Question 1

Reaction of iron with which one of the following acids will result in the direct production of Fe3+?

Accepted Answer

A)  HI 
B)  dilute H2SO4 
C)  HCl 
D)  HNO3 
E)  CH3COOH 
A)  HI 
B)  dilute H2SO4 
C)  HCl 
D)  HNO3 
E)  CH3COOH

Question 2

The maximum oxidation state in the first transition series is .

Accepted Answer

A)  +2 
B)  +4 
C)  +5 
D)  +7 
E)  +8 
A)  +2 
B)  +4 
C)  +5 
D)  +7 
E)  +8

Question 3

Give the name and formula of the two important ores of iron.

Accepted Answer

hematite,

Question 4

12 karat gold contains % gold.

Accepted Answer

A)  25 
B)  12 
C)  100 
D)  75 
E)  50 
A)  25 
B)  12 
C)  100 
D)  75 
E)  50

Question 5

A material that contains more than one element and has the characteristic properties of metals is called a (an) .

Accepted Answer

The answer of A material that contains more than one...

Question 6

Calcining is the heating an ore to bring about the elimination of calcium salts.

Accepted Answer

A) True 
 B)False

Question 7

Why do aqueous solutions of Cr2+ usually appear violet instead of blue?

Accepted Answer

A)  The intensity of the color is so low it appears violet instead of blue. 
B)  Chromium(II) rapidly forms a complex ion with water and that ion is violet- colored. 
C)  Chromium(II) reacts with water to form a hydroxide- containing complex ion that is violet- colored. 
D)  Chromium(II) is rapidly oxidized to chromium(III) by atmospheric oxygen. 
E)  Water usually contains enough chloride ion to form a complex ion containing chloride and that substance is violet- colored. 
A)  The intensity of the color is so low it appears violet instead of blue. 
B)  Chromium(II) rapidly forms a complex ion with water and that ion is violet- colored. 
C)  Chromium(II) reacts with water to form a hydroxide- containing complex ion that is violet- colored. 
D)  Chromium(II) is rapidly oxidized to chromium(III) by atmospheric oxygen. 
E)  Water usually contains enough chloride ion to form a complex ion containing chloride and that substance is violet- colored.

Question 8

Most of the compounds of copper in the _ oxidation state are insoluble in water.

Accepted Answer

A)  +2 
B)  +6 
C)  +1 
D)  +3 
E)  +7 
A)  +2 
B)  +6 
C)  +1 
D)  +3 
E)  +7

Question 9

Which mineral contains aluminum?

Accepted Answer

A)  malachite 
B)  bauxite 
C)  cinnabar 
D)  magnetite 
E)  galena 
A)  malachite 
B)  bauxite 
C)  cinnabar 
D)  magnetite 
E)  galena

Question 10

An aqueous solution of Fe(NO3)3 will slowly form a red- brown precipitate due to the formation of
)

Accepted Answer

A)  Fe(OH)3  
B)  FeO 
C)  Fe3O4  
D)  FeO2  
E)  Fe(OH)2 
A)  Fe(OH)3  
B)  FeO 
C)  Fe3O4  
D)  FeO2  
E)  Fe(OH)2

Question 11

When hydrogen gas is used to reduce an ore (as in a blast furnace), it is converted to .

Accepted Answer

A)  hydrogen peroxide 
B)  hydroxide 
C)  ammonia 
D)  water 
E)  helium 
A)  hydrogen peroxide 
B)  hydroxide 
C)  ammonia 
D)  water 
E)  helium

Question 12

The major impurities found in bauxite are .

Accepted Answer

A)  Fe and H2O 
B)  SiO2 and Fe2O3 
C)  Al2O3 and H2O 
D)  carbon and salicylic acid 
E)  Al2O3 and OH- 
A)  Fe and H2O 
B)  SiO2 and Fe2O3 
C)  Al2O3 and H2O 
D)  carbon and salicylic acid 
E)  Al2O3 and OH-

Question 13

Which one of the following is a property of most metals?

Accepted Answer

A)  brittleness 
B)  high electronegativity 
C)  low melting point 
D)  thermal conductivity 
E)  acidic oxides 
A)  brittleness 
B)  high electronegativity 
C)  low melting point 
D)  thermal conductivity 
E)  acidic oxides

Question 14

Silicon, doped with a group 5A element forms a(n) - type semiconductor. Silicon doped with a group 3A element forms a(n) - type semiconductor.

Accepted Answer

A)  n, n 
B)  n, p 
C)  p, n 
D)  p, p 
E)  None of the above is correct. 
A)  n, n 
B)  n, p 
C)  p, n 
D)  p, p 
E)  None of the above is correct.

Question 15

Which of the following equations represents a calcination?

