Question 1

Which of the following is amphoteric?

Accepted Answer

A)  V2O5 
B)  CrO 
C)  Al(H2O)63+ 
D)  Fe(H2O)63+ 
A)  V2O5 
B)  CrO 
C)  Al(H2O)63+ 
D)  Fe(H2O)63+

Question 2

How much carbon monoxide is required to reduce 2.00 metric tons (2000 kg) of iron ore if the ore is 5.03% iron? Fe2O3(s) + 3 CO(g) → 2 Fe(l) + 3 CO2(g)

Accepted Answer

A)  151 kg 
B)  75.7 kg 
C)  25.2 kg 
D)  40.7 kg 
E)  50.5 kg 
A)  151 kg 
B)  75.7 kg 
C)  25.2 kg 
D)  40.7 kg 
E)  50.5 kg

Question 3

List the following in order of increasing number of unpaired electrons: Fe, V, Sc, Mn

Accepted Answer

A)  Mn < Fe < V < Sc 
B)  Sc < V < Fe < Mn 
C)  Fe < V < Sc < Mn 
D)  V < Sc < Mn < Fe 
E)  Sc < Mn < Fe < V 
A)  Mn < Fe < V < Sc 
B)  Sc < V < Fe < Mn 
C)  Fe < V < Sc < Mn 
D)  V < Sc < Mn < Fe 
E)  Sc < Mn < Fe < V

Question 4

Which of the following definitions is INCORRECT?

Accepted Answer

A)  amalgam: a solid solution or alloy containing mercury 
B)  coinage metals: the transition elements of Group 11 (1
B)  
C)  galvanized iron: iron which has been electroplated with tin 
D)  lanthanides: elements of atomic number 58 through 71 
E)  pig iron: slightly impure iron as obtained directly from the blast furnace 
A)  amalgam: a solid solution or alloy containing mercury 
B)  coinage metals: the transition elements of Group 11 (1
B)  
C)  galvanized iron: iron which has been electroplated with tin 
D)  lanthanides: elements of atomic number 58 through 71 
E)  pig iron: slightly impure iron as obtained directly from the blast furnace

Question 5

Titanium tetrachloride has replaced white lead as the pigment in white paints.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following exhibits ferromagnetism?

Accepted Answer

A)  Ni 
B)  Ru 
C)  Rh 
D)  Mn 
A)  Ni 
B)  Ru 
C)  Rh 
D)  Mn

Question 7

Write the equation for the initial treatment of titanium ore.

Accepted Answer

A)  TiO2(s) + Cl2(g) + C(s) → TiCl2(g) + CO2(g) 
B)  TiCl4(s) + 2 H2O(l) → TiO2(g) + HCl(g) 
C)  TiO2(s) + 2 Cl2(g) + C(s) → TiCl4(g) + 2 CO(g) 
D)  Ti(s) + 2 Cl2(g) → TiCl4(g) 
E)  TiS(s) + 2H2O(l) → TiO2(g) + 2 H2S(g) 
A)  TiO2(s) + Cl2(g) + C(s) → TiCl2(g) + CO2(g) 
B)  TiCl4(s) + 2 H2O(l) → TiO2(g) + HCl(g) 
C)  TiO2(s) + 2 Cl2(g) + C(s) → TiCl4(g) + 2 CO(g) 
D)  Ti(s) + 2 Cl2(g) → TiCl4(g) 
E)  TiS(s) + 2H2O(l) → TiO2(g) + 2 H2S(g)

Question 8

Which of the following will be a good oxidizing agent?

Accepted Answer

A)  V2O5 
B)  Fe(OH2)62+ 
C)  Zn 
D)  CoCl2 
A)  V2O5 
B)  Fe(OH2)62+ 
C)  Zn 
D)  CoCl2

Question 9

Choose the INCORRECT statement about transition elements.

Accepted Answer

A)  Coordination compounds are formed by coordinate covalent bonds. 
B)  The metal ions provide empty d orbitals in coordination compounds. 
C)  The ligand supplies one or more pairs of electrons that form coordinate bonds in coordination compounds. 
D)  Colored compounds and solutions occur because of electronic transitions that occur within partially filled d orbitals. 
E)  Paramagnetism is due to paired electrons. 
A)  Coordination compounds are formed by coordinate covalent bonds. 
B)  The metal ions provide empty d orbitals in coordination compounds. 
C)  The ligand supplies one or more pairs of electrons that form coordinate bonds in coordination compounds. 
D)  Colored compounds and solutions occur because of electronic transitions that occur within partially filled d orbitals. 
E)  Paramagnetism is due to paired electrons.

