Question 1

When nitrogen undergoes atmospheric fixation, it enters the sea and land in the form of:

Accepted Answer

A)  NO 
B)  NO2 
C)  NH3 
D)  NO3¯ 
E)  NH4+ 
A)  NO 
B)  NO2 
C)  NH3 
D)  NO3¯ 
E)  NH4+

Question 2

Sulfide ores are frequently treated by flotation in order to concentrate them.

Accepted Answer

A) True 
 B)False

Question 3

In the commercial production of aluminum metal, the final stage involves the reaction
2Al2O3(in molten Na3AlF6) + 3C(graphite) $\rightarrow$ 4Al(l) + 3CO2(g)
Briefly outline the method and equipment with which the reaction is accomplished.

Accepted Answer

This is done electrolytically,

Question 4

The process of converting metal sulfides to metal oxides is called

Accepted Answer

A)  roasting. 
B)  smelting. 
C)  reduction. 
D)  leaching. 
E)  oxidation. 
A)  roasting. 
B)  smelting. 
C)  reduction. 
D)  leaching. 
E)  oxidation.

Question 5

Alloying a metal is done to

Accepted Answer

A)  make its extraction from its ore easier. 
B)  convert the metal to an oxide. 
C)  disguise the true identity of the metal. 
D)  prepare ultrapure metal samples. 
E)  enhance properties like conductivity. 
A)  make its extraction from its ore easier. 
B)  convert the metal to an oxide. 
C)  disguise the true identity of the metal. 
D)  prepare ultrapure metal samples. 
E)  enhance properties like conductivity.

Question 6

Describe, and give reasons for, the fundamental bonding differences between transition metal sulfides and transition metal oxides.

Accepted Answer

Transition metal oxides are ionic in nat

Question 7

The main end use of sulfuric acid is

Accepted Answer

A)  manufacture of iron and steel 
B)  processing of petroleum 
C)  production of fertilizers 
D)  production of explosives 
E)  production of various other chemicals 
A)  manufacture of iron and steel 
B)  processing of petroleum 
C)  production of fertilizers 
D)  production of explosives 
E)  production of various other chemicals

Question 8

The Frasch process is used to

Accepted Answer

A)  convert aluminum oxide to metallic aluminum. 
B)  convert copper ore to copper sulfide. 
C)  mine magnesium. 
D)  mine elemental sulfur. 
E)  produce sodium metal. 
A)  convert aluminum oxide to metallic aluminum. 
B)  convert copper ore to copper sulfide. 
C)  mine magnesium. 
D)  mine elemental sulfur. 
E)  produce sodium metal.

Question 9

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

Accepted Answer

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

Question 10

The Downs cell is used in the production of

Accepted Answer

A)  copper. 
B)  hydrogen. 
C)  iron. 
D)  magnesium. 
E)  sodium. 
A)  copper. 
B)  hydrogen. 
C)  iron. 
D)  magnesium. 
E)  sodium.

Question 11

Hydrogen displays the largest kinetic isotope effect of all the elements.

Accepted Answer

A) True 
 B)False

Question 12

The chlor-alkali process produces chlorine, Cl2(g), in large quantities. What other industrially important substances are produced in this process?

Accepted Answer

A)  Na(s), H2(g) 
B)  H2(g), O2(g) 
C)  Hg(l), NaCl(s) 
D)  Na(s), O2(g) 
E)  NaOH(aq), H2(g) 
A)  Na(s), H2(g) 
B)  H2(g), O2(g) 
C)  Hg(l), NaCl(s) 
D)  Na(s), O2(g) 
E)  NaOH(aq), H2(g)

Question 13

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 14

Give two important reasons why there is so much more Na+ in the oceans than K+, despite their similar abundances in the earth's crust.

Accepted Answer

Clays bind K⁺ more effectively

Question 15

The Hall-Héroult 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.

Question 16

The debris accompanying a mineral is called

Accepted Answer

A)  slag. 
B)  gangue. 
C)  ore. 
D)  halite. 
E)  ash. 
A)  slag. 
B)  gangue. 
C)  ore. 
D)  halite. 
E)  ash.

Question 17

The industrial production of ammonia from nitrogen and hydrogen accounts for a greater amount of nitrogen fixation than either the atmospheric or the biological pathways.

Accepted Answer

A) True 
 B)False

Question 18

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 19

Transition elements from the right side of the periodic table are generally found as

Accepted Answer

A)  sulfides because they tend to give up bonding electrons and form crystals with high lattice energies with sulfur. 
B)  sulfides because their electronegativities favor formation of covalent bonds with the polarizable sulfide anion. 
C)  oxides because they tend to give up bonding electrons and form crystals with high lattice energies with oxygen. 
D)  oxides because oxygen, with its high electronegativity, forms strong covalent bonds with them. 
E)  None of these choices is correct. 
A)  sulfides because they tend to give up bonding electrons and form crystals with high lattice energies with sulfur. 
B)  sulfides because their electronegativities favor formation of covalent bonds with the polarizable sulfide anion. 
C)  oxides because they tend to give up bonding electrons and form crystals with high lattice energies with oxygen. 
D)  oxides because oxygen, with its high electronegativity, forms strong covalent bonds with them. 
E)  None of these choices is correct.

Question 20

Carbon atoms in the carbon cycle spend most of their time in the oceans.

Accepted Answer

A) True 
 B)False

Exam 22: The Elements in Nature and Industry

When nitrogen undergoes atmospheric fixation, it enters the sea and land in the form of:

Sulfide ores are frequently treated by flotation in order to concentrate them.

In the commercial production of aluminum metal, the final stage involves the reaction 2Al2O3(in molten Na3AlF6) + 3C(graphite) →\rightarrow→ 4Al(l) + 3CO2(g) Briefly outline the method and equipment with which the reaction is accomplished.

The process of converting metal sulfides to metal oxides is called

Alloying a metal is done to

Describe, and give reasons for, the fundamental bonding differences between transition metal sulfides and transition metal oxides.

The main end use of sulfuric acid is

The Frasch process is used to

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

The Downs cell is used in the production of

Hydrogen displays the largest kinetic isotope effect of all the elements.

The chlor-alkali process produces chlorine, Cl2(g), in large quantities. What other industrially important substances are produced in this process?

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

Give two important reasons why there is so much more Na+ in the oceans than K+, despite their similar abundances in the earth's crust.

The Hall-Héroult process refers to

The debris accompanying a mineral is called

The industrial production of ammonia from nitrogen and hydrogen accounts for a greater amount of nitrogen fixation than either the atmospheric or the biological pathways.

Electrometallurgy uses _________________ to separate a metal from its ore.

Transition elements from the right side of the periodic table are generally found as

Carbon atoms in the carbon cycle spend most of their time in the oceans.

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

In the commercial production of aluminum metal, the final stage involves the reaction 2Al₂O₃(in molten Na₃AlF₆) + 3C(graphite) $\rightarrow$ 4Al(l) + 3CO₂(g) Briefly outline the method and equipment with which the reaction is accomplished.

The chlor-alkali process produces chlorine, Cl₂(g), in large quantities. What other industrially important substances are produced in this process?

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

Give two important reasons why there is so much more Na⁺ in the oceans than K⁺, despite their similar abundances in the earth's crust.