Question 1

Choose the INCORRECT statement.

Accepted Answer

A)  The Frasch process is a method of mining sulfur. 
B)  Photoconductivity is the production of photons by the use of electricity. 
C)  Selenium displays the property of photoconductivity. 
D)  Polonium is a rare radioactive metal. 
E)  Sulfur is used in vulcanizing rubber, as a pesticide and to produce sulfuric acid. 
A)  The Frasch process is a method of mining sulfur. 
B)  Photoconductivity is the production of photons by the use of electricity. 
C)  Selenium displays the property of photoconductivity. 
D)  Polonium is a rare radioactive metal. 
E)  Sulfur is used in vulcanizing rubber, as a pesticide and to produce sulfuric acid. B

Question 2

What is the molecular shape for XeOF2?

Accepted Answer

A)  trigonal planar 
B)  tetrahedral 
C)  trigonal bipyramid 
D)  T-shape 
E)  trigonal pyramidal 
A)  trigonal planar 
B)  tetrahedral 
C)  trigonal bipyramid 
D)  T-shape 
E)  trigonal pyramidal D

Question 3

Write a balanced half equation for the following couple: SO42- | S (acidic)

Accepted Answer

A)  SO42-  + 2 H+ + 2e- → S + H2O 
B)  SO42-  + H2O + 4e- → S + 2 H+ 
C)  SO42-  + 2 H+ + 2 e- → S + H2SO4 
D)  SO42- + 8 H+ + 6 e- → S + 4 H2O 
E)  SO42- + 8 H+ → S + 4 H2O + 6 e- 
A)  SO42-  + 2 H+ + 2e- → S + H2O 
B)  SO42-  + H2O + 4e- → S + 2 H+ 
C)  SO42-  + 2 H+ + 2 e- → S + H2SO4 
D)  SO42- + 8 H+ + 6 e- → S + 4 H2O 
E)  SO42- + 8 H+ → S + 4 H2O + 6 e- D

Question 4

Which of the following has the highest boiling point?

Accepted Answer

A)  bromine 
B)  chlorine 
C)  fluorine 
D)  iodine 
E)  astatine 
A)  bromine 
B)  chlorine 
C)  fluorine 
D)  iodine 
E)  astatine

Question 5

Choose the INCORRECT statement.

Accepted Answer

A)  Argon forms compounds readily. 
B)  Argon, xenon, krypton, neon, helium, and radon are called noble gases. 
C)  Liquid helium is used to maintain low temperatures. 
D)  Metals that lose their electrical resistivity are called superconductors. 
E)  Radon is a radioactive element. 
A)  Argon forms compounds readily. 
B)  Argon, xenon, krypton, neon, helium, and radon are called noble gases. 
C)  Liquid helium is used to maintain low temperatures. 
D)  Metals that lose their electrical resistivity are called superconductors. 
E)  Radon is a radioactive element.

Question 6

Given E°red = 1.05 V for XO4-/XO3-, E°red = 1.13 V for XO3-/X2 and E°red = 1.30 V for X2/X-, determine E°red for XO4-/X-.

Accepted Answer

A)  0.435 V 
B)  1.13 V 
C)  3.48 V 
D)  2.05 V 
E)  1.16 V 
A)  0.435 V 
B)  1.13 V 
C)  3.48 V 
D)  2.05 V 
E)  1.16 V

Question 7

Write the chemical equation for the reaction of potassium superoxide with carbon dioxide to produce oxygen.

Accepted Answer

A)  KO(s) + CO2(g) → O2(g) + K(s) + CO(g) 
B)  K2O(s) + CO2(g) → O2(g) + K(s) + KCO(s) 
C)  KO2 + CO2(g) → 2 O2(g) + KC(s) 
D)  2 KO2(s) + 2 CO2(g) → K2CO3(s) + O2(g) 
E)  2 KO2(s) + CO2(g) → K2C(s) + 3O2(g) 
A)  KO(s) + CO2(g) → O2(g) + K(s) + CO(g) 
B)  K2O(s) + CO2(g) → O2(g) + K(s) + KCO(s) 
C)  KO2 + CO2(g) → 2 O2(g) + KC(s) 
D)  2 KO2(s) + 2 CO2(g) → K2CO3(s) + O2(g) 
E)  2 KO2(s) + CO2(g) → K2C(s) + 3O2(g)

Question 8

What is the pH of a solution labeled "0.30 M Hydroxylamine"? [Kb is 9.1 × 10-9]

