Question 1

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. 
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.

Question 2

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 3

Aluminum chloride exists as a dimer.

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

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

Question 6

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

Accepted Answer

A)  iron 
B)  boron 
C)  aluminum 
D)  selenium 
E)  carbon 
A)  iron 
B)  boron 
C)  aluminum 
D)  selenium 
E)  carbon

Question 7

Which is a covalent oxide?

Accepted Answer

A)  CaO 
B)  Na2O 
C)  Li2O 
D)  Cs2O 
E)  BeO 
A)  CaO 
B)  Na2O 
C)  Li2O 
D)  Cs2O 
E)  BeO

Question 8

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+ 
A)  Mg + 2HCl → 2H+ + MgCl 
B)  Mg + 2HCl → H2 + MgCl2  
C)  Mg + 2HCl → Cl2 + MgH2 
D)  Mg + 2HCl → Cl2 + Mg2+ + 2H+

Question 9

What is another name for potassium nitrate?

Accepted Answer

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

Question 10

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

Accepted Answer

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

Question 11

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

Question 12

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. 
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.

Question 13

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) 
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)

Question 14

What is the molecular shape of AlF3?

Accepted Answer

A)  Tetrahedral 
B)  Linear 
C)  Trigonal pyramidal 
D)  Square planar 
E)  Trigonal planar 
A)  Tetrahedral 
B)  Linear 
C)  Trigonal pyramidal 
D)  Square planar 
E)  Trigonal planar

Question 15

Volatile impurities are removed from ores by means of

Accepted Answer

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

Question 16

Which mineral is not a silicate?

Accepted Answer

A)  Zircon 
B)  Beryl 
C)  Smithsonite 
D)  Albite 
E)  Talc 
A)  Zircon 
B)  Beryl 
C)  Smithsonite 
D)  Albite 
E)  Talc

Question 17

Elements in a group exhibit different properties.

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 19

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

Accepted Answer

A)  Fe 
B)  Ti 
C)  Zn 
D)  Mg 
E)  Ag 
A)  Fe 
B)  Ti 
C)  Zn 
D)  Mg 
E)  Ag

Question 20

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. 
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.

Exam 24: Nonmetallic Elements and Their Compounds

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

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

Aluminum chloride exists as a dimer.

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

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

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

Which is a covalent oxide?

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

What is another name for potassium nitrate?

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

What elements are alloyed to make stainless steel?

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

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

What is the molecular shape of AlF3?

Volatile impurities are removed from ores by means of

Which mineral is not a silicate?

Elements in a group exhibit different properties.

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

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

The Hall process refers to

Chemistry: the Central Science

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Organic Chemistry

Filters

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

What is the molecular shape of AlF₃?