Question 1

Write the overall equation for reducing Cu2S to metallic copper.

Accepted Answer

A)  Cu2S(l) + C(s) → 2 Cu(l) + CS(g) 
B)  Cu2S(l) + CO(g) → 2 Cu(l) + CO(g) + S(s) 
C)  Cu2S(l) + 2 CO(g) + O2(g) → 2 Cu(l) + 2 CO2(g) + S(s) 
D)  Cu2S(l) + O2(g) → 2 CuO(s) + S(s) 
E)  Cu2S(l) + O2(g) → 2 Cu(l) + SO2(g) 
A)  Cu2S(l) + C(s) → 2 Cu(l) + CS(g) 
B)  Cu2S(l) + CO(g) → 2 Cu(l) + CO(g) + S(s) 
C)  Cu2S(l) + 2 CO(g) + O2(g) → 2 Cu(l) + 2 CO2(g) + S(s) 
D)  Cu2S(l) + O2(g) → 2 CuO(s) + S(s) 
E)  Cu2S(l) + O2(g) → 2 Cu(l) + SO2(g)

Question 2

The net formation constant for tetraamminezinc(II) is 4.1 × 108. What would be the approximate potential of the galvanic cell symbolized below? Zn/Zn(NH3)42+ (1.0 M), NH3(1.0 M)//Zn2+(1.0 M)/Zn

Accepted Answer

A)  0.76 V 
B)  0.00 V 
C)  0.51 V 
D)  0.25 V 
E)  1.02 V 
A)  0.76 V 
B)  0.00 V 
C)  0.51 V 
D)  0.25 V 
E)  1.02 V

Question 3

Write the electron configuration for Co3+.

Accepted Answer

A)  [Ar]3d6 
B)  [Ar]4s23d4 
C)  [Ar]4s24p4 
D)  [Ar]4s14p1 
E)  [Ar]5s2 
A)  [Ar]3d6 
B)  [Ar]4s23d4 
C)  [Ar]4s24p4 
D)  [Ar]4s14p1 
E)  [Ar]5s2

Question 4

Choose the INCORRECT statement.

Accepted Answer

A)  Galvanized iron is iron coated with zinc. 
B)  Mercury is the only metal that is liquid at 25°C. 
C)  Hatter's disease is a form of mercury poisoning, i.e., the Mad Hatter, the friend of Alice. 
D)  Brass is an alloy of mostly copper and zinc. 
E)  Amalgams are zinc alloys. 
A)  Galvanized iron is iron coated with zinc. 
B)  Mercury is the only metal that is liquid at 25°C. 
C)  Hatter's disease is a form of mercury poisoning, i.e., the Mad Hatter, the friend of Alice. 
D)  Brass is an alloy of mostly copper and zinc. 
E)  Amalgams are zinc alloys.

Question 5

Choose the INCORRECT statement about the electron configuration of transition elements.

Accepted Answer

A)  Cu: [Ar]3d104s1 
B)  Fe: [Ar]3d64s2 
C)  Cr: [Ar]3d44s2 
D)  V: [Ar]3d34s2 
E)  Zn: [Ar]3d104s2 
A)  Cu: [Ar]3d104s1 
B)  Fe: [Ar]3d64s2 
C)  Cr: [Ar]3d44s2 
D)  V: [Ar]3d34s2 
E)  Zn: [Ar]3d104s2

Question 6

An iron plate of 0.559 m2 surface area is to be chrome plated using a chromic acid-sulfuric acid plating bath. The anode and cathode half-equations are: Cathode: Cr2O72- + 14 H+ + 12 e- → 2 Cr + 7 H2O  &emsp;  E° = 0.320 V
Anode: 2 H2O → O2 + 4 H+ + 4 e-  &emsp;  E° = 1.229 V
Determine the minimum energy needed to produce a plating 0.115 mm thick on the iron plate. The density of chromium is 7.19 g/cm3.

Accepted Answer

A)  526 kJ 
B)  780 kJ 
C)  1.05 × 103 kJ 
D)  4.68 × 103 kJ 
E)  9.36 × 103 kJ 
A)  526 kJ 
B)  780 kJ 
C)  1.05 × 103 kJ 
D)  4.68 × 103 kJ 
E)  9.36 × 103 kJ

Question 7

The metallurgical method for obtaining a metal from its ore by roasting the ore and then reducing the resulting metal oxide is called ________.