Question 10

Estimate the net formation constant for diamminesilver(I) ion from the following data: Ag+ + e- → Ag   &emsp;E° = 0.80 V
Ag(NH3)2+ + e- → Ag + 2 NH3  &emsp; E° = 0.37 V

Accepted Answer

A)  6 × 1011 
B)  5 × 1010 
C)  4 × 109 
D)  3 × 108 
E)  2 × 107 
A)  6 × 1011 
B)  5 × 1010 
C)  4 × 109 
D)  3 × 108 
E)  2 × 107

Question 11

Pig iron comes from the blast furnace.

Accepted Answer

A) True 
 B)False

Question 12

Choose the INCORRECT statement.

Accepted Answer

A)  Titanium is valued for its low density, high structural strength and corrosion resistance. 
B)  Titanium chloride is the most widely used white pigment for paints. 
C)  Chromium is often used to plate other metals for decorative purposes. 
D)  Dichromate is Cr2O72-. 
E)  Chromate is CrO42-. 
A)  Titanium is valued for its low density, high structural strength and corrosion resistance. 
B)  Titanium chloride is the most widely used white pigment for paints. 
C)  Chromium is often used to plate other metals for decorative purposes. 
D)  Dichromate is Cr2O72-. 
E)  Chromate is CrO42-.

Question 13

Choose the INCORRECT statement.

Accepted Answer

A)  Hydrometallurgy handles materials as aqueous solutions. 
B)  The three steps of hydrometallurgy are leaching, purification and/or concentration and precipitation. 
C)  Leaching is adding chemicals to eat away the ore, leaving the metal. 
D)  Purification in hydrometallurgy is to remove impurities and concentrate solutions. 
E)  Purification in hydrometallurgy may include evaporation of water, ion exchange, and/or use of activated charcoal. 
A)  Hydrometallurgy handles materials as aqueous solutions. 
B)  The three steps of hydrometallurgy are leaching, purification and/or concentration and precipitation. 
C)  Leaching is adding chemicals to eat away the ore, leaving the metal. 
D)  Purification in hydrometallurgy is to remove impurities and concentrate solutions. 
E)  Purification in hydrometallurgy may include evaporation of water, ion exchange, and/or use of activated charcoal.

Question 14

Choose the INCORRECT statement about transition elements.

Accepted Answer

A)  The lower oxidation states usually form ionic compounds. 
B)  The higher oxidation states usually form covalent compounds. 
C)  Many transition elements and their compounds have catalytic activity. 
D)  The catalytic activity is due to p-orbital availability. 
E)  Transition metal ions are good Lewis acids. 
A)  The lower oxidation states usually form ionic compounds. 
B)  The higher oxidation states usually form covalent compounds. 
C)  Many transition elements and their compounds have catalytic activity. 
D)  The catalytic activity is due to p-orbital availability. 
E)  Transition metal ions are good Lewis acids.

Question 15

Choose the INCORRECT statement.

Accepted Answer

A)  Precipitation in hydrometallurgy is to precipitate the metal as an ionic solid or reduce it to the metal. 
B)  Leaching for gold is done by the cyanidation process where Au+ is complexed with cyanide ion. 
C)  In cyanidation, the gold is displaced from the complex by an active metal. 
D)  Pyrometallurgy uses low temperature to freeze out the metal from the ore. 
E)  Hydometallurgy uses water and aqueous solutions at moderate temperatures to handle materials. 
A)  Precipitation in hydrometallurgy is to precipitate the metal as an ionic solid or reduce it to the metal. 
B)  Leaching for gold is done by the cyanidation process where Au+ is complexed with cyanide ion. 
C)  In cyanidation, the gold is displaced from the complex by an active metal. 
D)  Pyrometallurgy uses low temperature to freeze out the metal from the ore. 
E)  Hydometallurgy uses water and aqueous solutions at moderate temperatures to handle materials.

Question 16

Lanthanides are very difficult to separate from each other because of the similarities in chemical properties.

Accepted Answer

A) True 
 B)False

Question 17

Write the chemical equation for the reduction of Cr2O3 to chromium with silicon as the reducing agent.

