Question 1

Using VSEPR theory, which of the following descriptions of probable molecular geometry is INCORRECT?

Accepted Answer

A)  SF6/octahedral 
B)  SiCl4/tetrahedral 
C)  BF3/trigonal planar 
D)  SnCl4/tetrahedral 
E)  ClF3/pyramidal 
A)  SF6/octahedral 
B)  SiCl4/tetrahedral 
C)  BF3/trigonal planar 
D)  SnCl4/tetrahedral 
E)  ClF3/pyramidal

Question 2

Choose the INCORRECT statement.

Accepted Answer

A)  Eutrophication is the process by which a freshwater body becomes filled with algae and depleted of fish. 
B)  Eutrophication can be hastened by phosphate fertilizers. 
C)  P3H is phosphine. 
D)  Carbon has the allotropes, graphite and diamond. 
E)  Graphite can be used as a lubricant because layers of molecules slide over other layers of molecules. 
A)  Eutrophication is the process by which a freshwater body becomes filled with algae and depleted of fish. 
B)  Eutrophication can be hastened by phosphate fertilizers. 
C)  P3H is phosphine. 
D)  Carbon has the allotropes, graphite and diamond. 
E)  Graphite can be used as a lubricant because layers of molecules slide over other layers of molecules.

Question 3

Oxygen is obtained commercially from air by fractional distillation.

Accepted Answer

A) True 
 B)False

Question 4

How much hydrogen (in liters at STP) is required to change 857 kg of diisobutylene to isooctane? Molar mass of diisobutylene is 112.2 grams. CH3C(CH3)2CH=C(CH3)2 + H2 → CH3C(CH3)2CH2CH(CH3)2

Accepted Answer

A)  15.4 L 
B)  1.71 × 105 L 
C)  8.55 × 104 L 
D)  3.42 × 105 L 
E)  30.8 L 
A)  15.4 L 
B)  1.71 × 105 L 
C)  8.55 × 104 L 
D)  3.42 × 105 L 
E)  30.8 L

Question 5

How much H2 (in liters) is produced at 45 °C and 770. torr by the reaction of 45.7 g of zinc? 
Zn(s) + 2 H+(aq) → Zn2+(aq) + H2(g)

Accepted Answer

A)  139 L 
B)  15.7 L 
C)  18.0 L 
D)  31.4 L 
E)  11.8 L 
A)  139 L 
B)  15.7 L 
C)  18.0 L 
D)  31.4 L 
E)  11.8 L

Question 6

What is the molecular shape for XeF2?

Accepted Answer

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

Question 7

Define "hydrogenation reaction".

Accepted Answer

A)  Hydrogen is produced chemically. 
B)  Double bonds are formed by removing hydrogen. 
C)  Hydrogen is removed from water. 
D)  Hydrogen is separated from other gases in air. 
E)  Hydrogen is added to carbon-carbon multiple bonds such that the bond order is reduced in the final product. 
A)  Hydrogen is produced chemically. 
B)  Double bonds are formed by removing hydrogen. 
C)  Hydrogen is removed from water. 
D)  Hydrogen is separated from other gases in air. 
E)  Hydrogen is added to carbon-carbon multiple bonds such that the bond order is reduced in the final product.

Question 8

Choose the INCORRECT statement.

Accepted Answer

A)  Oleum is SO3(g) dissolved in H2SO4. 
B)  Oleum is called fuming sulfuric acid. 
C)  Sulfuric and sulfurous acids are monoprotic. 
D)  Acid salts are compounds formed from polyprotic acids by neutralizing one hydrogen. 
E)  Thio in a name denotes that one oxygen is replaced by a sulfur. 
A)  Oleum is SO3(g) dissolved in H2SO4. 
B)  Oleum is called fuming sulfuric acid. 
C)  Sulfuric and sulfurous acids are monoprotic. 
D)  Acid salts are compounds formed from polyprotic acids by neutralizing one hydrogen. 
E)  Thio in a name denotes that one oxygen is replaced by a sulfur.

