Na3AlF6, is used in the electrolysis of aluminum oxide because

Correct AnswerverifiedShow Answer

What is the chemical formula for gypsum?

Correct AnswerverifiedShow Answer

What is the name of the process used to separate the minerals from the waste in ore?

Correct AnswerverifiedShow Answer

Why is cryolite, Na3AlF6, mixed with alumina prior to electrolysis in the production of Al?

Correct AnswerverifiedAlumina ac...View AnswerShow Answer

What is the chemical formula for cinnabar?

Correct AnswerverifiedShow Answer

What is another name for iron carbide (Fe3C)?

Correct AnswerverifiedShow Answer

According to the band theory, a band is

Correct AnswerverifiedShow Answer

Explain the method of zone refining.

Correct AnswerverifiedA metal rod containing a few impurities ...View AnswerShow Answer

What gas is produced at the anode in the Hall process for the electrolytic production of aluminum?

Correct AnswerverifiedShow Answer

Electrometallurgy uses ________ to separate a metal from its ore.

Correct AnswerverifiedShow Answer

What is the major component in limestone?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Solids containing donor impurities are called - .

Correct Answer
verified
n-type sem...
View Answer

Correct Answer
verified

Correct Answer
verified

Cryolite, Na₃AlF₆, is used in the electrolysis of aluminum oxide because

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Why is cryolite, Na₃AlF₆, mixed with alumina prior to electrolysis in the production of Al?

Correct Answer
verified
Alumina ac...
View Answer

Correct Answer
verified

What is another name for iron carbide (Fe₃C)?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A metal rod containing a few impurities ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
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