Accepted Answer

A)  Si(s) + Cr2O3(s) → SiO3(s) + Cr(l) 
B)  Si(s) + Cr2O3(s) → SiO2(s) + 2 CrO(s) 
C)  3 Si(s) + 2 Cr2O3(s) → 3 SiO2(s) + 4 Cr(l) 
D)  3 Si(s) + Cr2O3(s) → 3 SiO(s) + 2 Cr(l) 
E)  4 Si(s) + Cr2O3(s) → SiO3(s) + 2 CrO(s) 
A)  Si(s) + Cr2O3(s) → SiO3(s) + Cr(l) 
B)  Si(s) + Cr2O3(s) → SiO2(s) + 2 CrO(s) 
C)  3 Si(s) + 2 Cr2O3(s) → 3 SiO2(s) + 4 Cr(l) 
D)  3 Si(s) + Cr2O3(s) → 3 SiO(s) + 2 Cr(l) 
E)  4 Si(s) + Cr2O3(s) → SiO3(s) + 2 CrO(s)

Question 18

Write the probable electron configuration for Ti2+.

Accepted Answer

A)  3d2 
B)  4s2 
C)  4s13d5 
D)  4s24d4 
E)  5s2 
A)  3d2 
B)  4s2 
C)  4s13d5 
D)  4s24d4 
E)  5s2

Question 19

Choose the INCORRECT statement.

Accepted Answer

A)  Zn, Cd, and Hg all have electron configurations of (n-1)d10ns2. 
B)  Because in Zn, Cd, and Hg only s electrons are participating, metallic bonding is strong. 
C)  The low melting and boiling points of Zn, Cd, and Hg are due to the metallic bonding. 
D)  Galvanized iron is iron coated with zinc. 
E)  Cadmium and mercury compounds are poisonous. 
A)  Zn, Cd, and Hg all have electron configurations of (n-1)d10ns2. 
B)  Because in Zn, Cd, and Hg only s electrons are participating, metallic bonding is strong. 
C)  The low melting and boiling points of Zn, Cd, and Hg are due to the metallic bonding. 
D)  Galvanized iron is iron coated with zinc. 
E)  Cadmium and mercury compounds are poisonous.

Question 20

Which is most probably the ground state electron configuration for the iron(III) ion?

Accepted Answer

A)  [Ar]4s23d3 
B)  [Ar]4s13d4 
C)  [Ar]4s03d33p3 
D)  [Ar]4s04p5 
E)  [Ar]4s03d5 
A)  [Ar]4s23d3 
B)  [Ar]4s13d4 
C)  [Ar]4s03d33p3 
D)  [Ar]4s04p5 
E)  [Ar]4s03d5

Exam 23: The Transition Elements

Which of the following is amphoteric?

How much carbon monoxide is required to reduce 2.00 metric tons (2000 kg) of iron ore if the ore is 5.03% iron? Fe2O3(s) + 3 CO(g) → 2 Fe(l) + 3 CO2(g)

List the following in order of increasing number of unpaired electrons: Fe, V, Sc, Mn

Which of the following definitions is INCORRECT?

Titanium tetrachloride has replaced white lead as the pigment in white paints.

Which of the following exhibits ferromagnetism?

Write the equation for the initial treatment of titanium ore.

Which of the following will be a good oxidizing agent?

Choose the INCORRECT statement about transition elements.

Estimate the net formation constant for diamminesilver(I) ion from the following data: Ag+ + e- → Ag E° = 0.80 V Ag(NH3)2+ + e- → Ag + 2 NH3 E° = 0.37 V

Pig iron comes from the blast furnace.

Choose the INCORRECT statement.

Choose the INCORRECT statement.

Choose the INCORRECT statement about transition elements.

Choose the INCORRECT statement.

Lanthanides are very difficult to separate from each other because of the similarities in chemical properties.

Write the chemical equation for the reduction of Cr2O3 to chromium with silicon as the reducing agent.

Write the probable electron configuration for Ti2+.

Choose the INCORRECT statement.

Which is most probably the ground state electron configuration for the iron(III) ion?

Matter - Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Additional Aspects

Intermolecular Forces: Liquids and Solids

Solutions and Their Physical Properties

Chemical Kinetics

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Spontaneous Change: Entropy and Free Energy

Electrochemistry

Main Group Elements I: Groups 1, 2, 13, and 14

Main Group Elements II: Groups 18, 17, 16, 15, and Hydrogen

Complex Ions and Coordination Compounds

Nuclear Chemistry 1-41

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

How much carbon monoxide is required to reduce 2.00 metric tons (2000 kg) of iron ore if the ore is 5.03% iron? Fe₂O₃(s) + 3 CO(g) → 2 Fe(l) + 3 CO₂(g)

Estimate the net formation constant for diamminesilver(I) ion from the following data: Ag+ + e- → Ag E° = 0.80 V Ag(NH₃)²⁺ + e- → Ag + 2 NH₃ E° = 0.37 V

Write the chemical equation for the reduction of Cr₂O₃ to chromium with silicon as the reducing agent.

Write the probable electron configuration for Ti²⁺.