Question 1

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

Accepted Answer

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

Question 2

The following equation IS balanced: CH4 + 2O2 → CO2 + H2O

Accepted Answer

A) True 
 B)False  False

Question 3

A precipitation reaction occurs when water is formed as a product.

Accepted Answer

A) True 
 B)False  False

Question 4

Which statement about ozone is TRUE?

Accepted Answer

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. 
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.

Question 5

What is the molecular equation for the reaction of hydrochloric acid with potassium hydroxide?

Accepted Answer

A) H2Cl + 2KOH → H2O +2KCl 
B) 2HCl + K(OH)2 → 2H2O + KCl2 
C) H+ + OH- → H2O 
D) HCl + KOH → H2O + KCl 
E) none of the above 
A) H2Cl + 2KOH → H2O +2KCl 
B) 2HCl + K(OH)2 → 2H2O + KCl2 
C) H+ + OH- → H2O 
D) HCl + KOH → H2O + KCl 
E) none of the above

Question 6

Considering the following precipitation reaction: 
Pb(NO3)2(aq)+ 2KI(aq)→ PbI2(s)+ 2KNO3(aq)
What is the correct complete ionic equation?

Accepted Answer

A) Pb2+ + (NO3)2- + 2K+ + 2I- → PbI2(s)+ 2K+ + 2NO3- 
B) Pb2+ + 2NO3- +2K+ + I- → PbI2(s)+ 2K+ + NO3- 
C) Pb2+ + 2NO3- + 2K+ + 2I- → PbI2(s)+ 2K+ + 2NO3- 
D) Pb2+ + 2NO3- + 2K+ + 2I- → Pb2+ + 2I- + 2K+ + 2NO3- 
E) none of the above 
A) Pb2+ + (NO3)2- + 2K+ + 2I- → PbI2(s)+ 2K+ + 2NO3- 
B) Pb2+ + 2NO3- +2K+ + I- → PbI2(s)+ 2K+ + NO3- 
C) Pb2+ + 2NO3- + 2K+ + 2I- → PbI2(s)+ 2K+ + 2NO3- 
D) Pb2+ + 2NO3- + 2K+ + 2I- → Pb2+ + 2I- + 2K+ + 2NO3- 
E) none of the above

Question 7

Cl-,Br-,and I- are mostly insoluble.

Accepted Answer

A) True 
 B)False

Question 8

Considering the following precipitation reaction: 
Pb(NO3)2(aq)+ 2KI(aq)→ PbI2(s)+ 2KNO3(aq)
Which ion(s)would NOT be present in the net ionic equation?

Accepted Answer

A) Pb2+,NO3- 
B) K+,NO3- 
C) K+, Pb2+ 
D) K+, I- 
E) All the above ions are in the net ionic equation. 
A) Pb2+,NO3- 
B) K+,NO3- 
C) K+, Pb2+ 
D) K+, I- 
E) All the above ions are in the net ionic equation.

Question 9

What are the coefficients for the following reaction when it is properly balanced? ___Na3PO4 + ___Ba(NO3)2 → ___NaNO3 + ___Ba3(PO4)2

Accepted Answer

A) 2,1,1,3 
B) 2,3,1,6 
C) 2,3,6,1 
D) 6,1,3,2 
E) none of the above 
A) 2,1,1,3 
B) 2,3,1,6 
C) 2,3,6,1 
D) 6,1,3,2 
E) none of the above

Question 10

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

Accepted Answer

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 
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

Question 11

We remove the spectator ions from the complete ionic equation to form the net ionic equation.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

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

Question 13

Which of the following is NOT typically a sign of a chemical reaction?

Accepted Answer

A) absorbing heat when chemicals are contacted with each other 
B) emission of heat when chemicals are contacted with each other 
C) emission of light when chemicals are contacted with each other 
D) absorbing light when chemicals are contacted with each other 
E) All of the above are signs of a chemical reaction. 
A) absorbing heat when chemicals are contacted with each other 
B) emission of heat when chemicals are contacted with each other 
C) emission of light when chemicals are contacted with each other 
D) absorbing light when chemicals are contacted with each other 
E) All of the above are signs of a chemical reaction.

Question 14

When the equation __NO2 + __H2O + __O2 → __HNO3 is balanced,the coefficient of HNO3 is:

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) none of the above 
A) 2 
B) 3 
C) 4 
D) 5 
E) none of the above

Question 15

A spectator ion is one that does not actively participate in a chemical reaction.

Accepted Answer

A) True 
 B)False

Question 16

Carbon dioxide gas is a product when an acid reacts with a carbonate or a bicarbonate.