Question 9

Write a balanced half equation for the following couple: HClO2 | Cl- (acidic)

Accepted Answer

A)  HClO2 + 2 H2O → Cl- + 3 H+ + 4 e- 
B)  HClO2 + 2 H+ + 2 e- → Cl- + H2O 
C)  HClO2 + 3 H+ + 4 e- → Cl- + 2 H2O 
D)  HClO2 + 3 H+ → Cl- + H2O + 4 e- 
E)  HClO2 + e- → Cl- + H+ + O2 
A)  HClO2 + 2 H2O → Cl- + 3 H+ + 4 e- 
B)  HClO2 + 2 H+ + 2 e- → Cl- + H2O 
C)  HClO2 + 3 H+ + 4 e- → Cl- + 2 H2O 
D)  HClO2 + 3 H+ → Cl- + H2O + 4 e- 
E)  HClO2 + e- → Cl- + H+ + O2

Question 10

Ozone and "ordinary" oxygen are examples of:

Accepted Answer

A)  allotropes 
B)  isotopes 
C)  isomers 
D)  phalaropes 
E)  tropomers 
A)  allotropes 
B)  isotopes 
C)  isomers 
D)  phalaropes 
E)  tropomers

Question 11

Choose the INCORRECT statement.

Accepted Answer

A)  Hydroxylammine, NH2OH, is a weak acid. 
B)  Laughing gas, an anesthetic used in dentistry, is N2O. 
C)  Nitrogen forms oxides with oxidation states that range between +1 and +5. 
D)  Azides contain the N3- ion. 
E)  An acid anhydride reacts with water to form an acid. 
A)  Hydroxylammine, NH2OH, is a weak acid. 
B)  Laughing gas, an anesthetic used in dentistry, is N2O. 
C)  Nitrogen forms oxides with oxidation states that range between +1 and +5. 
D)  Azides contain the N3- ion. 
E)  An acid anhydride reacts with water to form an acid.

Question 12

What is the main commercial source of nitrogen?

Accepted Answer

A)  fractional distillation of liquid air 
B)  chemical reaction from NH3 
C)  chemical reaction from HNO3 
D)  from lightning or electrical motors 
E)  separated from air by chemical traps 
A)  fractional distillation of liquid air 
B)  chemical reaction from NH3 
C)  chemical reaction from HNO3 
D)  from lightning or electrical motors 
E)  separated from air by chemical traps

Question 13

What is the correct completion of the reaction: IO3- + HSO3- →

Accepted Answer

A)  IO3- + 3 HSO3- → I- + 3 SO42-+ 3 H+ 
B)  IO3- + HSO3- → IO2- + HSO4- 
C)  2 IO3- + 3 HSO3- → I2 + HSO4-+ O3- 
D)  IO3- + HSO3- → IO4- + HSO2- 
E)  IO3- + 2 HSO3- → S2I + H2O + 4 O2 
A)  IO3- + 3 HSO3- → I- + 3 SO42-+ 3 H+ 
B)  IO3- + HSO3- → IO2- + HSO4- 
C)  2 IO3- + 3 HSO3- → I2 + HSO4-+ O3- 
D)  IO3- + HSO3- → IO4- + HSO2- 
E)  IO3- + 2 HSO3- → S2I + H2O + 4 O2

Question 14

On the average, air contains about 9.3 mL of argon per liter. What would be the partial pressure of argon in air when the barometric pressure is 780 torr?

Accepted Answer

A)  84 torr 
B)  7.3 torr 
C)  780 torr 
D)  770 torr 
E)  790 torr 
A)  84 torr 
B)  7.3 torr 
C)  780 torr 
D)  770 torr 
E)  790 torr

Question 15

Give the molecular shape of NO3-.

Accepted Answer

A)  trigonal pyramidal 
B)  trigonal planar 
C)  tetrahedral 
D)  linear 
E)  octahedral 
A)  trigonal pyramidal 
B)  trigonal planar 
C)  tetrahedral 
D)  linear 
E)  octahedral

Question 16

Nitrogen is obtained from air by fractional distillation.

Accepted Answer

A) True 
 B)False

Question 17

What volume of 17 M nitric acid is required to dissolve 15 g of copper by a reaction for which the products are aqueous copper(II) nitrate, nitric oxide gas, and water? Assume 100% reaction.

Accepted Answer

A)  93 mL 
B)  79 mL 
C)  53 mL 
D)  37 mL 
E)  21 mL 
A)  93 mL 
B)  79 mL 
C)  53 mL 
D)  37 mL 
E)  21 mL

Question 18

Choose the INCORRECT statement.

