Question 1

Magnesium reacts with dilute hydrochloric acid according to which of these equations?

Accepted Answer

A)   Mg + 2HCl → 2H+ + MgCl
B)   Mg + 2HCl → H2 + MgCl2 
C)   Mg + 2HCl → Cl2 + MgH2
D)   Mg + 2HCl → Cl2 + Mg2+ + 2H+E) B) and C)
F) None of the above

Question 2

Aluminum is an active metal, but does not corrode as iron does because

Accepted Answer

A)   Al does not react with O2 .
B)   a protective layer of Al2O3 forms on the metal surface.
C)   Al is harder to oxidize than is Fe.
D)   the enthalpy of formation of aluminum oxide is negative.
E)   aluminum has a high tensile strength.F) A) and D)
G) A) and C)

Question 3

Where on the periodic table are the most reactive metals located?

Accepted Answer

A)   Group IA (alkali metals) 
B)   Group IA (alkaline earth metals) 
C)   Group IIA (alkali metals) 
D)   Group IIA (alkaline earth metals) 
E)   Group VIIA (halogens) F) A) and B)
G) A) and D)

Question 4

Aluminum chloride exists as a dimer.

Accepted Answer

A) True 
 B)False

Question 5

Which mineral is not a silicate?

Accepted Answer

A)   Zircon
B)   Beryl
C)   Smithsonite
D)   Albite
E)   TalcF) None of the above
G) A) and B)

Question 6

What is another name for potassium nitrate?

Accepted Answer

The answer of What is another name for potassium nitrate?...

Question 7

Which one of these normally would not be obtained by chemical reduction?

Accepted Answer

A)   Fe
B)   Ti
C)   Zn
D)   Mg
E)   AgF) C) and D)
G) B) and D)

Question 8

Which is a covalent oxide?

Accepted Answer

A)   CaO
B)   Na2O
C)   Li2O
D)   Cs2O
E)   BeOF) B) and C)
G) A) and D)

Question 9

A(n) ________ is an alloy of mercury with another metal.

Accepted Answer

The answer of A(n) ________ is an alloy of mercury...

Question 10

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

Accepted Answer

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

Question 11

What is the molecular shape of AlF3?

Accepted Answer

A)   Tetrahedral
B)   Linear
C)   Trigonal pyramidal
D)   Square planar
E)   Trigonal planarF) All of the above
G) A) and D)

Question 12

Elements in a group exhibit different properties.

Accepted Answer

A) True 
 B)False

Question 13

The mineral cryolite, Na3AlF6, is used in the Hall process for aluminum production as

Accepted Answer

A)   the source of aluminum (the ore) .
B)   a chemical reducing agent.
C)   a material that forms a slag and thus removes impurities.
D)   a solvent for alumina, Al2O3.E) B) and C)
F) C) and D)

Question 14

The Hall process refers to

Accepted Answer

A)   the production of aluminum by electrolysis.
B)   the recovery of sulfur from underground deposits.
C)   the manufacture of sulfuric acid.
D)   the production of ammonia from nitrogen and hydrogen gases.
E)   the isolation of Al2O3 from bauxite.F) A) and C)
G) B) and D)

Question 15

The ________ process is a fractional distillation process for the purification of nickel.

Accepted Answer

The answer of The ________ process is a fractional distillation...

Question 16

In compounds, what is the oxidation number for the elements in the alkaline earth metal group of the periodic table?

Accepted Answer

The answer of In compounds, what is the oxidation number...

Question 17

Volatile impurities are removed from ores by means of

Accepted Answer

A)   roasting.
B)   amalgamation.
C)   electrolysis.
D)   flotation.
E)   zone refining.F) A) and D)
G) B) and E)

Question 18

What elements are alloyed to make stainless steel?

Accepted Answer

A)   Fe and C
B)   Fe and Mn
C)   Fe and Ni
D)   Fe and Cr
E)   Fe, Cr, and NiF) A) and B)
G) C) and D)

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

Electrolysis is used as the last step in isolating pure ________.

Accepted Answer

A)   iron
B)   boron
C)   aluminum
D)   selenium
E)   carbonF) C) and E)
G) B) and D)

Exam 24: Nonmetallic Elements and Their Compounds

Magnesium reacts with dilute hydrochloric acid according to which of these equations?

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What is the molecular shape of AlF3?

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Aluminum chloride exists as a dimer.

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Aluminum is an active metal, but does not corrode as iron does because

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The Hall process refers to

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Which is a covalent oxide?

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In compounds, what is the oxidation number for the elements in the alkaline earth metal group of the periodic table?

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

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Volatile impurities are removed from ores by means of

Correct AnswerverifiedShow Answer

Which one of these normally would not be obtained by chemical reduction?

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Which mineral is not a silicate?

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A(n) ________ is an alloy of mercury with another metal.

Correct AnswerverifiedShow Answer

What elements are alloyed to make stainless steel?

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Where on the periodic table are the most reactive metals located?

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The mineral cryolite, Na3AlF6, is used in the Hall process for aluminum production as

Correct AnswerverifiedShow Answer

What is another name for potassium nitrate?

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

Correct AnswerverifiedShow Answer

The ________ process is a fractional distillation process for the purification of nickel.

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Elements in a group exhibit different properties.

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Electrolysis is used as the last step in isolating pure ________.

Correct AnswerverifiedShow Answer

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What is the molecular shape of AlF₃?

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The mineral cryolite, Na₃AlF₆, is used in the Hall process for aluminum production as

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