Deck 6: Chemical Reactions

Question 1

Which equation would be described as a single displacement reaction?

A) 2 CO + O₂ $\rightarrow$ 2 CO₂
B) CuCO₃ $\rightarrow$ CuO + CO₂
C) 2 AgNO₃ + Na₂CrO₄ $\rightarrow$ Ag₂CrO₄ + 2 NaNO₃
D) Zn + Cu(NO₃)₂ $\rightarrow$ Zn(NO₃)₂ + Cu

Answer 1

Zn + Cu(NO₃)₂ $\rightarrow$ Zn(NO₃)₂ + Cu

Question 2

Which equation would be described as a synthesis (combination) reaction?

A) 2 CO + O₂ $\rightarrow$ 2 CO₂
B) CuCO₃ $\rightarrow$ CuO + CO₂
C) 2 AgNO₃ + Na₂CrO₄ $\rightarrow$ Ag₂CrO₄ + 2 NaNO₃
D) Zn + Cu(NO₃)₂ $\rightarrow$ Zn(NO₃)₂ + Cu

Answer 2

2 CO + O₂ $\rightarrow$ 2 CO₂

Question 3

When heated, iron and sulfur combine to form a new compound, iron(II) sulfide. In this reaction:

A) both Fe and S are oxidized.
B) both Fe and S are reduced.
C) Fe is oxidized and S is reduced.
D) S is oxidized and Fe is reduced.

Answer 3

Fe is oxidized and S is reduced.

Question 4

When magnesium and chlorine react, what is the formula of the resulting compound?

A) MgCl
B) Mg₂Cl
C) MgCl₂
D) Mg₂Cl₂

Question 5

What is the coefficient of hydrogen when the following equation is balanced? __ Na + __ H₂O $\rightarrow$ __ NaOH + __ H₂

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

Question 6

What is the coefficient of cobalt when the following equation is balanced?
__ Co + __ O₂ $\rightarrow$ __ Co₂O₃

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

Question 7

Which balanced equation BEST describes this reaction?

A) Al₂ + 6 Br $\rightarrow$ Al₂Br₆ + Br₄
B) 2 Al + 5 Br₂ $\rightarrow$ 2 AlBr₃ + 2 Br₂
C) 2 Al + 3 Br₂ $\rightarrow$ 2 AlBr₃
D) 2 Al + 6 Br $\rightarrow$ 2 AlBr₃

Question 8

When calcium carbonate is heated, it forms two new compounds, calcium oxide and carbon dioxide. This is an example of a _____ reaction.

A) decomposition
B) synthesis
C) single displacement
D) double displacement

Question 9

Which choice BEST represents a balanced equation for the reaction of nitrogen gas and oxygen gas to form nitrogen monoxide?

A) N₂ + O₂ $\rightarrow$ 2 NO
B) N + O $\rightarrow$ NO
C) N₂ + 2 O $\rightarrow$ 2 NO
D) 2 N + O₂ $\rightarrow$ 2 NO

Question 10

When aluminum and sulfur react, what is the formula of the resulting compound?

A) AlS
B) Al₃S₂
C) Al₂S₃
D) AlS₃

Question 11

Which choice BEST represents a balanced equation for the reaction of nitrogen gas with hydrogen gas to produce ammonia?

A) N₂ + 3 H₂ $\rightarrow$ 2 NH₃
B) 2 N + 3 H $\rightarrow$ NH₃
C) N₂ + 6 H $\rightarrow$ 2 NH₃
D) N + 3 H $\rightarrow$ NH₃

Question 12

When solutions of potassium iodide and lead(II) nitrate are mixed, the result is potassium nitrate and lead(II) iodide. This is an example of a _____ reaction.

A) decomposition
B) synthesis
C) single displacement
D) double displacement

Question 13

What is the coefficient of potassium chloride when the following equation is balanced?
__ KClO₃ $\rightarrow$ __ KCl + __ O₂

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

Question 14

Which equation would be described as a double displacement reaction?