Accepted Answer

A)  zone melting 
B)  pyrometallurgy 
C)  leaching 
D)  hydrometallurgy 
E)  flotation 
A)  zone melting 
B)  pyrometallurgy 
C)  leaching 
D)  hydrometallurgy 
E)  flotation

Question 8

Which of the following metals form compounds with the highest oxidation states?

Accepted Answer

A)  V 
B)  Ti 
C)  Mn 
D)  Y 
E)  Sc 
A)  V 
B)  Ti 
C)  Mn 
D)  Y 
E)  Sc

Question 9

Choose the INCORRECT statement about transition elements.

Accepted Answer

A)  Ferromagnetism occurs only in elements with paired electrons. 
B)  Ferromagnetism is unique to Fe, Co and Ni. 
C)  Ferromagnetism occurs due to atoms combining in the solid state in domains. 
D)  Paramagnetism is due to unpaired electrons. 
E)  Ferromagnetism requires that interatomic distances be of the right magnitude to generate domains. 
A)  Ferromagnetism occurs only in elements with paired electrons. 
B)  Ferromagnetism is unique to Fe, Co and Ni. 
C)  Ferromagnetism occurs due to atoms combining in the solid state in domains. 
D)  Paramagnetism is due to unpaired electrons. 
E)  Ferromagnetism requires that interatomic distances be of the right magnitude to generate domains.

Question 10

Choose the INCORRECT statement.

Accepted Answer

A)  Cu, Ag, and Au are the preferred metals for coins because they are durable and resistant to corrosion. 
B)  Cu, Ag, and Au are used in the electronics industry because of their conductivity. 
C)  Cu, Ag, and Au do not readily react with HCl although most metals do. 
D)  Tarnish is black Ag2S. 
E)  Silver is the basis for the world's monetary reserve. 
A)  Cu, Ag, and Au are the preferred metals for coins because they are durable and resistant to corrosion. 
B)  Cu, Ag, and Au are used in the electronics industry because of their conductivity. 
C)  Cu, Ag, and Au do not readily react with HCl although most metals do. 
D)  Tarnish is black Ag2S. 
E)  Silver is the basis for the world's monetary reserve.

Question 11

The high melting points of transition elements result from a lack of sufficient electrons and orbitals for good metallic bonding.

Accepted Answer

A) True 
 B)False

Question 12

Choose the INCORRECT statement about the transition elements.

Accepted Answer

A)  The atomic radii increases to the right across the periodic table. 
B)  The first ionization energy is about the same as the Group 2 (II
A)  elements. 
C)  The lanthanide contraction is responsible for the second and third series of transition elements being very similar in atomic radii. 
D)  The lanthanide contraction is due to the f electrons not screening as well as other electrons. 
E)  The electron configuration of cobalt and copper are anomalous. 
A)  The atomic radii increases to the right across the periodic table. 
B)  The first ionization energy is about the same as the Group 2 (II
A)  elements. 
C)  The lanthanide contraction is responsible for the second and third series of transition elements being very similar in atomic radii. 
D)  The lanthanide contraction is due to the f electrons not screening as well as other electrons. 
E)  The electron configuration of cobalt and copper are anomalous.

Question 13

Which of the following elements is likely to have an atomic radius of 124 pm?

Accepted Answer

A)  Fe 
B)  Ru 
C)  Os 
D)  Mo 
A)  Fe 
B)  Ru 
C)  Os 
D)  Mo

Question 14

What is the approximate pH of the H+/H2 electrode compartment through which H2 gas is bubbled at a pressure of 1.00 atm if this electrode, when coupled with a Ni/(0.10 M) Ni2+ electrode, forms a galvanic cell having an initial potential of 0.10 V? [The discharge reaction involves oxidation of nickel to Ni2+.]

Accepted Answer

A)  2.15 
B)  4.65 
C)  6.15 
D)  3.15 
E)  3.65 
A)  2.15 
B)  4.65 
C)  6.15 
D)  3.15 
E)  3.65

Question 15

A 0.535 g sample of pyrolusite ore (impure MnO2) is treated with 1.42 g oxalic acid (H2C2O4 ∙ 2H2O) in an acidic medium. Following this reaction, the excess oxalic acid is titrated with 0.1000 M KMnO4, 36.6 mL being required. What is the % MnO2 in the ore? The reactions are: H2C2O4 + MnO2 + 2 H+ → Mn2+ + 2 H2O + 2 CO2
5 H2C2O4 + 2 MnO4- + 6 H+ → 2 Mn2+ + 8 H2O + 10 CO2

Accepted Answer

A)  34.4% 
B)  61.1% 
C)  2.33% 
D)  1.22% 
E)  38.9% 
A)  34.4% 
B)  61.1% 
C)  2.33% 
D)  1.22% 
E)  38.9%

Question 16

Iron, cobalt, and nickel form the iron triad.