Accepted Answer

A)  4.38 
B)  6.60 
C)  7.38 
D)  8.23 
E)  9.72 
A)  4.38 
B)  6.60 
C)  7.38 
D)  8.23 
E)  9.72

Question 9

What is the correct completion of the reaction: X2 + OH- → where X is a halogen

Accepted Answer

A)  X2 + 2 OH- → 2 XOH 
B)  X2 + 4 OH- → 2 X(OH)2 
C)  X2 + 2 OH- → XO2 + XH2 
D)  X2 + 2 OH- → OX- + X- + H2O 
E)  X2 + OH- → no reaction 
A)  X2 + 2 OH- → 2 XOH 
B)  X2 + 4 OH- → 2 X(OH)2 
C)  X2 + 2 OH- → XO2 + XH2 
D)  X2 + 2 OH- → OX- + X- + H2O 
E)  X2 + OH- → no reaction

Question 10

Choose the INCORRECT statement.

Accepted Answer

A)  Hydrogen occurs in more compounds than any other element. 
B)  The "water gas" reactions produce combustible gases (CO and H2) from steam and C(s). 
C)  Metallic hydrides are always in fixed ratios of hydrogen to other elements. 
D)  Binary compounds of hydrogen are called hydrides. 
E)  Hydrogenation reactions are hydrogen added to double or triple bonds in presence of a catalyst. 
A)  Hydrogen occurs in more compounds than any other element. 
B)  The "water gas" reactions produce combustible gases (CO and H2) from steam and C(s). 
C)  Metallic hydrides are always in fixed ratios of hydrogen to other elements. 
D)  Binary compounds of hydrogen are called hydrides. 
E)  Hydrogenation reactions are hydrogen added to double or triple bonds in presence of a catalyst.

Question 11

A bleaching solution can be prepared by bubbling chlorine gas through dilute sodium hydroxide: Cl2(g) + 2 OH-(aq) → Cl-(aq) + OCl-(aq) + H2O(l)
The chlorine required may be generated by the electrolysis of molten sodium chloride. What volume of 0.30 M hypochlorite solution could be prepared from the chlorine generated by such electrolysis using a current of 3.0 amp for 25 minutes? Assume 100% efficiency.

Accepted Answer

A)  78 mL 
B)  63 mL 
C)  40 mL 
D)  31 mL 
E)  26 mL 
A)  78 mL 
B)  63 mL 
C)  40 mL 
D)  31 mL 
E)  26 mL

Question 12

The compound of which P4O6 is the anhydride is ________.

Accepted Answer

A)  HPO3 
B)  H3PO4 
C)  H3PO3 
D)  H4P2O7 
E)  H2P2O7 
A)  HPO3 
B)  H3PO4 
C)  H3PO3 
D)  H4P2O7 
E)  H2P2O7

Question 13

What is the correct completion of the reaction: NaF + HC2H3O2 →

Accepted Answer

A)  NaF + HC2H3O2 → NaC2H3 + HFO2 
B)  NaF + HC2H3O2 ⇌ HF + NaC2H3O2 
C)  NaF + HC2H3O2 ⇌ NaC2O2 + H4F 
D)  NaF + HC2H3O2 → NaH3O2 + HFC2 
E)  NaF + HC2H3O2 → no reaction 
A)  NaF + HC2H3O2 → NaC2H3 + HFO2 
B)  NaF + HC2H3O2 ⇌ HF + NaC2H3O2 
C)  NaF + HC2H3O2 ⇌ NaC2O2 + H4F 
D)  NaF + HC2H3O2 → NaH3O2 + HFC2 
E)  NaF + HC2H3O2 → no reaction

Question 14

Which element forms the largest variety of oxoanions?

Accepted Answer

A)  S 
B)  Cl 
C)  P 
D)  Br 
E)  I 
A)  S 
B)  Cl 
C)  P 
D)  Br 
E)  I

Question 15

Which of the following exists in more different allotropic forms than any other element?

Accepted Answer

A)  xenon 
B)  tellurium 
C)  sulfur 
D)  phosphorus 
E)  oxygen 
A)  xenon 
B)  tellurium 
C)  sulfur 
D)  phosphorus 
E)  oxygen

Question 16

One of the natural processes that destroys ozone in the atmosphere is postulated to consist of two steps: O3(g) + UV radiation → O2(g) + O(g)
O3(g) + O(g) → 2 O2(g)
The standard enthalpies of formation for ozone and for atomic oxygen are +142.7 kJ/mol and +249.2 kJ/mol, respectively. What would be the standard energy change associated with the combination of ozone and atomic oxygen to form 50.0 L of molecular oxygen, measured at -75°C and 0.12 atm?