Accepted Answer

A)  Acid anhydrides plus water generate an acid. 
B)  H5P3O10 is diphosphoric acid or pyrophosphoric acid. 
C)  H3PO3 is phosphorous acid. 
D)  H3PO4 is phosphoric acid. 
E)  Phosphorus is very important in biochemistry as ADP and ATP. 
A)  Acid anhydrides plus water generate an acid. 
B)  H5P3O10 is diphosphoric acid or pyrophosphoric acid. 
C)  H3PO3 is phosphorous acid. 
D)  H3PO4 is phosphoric acid. 
E)  Phosphorus is very important in biochemistry as ADP and ATP.

Question 19

Choose the INCORRECT statement.

Accepted Answer

A)  Industrial smog consists of ash, smoke, SO2(g) and H2SO4 mist. 
B)  Group 15 (5
A)  is interesting because it has both nonmetals and metals in the family. 
C)  The Group 15 (5
A)  electron configuration is ns2np3. 
D)  As, Sb, and Si occur in the -3 oxidation state. 
E)  P, Ar and Sb exhibit allotropy. 
A)  Industrial smog consists of ash, smoke, SO2(g) and H2SO4 mist. 
B)  Group 15 (5
A)  is interesting because it has both nonmetals and metals in the family. 
C)  The Group 15 (5
A)  electron configuration is ns2np3. 
D)  As, Sb, and Si occur in the -3 oxidation state. 
E)  P, Ar and Sb exhibit allotropy.

Question 20

Choose the INCORRECT name/formula combination.

Accepted Answer

A)  dinitrogen pentoxide / N2O5 
B)  nitrogen monoxide / NO 
C)  nitrogen dioxide / N2O2 
D)  dinitrogen monoxide / N2O 
E)  nitric acid / HNO3 
A)  dinitrogen pentoxide / N2O5 
B)  nitrogen monoxide / NO 
C)  nitrogen dioxide / N2O2 
D)  dinitrogen monoxide / N2O 
E)  nitric acid / HNO3

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

Using VSEPR theory, which of the following descriptions of probable molecular geometry is INCORRECT?

Choose the INCORRECT statement.

Oxygen is obtained commercially from air by fractional distillation.

How much hydrogen (in liters at STP) is required to change 857 kg of diisobutylene to isooctane? Molar mass of diisobutylene is 112.2 grams. CH3C(CH3)2CH=C(CH3)2 + H2 → CH3C(CH3)2CH2CH(CH3)2

How much H2 (in liters) is produced at 45 °C and 770. torr by the reaction of 45.7 g of zinc? Zn(s) + 2 H+(aq) → Zn2+(aq) + H2(g)

What is the molecular shape for XeF2?

Define "hydrogenation reaction".

Choose the INCORRECT statement.

Write a balanced half equation for the following couple: HClO2 | Cl- (acidic)

Ozone and "ordinary" oxygen are examples of:

Choose the INCORRECT statement.

What is the main commercial source of nitrogen?

What is the correct completion of the reaction: IO3- + HSO3- →

On the average, air contains about 9.3 mL of argon per liter. What would be the partial pressure of argon in air when the barometric pressure is 780 torr?

Give the molecular shape of NO3-.

Nitrogen is obtained from air by fractional distillation.

What volume of 17 M nitric acid is required to dissolve 15 g of copper by a reaction for which the products are aqueous copper(II) nitrate, nitric oxide gas, and water? Assume 100% reaction.

Choose the INCORRECT statement.

Choose the INCORRECT statement.

Choose the INCORRECT name/formula combination.

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

How much hydrogen (in liters at STP) is required to change 857 kg of diisobutylene to isooctane? Molar mass of diisobutylene is 112.2 grams. CH₃C(CH₃)₂CH=C(CH₃)₂ + H₂ → CH₃C(CH₃)₂CH₂CH(CH₃)₂

How much H₂ (in liters) is produced at 45 °C and 770. torr by the reaction of 45.7 g of zinc? Zn(s) + 2 H+(aq) → Zn₂+(aq) + H₂(g)

Write a balanced half equation for the following couple: HClO₂ | Cl- (acidic)

What is the correct completion of the reaction: IO₃^- + HSO₃^- →

Give the molecular shape of NO₃^-.