Accepted Answer

A) True 
 B)False

Question 17

A mercury alloy is called an amalgam.

Accepted Answer

A) True 
 B)False

Question 18

The simplified equation for the reduction of iron ore is: Fe2O3(s) + CO(g) → Fe(l) + CO2(g)
When it is balanced, the coefficients are ________.

Accepted Answer

A)  1, 3, 2, 3 
B)  1, 3, 1, 3 
C)  1, 1, 1, 2 
D)  2, 6, 3, 3 
E)  1, 1, 2, 1 
A)  1, 3, 2, 3 
B)  1, 3, 1, 3 
C)  1, 1, 1, 2 
D)  2, 6, 3, 3 
E)  1, 1, 2, 1

Question 19

List the following in order of increasing atomic radius: Ti, Cr, V, Ca

Accepted Answer

A)  V < Ti < Ca < Cr 
B)  Ca < V < Cr < Ti 
C)  Ca < Ti < Cr < V 
D)  Cr < V < Ti < Ca 
E)  Cr < V < Ca < Ti 
A)  V < Ti < Ca < Cr 
B)  Ca < V < Cr < Ti 
C)  Ca < Ti < Cr < V 
D)  Cr < V < Ti < Ca 
E)  Cr < V < Ca < Ti

Question 20

Choose the INCORRECT statement.

Accepted Answer

A)  Iron is the most widely used metal from the earth's crust. 
B)  The simplified equation for the reduction of iron is Fe2O3(s) + 3 CO(g) → 2 Fe(l) + 3 CO2(g). 
C)  One process in the making of steel from pig iron is to reduce the carbon content. 
D)  The product of a blast furnace is steel. 
E)  The solid reactants in a blast furnace are iron ore, coke, and a slag-forming flux. 
A)  Iron is the most widely used metal from the earth's crust. 
B)  The simplified equation for the reduction of iron is Fe2O3(s) + 3 CO(g) → 2 Fe(l) + 3 CO2(g). 
C)  One process in the making of steel from pig iron is to reduce the carbon content. 
D)  The product of a blast furnace is steel. 
E)  The solid reactants in a blast furnace are iron ore, coke, and a slag-forming flux.

Exam 23: The Transition Elements

Write the overall equation for reducing Cu2S to metallic copper.

The net formation constant for tetraamminezinc(II) is 4.1 × 108. What would be the approximate potential of the galvanic cell symbolized below? Zn/Zn(NH3)42+ (1.0 M), NH3(1.0 M)//Zn2+(1.0 M)/Zn

Write the electron configuration for Co3+.

Choose the INCORRECT statement.

Choose the INCORRECT statement about the electron configuration of transition elements.

The metallurgical method for obtaining a metal from its ore by roasting the ore and then reducing the resulting metal oxide is called ________.

Which of the following metals form compounds with the highest oxidation states?

Choose the INCORRECT statement about transition elements.

Choose the INCORRECT statement.

The high melting points of transition elements result from a lack of sufficient electrons and orbitals for good metallic bonding.

Choose the INCORRECT statement about the transition elements.

Which of the following elements is likely to have an atomic radius of 124 pm?

Iron, cobalt, and nickel form the iron triad.

A mercury alloy is called an amalgam.

The simplified equation for the reduction of iron ore is: Fe2O3(s) + CO(g) → Fe(l) + CO2(g) When it is balanced, the coefficients are ________.

List the following in order of increasing atomic radius: Ti, Cr, V, Ca

Choose the INCORRECT statement.

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

The net formation constant for tetraamminezinc(II) is 4.1 × 108. What would be the approximate potential of the galvanic cell symbolized below? Zn/Zn(NH₃)₄²⁺ (1.0 M), NH₃(1.0 M)//Zn²⁺(1.0 M)/Zn

Write the electron configuration for Co³⁺.

The simplified equation for the reduction of iron ore is: Fe₂O₃(s) + CO(g) → Fe(l) + CO₂(g) When it is balanced, the coefficients are ________.