Accepted Answer

A)  -38 kJ 
B)  -72 kJ 
C)  -150 kJ 
D)  -196 kJ 
E)  -600 kJ 
A)  -38 kJ 
B)  -72 kJ 
C)  -150 kJ 
D)  -196 kJ 
E)  -600 kJ

Question 17

In a reaction between XeO3 and Mn2+ that occurred in 324 mL of solution, the gaseous Xe produced occupied a volume of 595 mL at STP. What is the molarity of the MnO4- solution resulting from the reaction? 
9 H2O + 6 Mn2+ + 5 XeO3 → 6 MnO4- + 5 Xe + 18 H+

Accepted Answer

A)  0.0983 M 
B)  0.0683 M 
C)  0.00292 M 
D)  0.0820 M 
E)  0.00203 M 
A)  0.0983 M 
B)  0.0683 M 
C)  0.00292 M 
D)  0.0820 M 
E)  0.00203 M

Question 18

What is the formula for chloric acid?

Accepted Answer

A)  HClO 
B)  HCl 
C)  HClO3 
D)  HClO2 
E)  HClO4 
A)  HClO 
B)  HCl 
C)  HClO3 
D)  HClO2 
E)  HClO4

Question 19

The electron group geometry for XeF2 is ________.

Accepted Answer

A)  trigonal planar 
B)  trigonal bipyramid 
C)  bent 
D)  linear 
E)  trigonal pyramidal 
A)  trigonal planar 
B)  trigonal bipyramid 
C)  bent 
D)  linear 
E)  trigonal pyramidal

Question 20

Choose the INCORRECT statement.

Accepted Answer

A)  Fluorine adopts the -1 oxidation state when it forms compounds. 
B)  In binary compounds with metals, the oxidation state of halogens is -1. 
C)  Halogen ions commonly exhibit a charge of +1. 
D)  Iodine can have oxidation states of +1, +3, +5 and +7 in compounds where iodine is bonded to oxygen and/or fluorine. 
E)  HClO is hypochlorous acid. 
A)  Fluorine adopts the -1 oxidation state when it forms compounds. 
B)  In binary compounds with metals, the oxidation state of halogens is -1. 
C)  Halogen ions commonly exhibit a charge of +1. 
D)  Iodine can have oxidation states of +1, +3, +5 and +7 in compounds where iodine is bonded to oxygen and/or fluorine. 
E)  HClO is hypochlorous acid.

Exam 22: Main Group Elements II: Groups 18, 17, 16, 15, and Hydrogen

Choose the INCORRECT statement.

What is the molecular shape for XeOF2?

Write a balanced half equation for the following couple: SO42- | S (acidic)

Which of the following has the highest boiling point?

Choose the INCORRECT statement.

Given E°red = 1.05 V for XO4-/XO3-, E°red = 1.13 V for XO3-/X2 and E°red = 1.30 V for X2/X-, determine E°red for XO4-/X-.

Write the chemical equation for the reaction of potassium superoxide with carbon dioxide to produce oxygen.

What is the pH of a solution labeled "0.30 M Hydroxylamine"? [Kb is 9.1 × 10-9]

What is the correct completion of the reaction: X2 + OH- → where X is a halogen

Choose the INCORRECT statement.

The compound of which P4O6 is the anhydride is ________.

What is the correct completion of the reaction: NaF + HC2H3O2 →

Which element forms the largest variety of oxoanions?

Which of the following exists in more different allotropic forms than any other element?

In a reaction between XeO3 and Mn2+ that occurred in 324 mL of solution, the gaseous Xe produced occupied a volume of 595 mL at STP. What is the molarity of the MnO4- solution resulting from the reaction? 9 H2O + 6 Mn2+ + 5 XeO3 → 6 MnO4- + 5 Xe + 18 H+

What is the formula for chloric acid?

The electron group geometry for XeF2 is ________.

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

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry 1-41

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

Write a balanced half equation for the following couple: SO₄^2- | S (acidic)

Given E°red = 1.05 V for XO₄^-/XO₃^-, E°red = 1.13 V for XO₃^-/X₂ and E°red = 1.30 V for X₂/X^-, determine E°red for XO₄^-/X^-.

What is the pH of a solution labeled "0.30 M Hydroxylamine"? [Kb is 9.1 × 10^-9]

What is the correct completion of the reaction: X₂ + OH^-→ where X is a halogen

The compound of which P₄O₆ is the anhydride is ________.

What is the correct completion of the reaction: NaF + HC₂H₃O₂ →

In a reaction between XeO₃ and Mn²⁺ that occurred in 324 mL of solution, the gaseous Xe produced occupied a volume of 595 mL at STP. What is the molarity of the MnO₄^- solution resulting from the reaction? 9 H₂O + 6 Mn²⁺ + 5 XeO₃ → 6 MnO₄^- + 5 Xe + 18 H⁺