Question 1

Which undergoes electrolysis to form calcium metal?

Accepted Answer

A)  Ca(OH)2 
B)  Ca(NO3)2 
C)  CaI2 
D)  CaF2 
E)  CaCl2 
A)  Ca(OH)2 
B)  Ca(NO3)2 
C)  CaI2 
D)  CaF2 
E)  CaCl2

Question 2

What is the chemical formula for limestone?

Accepted Answer

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

Question 3

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. 
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.

Question 4

What is the major component in limestone?

Accepted Answer

A)  NaNO3 
B)  KCl 
C)  CaCl 
D)  BaSO4 
E)  CaCO3 
A)  NaNO3 
B)  KCl 
C)  CaCl 
D)  BaSO4 
E)  CaCO3

Question 5

What is the chemical formula for gypsum?

Accepted Answer

A)  CaSO4 • 2H2O 
B)  CaF2 
C)  MgSO4 • 5H2O 
D)  MgSO4 • 7H2O 
E)  CaCl2 
A)  CaSO4 • 2H2O 
B)  CaF2 
C)  MgSO4 • 5H2O 
D)  MgSO4 • 7H2O 
E)  CaCl2

Question 6

What is the chemical formula for cinnabar?

Accepted Answer

A)  HgS 
B)  SnBr 
C)  SnO2 
D)  TiO2 
E)  SnBr4 
A)  HgS 
B)  SnBr 
C)  SnO2 
D)  TiO2 
E)  SnBr4

Question 7

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

Question 8

What is another name for iron carbide (Fe3C)?

Accepted Answer

Question 9

Explain the method of zone refining.

Accepted Answer

A metal rod containing a few impurities

Question 10

Solids containing donor impurities are called ________ - ________ ________.

Accepted Answer

n-type sem

Question 11

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 drawing 
A)  Gangue 
B)  Mining 
C)  Fetching 
D)  Flotation 
E)  Mineral drawing

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

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)  CaO 
A)  BeO 
B)  MgO 
C)  SO2 
D)  B2O3 
E)  CaO

Question 14

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 15

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

Question 16

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. 
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.

Question 17

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

Accepted Answer

Alumina ac

Exam 24: Nonmetallic Elements and Their Compounds

Which undergoes electrolysis to form calcium metal?

What is the chemical formula for limestone?

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

What is the major component in limestone?

What is the chemical formula for gypsum?

What is the chemical formula for cinnabar?

Which is the principal reducing agent in a blast furnace?

What is another name for iron carbide (Fe3C)?

Explain the method of zone refining.

Solids containing donor impurities are called ________ - ________ ________.

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

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

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

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

Electrometallurgy uses ________ to separate a metal from its ore.

According to the band theory, a band is

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

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

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

What is another name for iron carbide (Fe₃C)?

Solids containing donor impurities are called - .

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