Question 1

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

Accepted Answer

A)  sulfides
B)  carbonates
C)  hydroxides
D)  bisulfites
E)  none of the aboveF) A) and E)
G) A) and C)

Question 2

What type of a reaction occurs when a silver nitrate solution is mixed with sodium chloride solution?

Accepted Answer

A)  precipitation
B)  acid-base neutralization
C)  oxidation-reduction
D)  gas evolution
E)  no reactionF) All of the above
G) B) and D)

Question 3

Color change is evidence that a chemical reaction has occurred.

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

Which of the following compounds is INSOLUBLE?

Accepted Answer

A)  magnesium phosphate
B)  magnesium sulfate
C)  magnesium iodide
D)  magnesium nitrate
E)  none of the aboveF) C) and E)
G) A) and B)

Question 6

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.F) A) and B)
G) B) and C)

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

A strong electrolyte solution contains ionic compounds that completely dissociate in water.

Accepted Answer

A) True 
 B)False

Question 9

What type of a reaction occurs when a sodium hydroxide solution is mixed with an acetic acid solution?

Accepted Answer

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

Question 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

A)  precipitation
B)  acid-base neutralization
C)  oxidation-reduction
D)  gas evolution
E)  no reactionF) B) and D)
G) All of the above

Question 12

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

Accepted Answer

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

Question 13

A reaction which forms a gaseous product is an example of a(n) ________.

Accepted Answer

A)  oxidation-reduction reaction
B)  combustion reaction
C)  precipitation reaction
D)  gas evolution reaction
E)  none of the aboveF) A) and D)
G) A) and C)

Question 14

Before a chemical equation can be written,one must know

Accepted Answer

A)  the atomic mass of all the elements involved.
B)  the molar mass of all the compounds.
C)  the symbols and formulas of all reactants and products.
D)  the number of moles of all reactants and products.
E)  none of the above.F) C) and D)
G) A) and B)

Question 15

What type of a reaction occurs when a potassium nitrate solution is mixed with a barium acetate solution?

Accepted Answer

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

Question 16

Which of the following is NOT 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.F) C) and D)
G) B) and D)

Question 17

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)

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 3F) A) and E)
G) A) and D)

Question 18

The formation of either a solid or a gas is evidence of a chemical reaction.

Accepted Answer

A) True 
 B)False

Question 19

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 aboveF) C) and E)
G) D) and E)

Question 20

A net ionic equation shows all ionic species that are present in solution.

Accepted Answer

A) True 
 B)False

Exam 7: Chemical Reactions

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

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

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Color change is evidence that a chemical reaction has occurred.

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A net ionic equation shows all ionic species that are present in solution.

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What type of a reaction occurs when a potassium nitrate solution is mixed with a barium acetate solution?

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The formation of either a solid or a gas is evidence of a chemical reaction.

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

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

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Which statement about ozone is TRUE?

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

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What type of reaction is the generic equation AB + CD →\to→ AD + CB?

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Before a chemical equation can be written,one must know

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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)

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A strong electrolyte solution contains ionic compounds that completely dissociate in water.

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What type of a reaction occurs when a sodium hydroxide solution is mixed with an acetic acid solution?

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What type of a reaction occurs when a silver nitrate solution is mixed with sodium chloride solution?

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A reaction which forms a gaseous product is an example of a(n) ________.

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

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

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Which of the following compounds is INSOLUBLE?

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What type of reaction is the generic equation AB + CD $\to$ AD + CB?

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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)

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

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