Accepted Answer

A) True 
 B)False

Question 17

What type of reaction is the generic equation   ?

Accepted Answer

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

Question 18

A reaction in which a substance reacts with oxygen,emitting heat and forming oxygen-containing compounds is an example of a(n):

Accepted Answer

A) acid-base reaction. 
B) combustion reaction. 
C) precipitation reaction. 
D) gas evolution reaction. 
E) none of the above 
A) acid-base reaction. 
B) combustion reaction. 
C) precipitation reaction. 
D) gas evolution reaction. 
E) none of the above

Question 19

The reaction 2 KClO3 → 2 KCl + 3 O2 would be correctly classified as a decomposition reaction.

Accepted Answer

A) True 
 B)False

Question 20

Mixing two aqueous solutions will always result in formation of a precipitate.

Accepted Answer

A) True 
 B)False

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

The following equation IS balanced: CH₄ + 2O₂ → CO₂ + H₂O

A precipitation reaction occurs when water is formed as a product.

Which statement about ozone is TRUE?

What is the molecular equation for the reaction of hydrochloric acid with potassium hydroxide?

Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+ 2KNO₃(aq) What is the correct complete ionic equation?

Cl^-,Br^-,and I^- are mostly insoluble.

Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+ 2KNO₃(aq) Which ion(s)would NOT be present in the net ionic equation?

What are the coefficients for the following reaction when it is properly balanced? _Na₃PO₄ + _Ba(NO₃)₂→ _NaNO₃ + _Ba₃(PO₄)₂

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

We remove the spectator ions from the complete ionic equation to form the net ionic equation.

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

Which of the following is NOT typically a sign of a chemical reaction?

When the equation NO₂ + H₂O + O₂ → HNO₃ is balanced,the coefficient of HNO₃ is:

A spectator ion is one that does not actively participate in a chemical reaction.

Carbon dioxide gas is a product when an acid reacts with a carbonate or a bicarbonate.

What type of reaction is the generic equation ?

A reaction in which a substance reacts with oxygen,emitting heat and forming oxygen-containing compounds is an example of a(n):

The reaction 2 KClO₃ → 2 KCl + 3 O₂ would be correctly classified as a decomposition reaction.

Mixing two aqueous solutions will always result in formation of a precipitate.

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Exam 7: Chemical Reactions

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

The following equation IS balanced: CH4 + 2O2 → CO2 + H2O

A precipitation reaction occurs when water is formed as a product.

Which statement about ozone is TRUE?

What is the molecular equation for the reaction of hydrochloric acid with potassium hydroxide?

Considering the following precipitation reaction: Pb(NO3)2(aq)+ 2KI(aq)→ PbI2(s)+ 2KNO3(aq) What is the correct complete ionic equation?

Cl-,Br-,and I- are mostly insoluble.

Considering the following precipitation reaction: Pb(NO3)2(aq)+ 2KI(aq)→ PbI2(s)+ 2KNO3(aq) Which ion(s)would NOT be present in the net ionic equation?

What are the coefficients for the following reaction when it is properly balanced? ___Na3PO4 + ___Ba(NO3)2 → ___NaNO3 + ___Ba3(PO4)2

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

We remove the spectator ions from the complete ionic equation to form the net ionic equation.

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

Which of the following is NOT typically a sign of a chemical reaction?

When the equation __NO2 + __H2O + __O2 → __HNO3 is balanced,the coefficient of HNO3 is:

A spectator ion is one that does not actively participate in a chemical reaction.

Carbon dioxide gas is a product when an acid reacts with a carbonate or a bicarbonate.

What type of reaction is the generic equation ?

A reaction in which a substance reacts with oxygen,emitting heat and forming oxygen-containing compounds is an example of a(n):

The reaction 2 KClO3 → 2 KCl + 3 O2 would be correctly classified as a decomposition reaction.

Mixing two aqueous solutions will always result in formation of a precipitate.

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Molecules and Compounds

Chemical Composition

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

The following equation IS balanced: CH₄ + 2O₂ → CO₂ + H₂O

Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+ 2KNO₃(aq) What is the correct complete ionic equation?

Cl^-,Br^-,and I^- are mostly insoluble.

Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+ 2KNO₃(aq) Which ion(s)would NOT be present in the net ionic equation?

What are the coefficients for the following reaction when it is properly balanced? _Na₃PO₄ + _Ba(NO₃)₂→ _NaNO₃ + _Ba₃(PO₄)₂

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

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

When the equation NO₂ + H₂O + O₂ → HNO₃ is balanced,the coefficient of HNO₃ is:

The reaction 2 KClO₃ → 2 KCl + 3 O₂ would be correctly classified as a decomposition reaction.