Question 1

Which of the following equations correctly represents the combustion of hydrazine?

Accepted Answer

A) N2H4 (l) + O2 (g) → NH3 (g) + HNO2 (g) 
B) N2H4 (l) + 2O2 (g) → 2NO2 (g) + 2H2 (g) 
C) N2H4 (l) + O2 (g) → 2H2NO (g) 
D) N2H4 (l) + O2 (g) → N2 (g) + 2 H2O (g) 
E) N2H4 (l) + O2 (g) → N2 (g) + 2H2 (g) + O2 (g) 
A) N2H4 (l) + O2 (g) → NH3 (g) + HNO2 (g) 
B) N2H4 (l) + 2O2 (g) → 2NO2 (g) + 2H2 (g) 
C) N2H4 (l) + O2 (g) → 2H2NO (g) 
D) N2H4 (l) + O2 (g) → N2 (g) + 2 H2O (g) 
E) N2H4 (l) + O2 (g) → N2 (g) + 2H2 (g) + O2 (g)

Question 2

The oxidation number of N in HNO3 is ________.

Accepted Answer

A) +1 
B) +2 
C) +3 
D) +4 
E) +5 
A) +1 
B) +2 
C) +3 
D) +4 
E) +5

Question 3

Chlorine can have a positive oxidation state ________.

Accepted Answer

A) if it combines with bromine or iodine 
B) if it combines with oxygen or fluorine 
C) if it combines with hydrogen 
D) if it combines with an alkali metal 
E) in its elemental form 
A) if it combines with bromine or iodine 
B) if it combines with oxygen or fluorine 
C) if it combines with hydrogen 
D) if it combines with an alkali metal 
E) in its elemental form

Question 4

A carbonyl compound contains ________.

Accepted Answer

A) a carbon-oxygen double bond 
B) a carbon-oxygen triple bond 
C) a carbon atom with a lone pair of electrons 
D) a carbon-carbon triple bond 
E) a carbon-carbon double bond 
A) a carbon-oxygen double bond 
B) a carbon-oxygen triple bond 
C) a carbon atom with a lone pair of electrons 
D) a carbon-carbon triple bond 
E) a carbon-carbon double bond

Question 5

Which of the following react with oxygen to form superoxides?

Accepted Answer

A) Ca 
B) Na 
C) K 
D) Sr 
E) Ba 
A) Ca 
B) Na 
C) K 
D) Sr 
E) Ba

Question 6

What method is used to produce the most hydrogen gas in the United States?

Accepted Answer

A) electrolysis of water 
B) reaction of zinc with acid 
C) reaction of methane with steam 
D) reaction of coke (carbon)with steam 
E) reaction of metallic sodium with water 
A) electrolysis of water 
B) reaction of zinc with acid 
C) reaction of methane with steam 
D) reaction of coke (carbon)with steam 
E) reaction of metallic sodium with water

Question 7

Interhalogen compounds ________.

Accepted Answer

A) are exceedingly reactive 
B) contain halogens in both positive and negative oxidation states 
C) are powerful oxidizing agents 
D) that contain fluorine are very active fluorinating agents 
E) all of the above 
A) are exceedingly reactive 
B) contain halogens in both positive and negative oxidation states 
C) are powerful oxidizing agents 
D) that contain fluorine are very active fluorinating agents 
E) all of the above

Question 8

What are the principal components used in making soda-lime glass?

Accepted Answer

calcium ox

Question 9

How many pairs of unpaired electrons are there in one molecule of dinitrogen monoxide?

Accepted Answer

A) 4 
B) 3 
C) 5 
D) 2 
E) 1 
A) 4 
B) 3 
C) 5 
D) 2 
E) 1

Question 10

The least electronegative of the elements below is ________.

Accepted Answer

A) Se 
B) S 
C) F 
D) Cl 
E) Br 
A) Se 
B) S 
C) F 
D) Cl 
E) Br

Question 11

________ is formed when wood is heated strongly in the absence of air.

Accepted Answer

A) Buckminsterfullerene 
B) Carbon black 
C) Sulfur dioxide 
D) Coke 
E) Charcoal 
A) Buckminsterfullerene 
B) Carbon black 
C) Sulfur dioxide 
D) Coke 
E) Charcoal

Question 12

Which of the following would produce the most strongly basic aqueous solution?

Accepted Answer

A) CO 
B) CO32- 
C) CO2 
D) HCO3- 
E) NaHCO3 
A) CO 
B) CO32- 
C) CO2 
D) HCO3- 
E) NaHCO3

Question 13

Which one of the following is false concerning tritium?