A) 2 CO + O₂ $\rightarrow$ 2 CO₂
B) CuCO₃ $\rightarrow$ CuO + CO₂
C) 2 AgNO₃ + Na₂CrO₄ $\rightarrow$ Ag₂CrO₄ + 2 NaNO₃
D) Zn + Cu(NO₃)₂ $\rightarrow$ Zn(NO₃)₂ + Cu

Question 15

When magnesium burns in oxygen, the result is magnesium oxide. This is an example of a _____ reaction.

A) decomposition
B) synthesis
C) single displacement
D) double displacement

Question 16

When aluminum is placed in a copper(II) chloride solution, the result is copper and aluminum chloride. This is an example of a _____ reaction.

A) decomposition
B) synthesis
C) single displacement
D) double displacement

Question 17

When potassium and fluorine react, what is the formula of the resulting compound?

A) KF
B) K₂F
C) KF₂
D) K₂F₂

Question 18

Which choice BEST represents a balanced equation for the reaction of nitrogen gas and chlorine gas to form nitrogen trichloride?

A) N₂ + 3 Cl₂ $\rightarrow$ 2 NCl₃
B) 2 N + 3 Cl $\rightarrow$ NCl₃
C) N₂ + 6 Cl $\rightarrow$ 2 NCl₃
D) N + 3 Cl $\rightarrow$ NCl₃

Question 19

Which equation would be described as a decomposition reaction?

A) 2 CO + O₂ $\rightarrow$ 2 CO₂
B) CuCO₃ $\rightarrow$ CuO + CO₂
C) 2 AgNO₃ + Na₂CrO₄ $\rightarrow$ Ag₂CrO₄ + 2 NaNO₃
D) Zn + Cu(NO₃)₂ $\rightarrow$ Zn(NO₃)₂ + Cu

Question 20

What is the coefficient of carbon dioxide when the following equation is balanced?
__ Fe₂(CO₃)₃ $\rightarrow$ __ Fe₂O₃ + __ CO₂

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

Question 21

According to the solubility rules, which compound is SOLUBLE in water?

A) CaCO₃
B) PbCl₂
C) Cu(NO₃)₂
D) CaSO₄

Question 22

The equation that shows the applicable dissociation of the reactants and products is called the _____ equation.

A) net ionic
B) ionic
C) molecular
D) algebraic

Question 23

Based on the solubility rules, what precipitate results from combining aqueous potassium bromide and aqueous lead(II) nitrate?

A) PbBr₂
B) KBr
C) PbK
D) KNO₃

Question 24

Consider the balanced equation representing the complete combustion of ethylene, C₂H₄. What is the coefficient of the oxygen?

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

Question 25

Based on the solubility rules, what precipitate results from combining aqueous sodium iodide and aqueous silver nitrate?

A) AgI
B) NaNO₃
C) AgNa
D) AgNO₃

Question 26

What products form from the neutralization reaction of HCl with sodium hydroxide?

A) NaClO₂ and H₂
B) H₂O and NaCl
C) NaH and ClO₂
D) O₂ and NaHCl

Question 27

The equation that shows all the reactant and product formulas is called the _____ equation.

A) net ionic
B) ionic
C) molecular
D) algebraic

Question 28

What are the products of the complete combustion of a hydrocarbon?

A) CO and H₂O
B) CO and H₂
C) CO₂ and H₂
D) CO₂ and H₂O

Question 29

When heated, magnesium and nitrogen combine to form a new compound, magnesium nitride. In this reaction:

A) both Mg and N are oxidized.
B) both Mg and N are reduced.
C) N is oxidized and Mg is reduced.
D) Mg is oxidized and N is reduced.

Question 30

According to the solubility rules, which compound is INSOLUBLE in water?

A) KBr
B) Na₂CO₃
C) Cu(OH)₂
D) AgClO₄

Question 31

What products form from the neutralization reaction of HBr with lithium hydroxide?

A) LiBrO₂ and H₂
B) H₂O and LiBr
C) LiH and BrO₂
D) O₂ and LiHBr

Question 32

Based on the solubility rules, what precipitate results from combining aqueous ammonium sulfate and aqueous barium nitrate?

A) ammonium nitrate
B) barium sulfate
C) barium ammonium
D) barium nitrate

Question 33

Consider the balanced equation representing the complete combustion of ethylene, C₂H₄. What is the coefficient of the ethylene?