Accepted Answer

A)  PbCO3 (s)  PbO (s) + CO2 (g) 
B)  CaO (l) + SiO2 (l)  CaSiO3 (l) 
C)  HgS (s) + O2 (g)  Hg (g) + SO2 (g) 
D)  PbO (s) + CO (g) Pb (l) + CO2 (g) 
E)  All of the above are calcination processes. 
A)  PbCO3 (s)  PbO (s) + CO2 (g) 
B)  CaO (l) + SiO2 (l)  CaSiO3 (l) 
C)  HgS (s) + O2 (g)  Hg (g) + SO2 (g) 
D)  PbO (s) + CO (g) Pb (l) + CO2 (g) 
E)  All of the above are calcination processes.

Question 16

Which one of the following is false concerning the Bayer Process?

Accepted Answer

A)  It is a hydrometallurgical process. 
B)  It results in the separation of aluminum from iron and silicon. 
C)  It involves treatment of bauxite with cold, dilute sodium hydroxide solution. 
D)  It is used to purify bauxite. 
E)  In the process, aluminum is converted to a soluble aluminate ion. 
A)  It is a hydrometallurgical process. 
B)  It results in the separation of aluminum from iron and silicon. 
C)  It involves treatment of bauxite with cold, dilute sodium hydroxide solution. 
D)  It is used to purify bauxite. 
E)  In the process, aluminum is converted to a soluble aluminate ion.

Question 17

In the Bayer process, what is the product of calcination of the aluminum hydroxide recovered from the digestion in base?

Accepted Answer

A)  Al(OH)4- (aq) 
B)  Al · xH2O (s) 
C)  Al (s) 
D)  Al(OH)3 (s) 
E)  Al2O3 (s) 
A)  Al(OH)4- (aq) 
B)  Al · xH2O (s) 
C)  Al (s) 
D)  Al(OH)3 (s) 
E)  Al2O3 (s)

Question 18

What two metals are alloyed to produce sterling silver?

Accepted Answer

The answer of What two metals are alloyed to produce...

Question 19

A small amount of barium chloride solution is added to a blue solution. A white precipitate forms. The blue solution contains

Accepted Answer

A)  CoCl2  
B)  CuSO4  
C)  NiSO4  
D)  Co(NO3)3  
E)  CuCl2 
A)  CoCl2  
B)  CuSO4  
C)  NiSO4  
D)  Co(NO3)3  
E)  CuCl2

Question 20

What is the product of the following (unbalanced) equation?

Accepted Answer

A)  Al(OH)4- (aq) 
B)  Al2(OH)6 (s) 
C)  Al(OH)3 (s) 
D)  Al2 · 2H2O (s) 
E)  Al3+ (aq) 
A)  Al(OH)4- (aq) 
B)  Al2(OH)6 (s) 
C)  Al(OH)3 (s) 
D)  Al2 · 2H2O (s) 
E)  Al3+ (aq)

Exam 23: Metals and Metallurgy

Reaction of iron with which one of the following acids will result in the direct production of Fe3+?

The maximum oxidation state in the first transition series is .

Give the name and formula of the two important ores of iron.

12 karat gold contains % gold.

A material that contains more than one element and has the characteristic properties of metals is called a (an) .

Calcining is the heating an ore to bring about the elimination of calcium salts.

Why do aqueous solutions of Cr2+ usually appear violet instead of blue?

Most of the compounds of copper in the _ oxidation state are insoluble in water.

Which mineral contains aluminum?

An aqueous solution of Fe(NO3)3 will slowly form a red- brown precipitate due to the formation of )

When hydrogen gas is used to reduce an ore (as in a blast furnace), it is converted to .

The major impurities found in bauxite are .

Which one of the following is a property of most metals?

Silicon, doped with a group 5A element forms a(n) - type semiconductor. Silicon doped with a group 3A element forms a(n) - type semiconductor.

Which of the following equations represents a calcination?

Which one of the following is false concerning the Bayer Process?

In the Bayer process, what is the product of calcination of the aluminum hydroxide recovered from the digestion in base?

What two metals are alloyed to produce sterling silver?

A small amount of barium chloride solution is added to a blue solution. A white precipitate forms. The blue solution contains

What is the product of the following (unbalanced) equation?

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Gases

Intermolecular Forces, Liquids, and Solids

Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Chemistry of Coordination Compounds

The Chemistry of Life: Organic and Biological Chemistry

Filters

Reaction of iron with which one of the following acids will result in the direct production of Fe³⁺?

Why do aqueous solutions of Cr²⁺usually appear violet instead of blue?

An aqueous solution of Fe(NO₃)₃will slowly form a red- brown precipitate due to the formation of )