Accepted Answer

A) It is radioactive, emitting alpha particles with a half-life of 12.3 yr. 
B) It can be produced by neutron bombardment of lithium-6. 
C) It is formed continuously in the upper atmosphere. 
D) It has the same chemical properties as protium but reacts more slowly. 
E) The atomic number of tritium is 1. 
A) It is radioactive, emitting alpha particles with a half-life of 12.3 yr. 
B) It can be produced by neutron bombardment of lithium-6. 
C) It is formed continuously in the upper atmosphere. 
D) It has the same chemical properties as protium but reacts more slowly. 
E) The atomic number of tritium is 1.

Question 14

The disilicate ion is ________.

Accepted Answer

A) Si2O88- 
B) Si2O76- 
C) Si2O84- 
D) Si2O86- 
E) Si2O72- 
A) Si2O88- 
B) Si2O76- 
C) Si2O84- 
D) Si2O86- 
E) Si2O72-

Question 15

Which element in group 6A is not found as the central atom in compounds with an expanded valence shell?

Accepted Answer

A) oxygen 
B) selenium 
C) tellurium 
D) polonium 
E) sulfur 
A) oxygen 
B) selenium 
C) tellurium 
D) polonium 
E) sulfur

Question 16

The oxidation numbers of sulfur in the sulfate ion, sulfite ion, sulfur trioxide, and hydrogen sulfide are ________, ________, ________, and ________, respectively.

Accepted Answer

A) +4, -2, +4, +6 
B) +6, +2, +4, +6 
C) +6, +4, +6, -2 
D) +4, +6, +4, -2 
E) -2, +6, -2, 0 
A) +4, -2, +4, +6 
B) +6, +2, +4, +6 
C) +6, +4, +6, -2 
D) +4, +6, +4, -2 
E) -2, +6, -2, 0

Question 17

Carbon dioxide is produced ________.

Accepted Answer

A) in blast furnaces when metal oxides are reduced with CO 
B) by combustion of carbon-containing substances in an excess of oxygen 
C) when carbonates are heated 
D) by fermentation of sugar during the production of ethanol 
E) by all of the above processes 
A) in blast furnaces when metal oxides are reduced with CO 
B) by combustion of carbon-containing substances in an excess of oxygen 
C) when carbonates are heated 
D) by fermentation of sugar during the production of ethanol 
E) by all of the above processes

Question 18

What is the F-Xe-F bond angle in XeF2?

Accepted Answer

A) 180° 
B) 90° 
C) 109.5° 
D) 120° 
E) 60° 
A) 180° 
B) 90° 
C) 109.5° 
D) 120° 
E) 60°

Question 19

Astatine decays by ________.

Accepted Answer

The answer of Astatine decays by ________....

Question 20

Which one of the following compounds is superoxide?

Accepted Answer

A) NaO2 
B) Na2O 
C) Na2O2 
D) NaOH 
E) H2O 
A) NaO2 
B) Na2O 
C) Na2O2 
D) NaOH 
E) H2O

Exam 22: Chemistry of the Nonmetals

Which of the following equations correctly represents the combustion of hydrazine?

The oxidation number of N in HNO3 is ________.

Chlorine can have a positive oxidation state ________.

A carbonyl compound contains ________.

Which of the following react with oxygen to form superoxides?

What method is used to produce the most hydrogen gas in the United States?

Interhalogen compounds ________.

What are the principal components used in making soda-lime glass?

How many pairs of unpaired electrons are there in one molecule of dinitrogen monoxide?

The least electronegative of the elements below is ________.

________ is formed when wood is heated strongly in the absence of air.

Which of the following would produce the most strongly basic aqueous solution?

Which one of the following is false concerning tritium?

The disilicate ion is ________.

Which element in group 6A is not found as the central atom in compounds with an expanded valence shell?

The oxidation numbers of sulfur in the sulfate ion, sulfite ion, sulfur trioxide, and hydrogen sulfide are ________, ________, ________, and ________, respectively.

Carbon dioxide is produced ________.

What is the F-Xe-F bond angle in XeF2?

Astatine decays by ________.

Which one of the following compounds is superoxide?

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

The oxidation number of N in HNO₃ is ________.

The oxidation numbers of sulfur in the sulfate ion, sulfite ion, sulfur trioxide, and hydrogen sulfide are , , , and , respectively.

What is the F-Xe-F bond angle in XeF₂?