When the equation, ___O2 + ___C6 H14 ? ___CO2 + ___H2O is balanced, the coefficient of O2 is:

When the equation, ___O2 + ___C6 H14 ? ___CO2 + ___H2O is balanced, the coefficient of O2 is:

A) 3
B) 10
C) 19
D) 38
E) none of the above

Answer: C

The mixing of sodium metal and chlorine gas would be the type of reaction known as:

The mixing of sodium metal and chlorine gas would be the type of reaction known as:

A) oxidation-reduction
B) gas evolution
C) neutralization
D) precipitation
E) none of the above

Answer: A

Which statement about ozone is TRUE?

Which statement about ozone is TRUE?

A) Ozone normally forms in the upper atmosphere.
B) Chlorofluorocarbons deplete the ozone layer.
C) Ozone protects life on Earth from harmful ultraviolet light.
D) None of the above statements are true.
E) All the of the first three statements are true.

Answer: E

Identify the double displacement reactions among the following:

Identify the double displacement reactions among the following:

1. KCl(aq) + AgNO3(aq) ? AgCl(s) + KNO3(aq)
2. Na2SO4(aq) + BaCl2(aq) ? BaSO4(s) + 2NaCl(aq)
3. H2SO4((aq) + 2NaOH(aq) ? Na2SO4((aq) + 2H2O(l)


A) 1 and 2 only
B) 1 and 3 only
C) 2 and 3 only
D) All of 1, 2, and 3
E) None of 1, 2, and 3

Answer: D

What must be supplied for a decomposition reaction to happen?

What must be supplied for a decomposition reaction to happen?

A) energy
B) heat
C) electrical current
D) light
E) any of the above

Answer: E

What type of reaction is the generic equation AB > A+B?

What type of reaction is the generic equation AB > A+B?

A) synthesis/combination
B) decomposition
C) single displacement
D) double-displacement
E) none of the above

Answer: B

What type of reaction is the generic equation AB + CD > AD + CB?

What type of reaction is the generic equation AB + CD > AD + CB?

A) synthesis/combination
B) decomposition
C) single displacement
D) double-displacement
E) none of the above

Answer: D

What type of reaction is the generic equation A + BC ? AC + B?

What type of reaction is the generic equation A + BC ? AC + B?

A) synthesis/combination
B) decomposition
C) single displacement
D) double-displacement
E) none of the above

Answer: C

What type of reaction is the generic equation A + B > AB?

What type of reaction is the generic equation A + B > AB?

A) synthesis/combination
B) decomposition
C) single displacement
D) double-displacement
E) none of the above

Answer: A

The reaction CH4 (g) + 2 O2 (g) ? CO2 (g) + 2 H2O (g) is:

The reaction CH4 (g) + 2 O2 (g) ? CO2 (g) + 2 H2O (g) is:

A) a combustion reaction.
B) a redox reaction.
C) an exothermic reaction.
D) all of the above
E) none of the above

Answer: D

Which of the following statements about redox reactions is FALSE?

Which of the following statements about redox reactions is FALSE?

A) Oxidation is the loss of electrons.
B) Reduction is the gain of electrons.
C) A reaction can result in either oxidation or reduction, not both.
D) A reaction involving elemental oxygen is a redox reaction.
E) All of the above statement are true.

Answer: C

A redox reaction has occurred ________.

A redox reaction has occurred ________.

A) when a substance reacts with elemental oxygen
B) when an alkali metal reacts with an alkaline earth metal
C) when one substance transfers protons to another
D) when one substance forms a solid
E) when all of the above occur

Answer: A

Methane gas (CH4), on complete combustion in air, produces:

Methane gas (CH4), on complete combustion in air, produces:

1. CO2
2. H2
3. H2O



A) 1 and 2 only
B) 1 and 3 only
C) 2 and 3 only
D) All of 1 and 2 only
E) None

Answer: B

Identify the oxidation-reduction reactions among the following:

Identify the oxidation-reduction reactions among the following:

1. Zn(s) + Cu2+(aq) ? Zn2+(aq) + Cu(s)
2. 2 Na(s) + Cl2(aq) ? 2NaCl(s)
3. 2 Mg(s) + O2(g) ? 2 MgO


A) 1 and 2 only
B) 1 and 3 only
C) 2 and 3 only
D) All of 1, 2, and 3
E) None of 1, 2, and 3


Answer: D

What type of a reaction occurs when potassium metal reacts with fluorine gas?

What type of a reaction occurs when potassium metal reacts with fluorine gas?

A) precipitation
B) acid-base neutralization
C) oxidation-reduction
D) gas evolution
E) no reaction

Answer: C

As defined in the text, identify the "gas evolution" reactions among the following:

As defined in the text, identify the "gas evolution" reactions among the following:

1. 2HCl(aq) + K2CO3(aq) ? H2O(l) + CO2(g) + 2KCl(aq)
2. CH4(g) + 2O2(g) ? CO2(g) + 2H2O(l)
3. 2HCl(aq) + K2S(aq) ? H2S(g) + 2KCl(aq)


A) 1 and 2 only
B) 1 and 3 only
C) 2 and 3 only
D) All of 1, 2, and 3
E) None of 1, 2, and 3

Answer: B

Which of the following would NOT be a product from mixing hydrochloric acid with a solution of sodium sulfite?

Which of the following would NOT be a product from mixing hydrochloric acid with a solution of sodium sulfite?

A) H2O (l)
B) SO2 (g)
C) NaCl (aq)
D) H2 (g)
E) none of the above

Answer: D

What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution?

What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution?

A) precipitation
B) acid-base neutralization
C) oxidation-reduction
D) gas evolution
E) no reaction

Answer: D

What is the gas produced when hydrochloric acid is reacted with ammonium carbonate?

What is the gas produced when hydrochloric acid is reacted with ammonium carbonate?

A) ammonia
B) chlorine
C) hydrogen
D) carbon dioxide
E) none of the above

Answer: D

Which of the following types of compounds will NOT undergo a gas evolution reaction when acid is added?

Which of the following types of compounds will NOT undergo a gas evolution reaction when acid is added?

A) sulfides
B) carbonates
C) hydroxides
D) bisulfites
E) none of the above

Answer: C