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

Question 34

What products form from the neutralization reaction of HI with potassium hydroxide?

A) KIO₂ and H₂
B) H₂O and KI
C) KH and IO₂
D) O₂ and KHI

Question 35

Which equation BEST represents the combustion of propane, C₃H₈?

A) C₃H₈ + O₂ $\rightarrow$ C₃H₈O₂
B) C₃H₈ + 2 O $\rightarrow$ 3 CH₂O + H₂O
C) C₃H₈ + 5 O₂ $\rightarrow$ 3 CO₂ + 4 H₂O
D) C₃H₈ + 4 O $\rightarrow$ CH₂O₂ + H₂O

Question 36

The combustion reaction of magnesium results in what compound?

A) MgCl₂
B) MgCl₄
C) MgO
D) Mg₂O₃

Question 37

The combustion reaction of calcium results in what compound?

A) CaCl₂
B) Ca₂O₃
C) CaCl₄
D) CaO

Question 38

When heated, zinc and sulfur combine to form a new compound, zinc sulfide. In this reaction:

A) both Zn and S are oxidized.
B) both Zn and S are reduced.
C) S is oxidized and Zn is reduced.
D) Zn is oxidized and S is reduced.

Question 39

The equation that shows the applicable dissociation of the reactants and products without the spectator ions is called the _____ equation.

A) net ionic
B) ionic
C) molecular
D) algebraic

Question 40

According to the solubility rules, which compound is INSOLUBLE in water?

A) Ni(OH)₂
B) Li₂CO₃
C) KBr
D) AgNO₃

Question 41

Precipitation reactions and neutralization reactions are both _____ reactions.

A) single displacement
B) double displacement
C) synthesis
D) decomposition

Question 42

Which compound is a base?

A) NaCl
B) KOH
C) HCl
D) H₂O

Question 43

Which compound is a salt?

A) NaCl
B) CO
C) CH₄
D) H₂O

Question 44

What is the net ionic equation for the following reaction?
BaCl₂ (aq) + Na₂CO₃ (aq) $\rightarrow$ BaCO₃ (s) + 2 NaCl (aq)

A) Ba²⁺ (aq) + CO₃^2- (aq) $\rightarrow$ BaCO₃ (s) + 2 NaCl (s)
B) 2 Na⁺ (aq) + 2 Cl^- (aq) $\rightarrow$ 2 NaCl (aq)
C) Ba²⁺ (aq) + CO₃^2- (aq) $\rightarrow$ BaCO₃ (s)
D) Ba²⁺ (aq) + 2 Cl^- (aq) + 2 Na⁺ (aq) + CO₃^2- (aq) $\rightarrow$ BaCO₃ (s) + 2 Na⁺ (aq) + 2 Cl^- (aq)

Question 45

Which compound is an acid?

A) NaCl
B) KOH
C) HCl
D) H₂O

Question 46

The net ionic equation for any aqueous acid-base neutralization reaction is:

A) H⁺ (aq) + OH^- (aq) $\rightarrow$ H₂O (l).
B) Na⁺ (aq) + Cl^- (aq) $\rightarrow$ NaCl (s).
C) 4 H⁺ (aq) + O₂ (g) $\rightarrow$ 2 H₂O (l).
D) Na⁺ (aq) + OH^- (aq) $\rightarrow$ NaOH (aq).

Question 47

What is the net ionic equation for the following reaction?
ZnBr₂ (aq) + K₂CO₃ (aq) $\rightarrow$ 2 KBr (aq) + ZnCO₃ (s)

A) Zn²⁺ (aq) + CO₃² (aq) $\rightarrow$ ZnCO₃ (s) + 2 KBr (aq)
B) 2 K⁺ (aq) + 2 Br^- (aq) $\rightarrow$ 2 KBr (aq)
C) Zn²⁺ (aq) + CO₃^2- (aq) $\rightarrow$ ZnCO₃ (s)
D) Zn²⁺ (aq) + 2 Br^- (aq) + 2 K⁺ (aq) + CO₃^2- (aq) $\rightarrow$ 2 Na⁺ (aq) + 2 Cl^- (aq) + ZnCO₃ (s)