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Worksheets

Chemical Reactions Mixed Practice

Total questions: 109

Worksheet time: 2hrs 27mins

Name
Class
Date
1.

What class of reaction is shown here?

4Si + S8 ⟶ 2Si2S4

a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Double displacement
e)

Combustion

2.

What class of reaction is shown here?

3Ca + 2AlCl3 ⟶ 3CaCl2 + 2Al

a)
Synthesis
b)
Decomposition
c)

Single replacement

d)
Double displacement
e)

Combustion

3.

Is this a redox reaction?

3KOH + H3PO4 ⟶ K3PO+ 3H2O

a)

No

b)

Yes

4.

Is this a redox reaction?

2Pb(NO3)2 ⟶ 2PbO + 4NO2 + O2

a)

No 

b)

Yes

5.

What class of reaction is shown here?

3KOH + H3PO4 ⟶ K3PO+ 3H2O

a)
Synthesis 
b)
Decomposition
c)

Single replacement

d)

Double 

displacement

e)

Combustion

6.

What class of reaction is shown here?

2Pb(NO3)2 ⟶ 2PbO + 4NO2 + O2

a)
Synthesis 
b)
Decomposition
c)

Single 

replacement

d)
Combustion
e)

Double displacement

7.

What class of reaction is shown here?

3Mg + N2 ⟶ Mg3N2

a)
Synthesis 
b)
Decomposition
c)

Single replacement

d)
Combustion
e)

Double displacement

8.

What class of reaction is shown here?

2NO2 ⟶ N2 + 2O2

a)
Synthesis
b)
Decomposition
c)

Single 

replacement

d)
Combustion
e)

Double displacement

9.

What class of reaction is shown here?

P4 + 3O⟶ 2P2O3

a)
Synthesis 
b)
Decomposition
c)

Single 

replacement

d)
Combustion
e)

Double displacement

10.

What class of reaction is shown here?

Fe + H2SO4 ⟶ Fe2(SO4)3 + H2

a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
e)

Double displacement

11.

What type of reaction is shown here?

__ C5H10O4 + __O2 ⟶ __CO2 + __H2O

a)
Decomposition
b)
Single Replacement
c)
Combustion
d)

Double Displacement

e)

Synthesis

12.

Which set of coefficients correctly balances the equation below?

___C4H12 + ___O2 ⟶ ___CO2 + ___H2O

a)

1, 7, 4, 6

b)

1, 6, 4, 6

c)

1, 1, 1, 1

d)

1, 7, 4, 12

13.
Which of the following is the general formula for a decomposition reaction?
a)
A + B  → AB
b)
AB → A + B
c)
AB + C → AC + B
d)
AB + CD → AC + BD
14.

Identify the spectator ion(s) in this reaction. Refer to your solubility table.

MgCl2(aq) + 2 AgNO3(aq) ⟶ Mg(NO3)2(aq) + 2 AgCl(s)

a)

Mg2+

b)

Cl-

c)

Ag+

d)

NO3-

15.

Is this a redox reaction?

NH3 + HCl ⟶ NH4Cl 

a)

No

b)

Yes

16.

Balance this equation:  __Li + __Cl2 ⟶ __LiCl

a)

2Li + Cl2 ⟶ 4LiCl2

b)

2Li + Cl2 ⟶ LiCl2

c)

2Li +  Cl2 ⟶ 2LiCl

d)

2Li + Cl2 ⟶ Li2Cl2

17.

What class of reaction is shown here?

___C4H12 + ___O2 ⟶ ___CO2 + ___H2O

a)
Synthesis
b)
Combustion
c)
Single Replacement
d)

Double Displacement

e)

Decomposition

18.

What class of reaction is shown here?

H2SO4 + Fe ⟶ H2 + FeSO4

a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
e)

Combustion

19.

What class of reaction is shown here?

PbCl2 + AgNO3 ⟶ Pb(NO3)2 + AgCl 

a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)

Double Displacement

e)

Combustion

20.

What class of reaction is shown here?

NH3 + HCl ⟶ NH4Cl 

a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)

Double Displacement

e)

Combustion

21.

Which chemical reaction two ionic compounds switching the cations?

a)
Double Replacement
b)
Single Replacement
c)
Combustion
d)
Decomposition
e)

Synthesis

22.
Which chemical reaction takes place when 2 substances react to form a single product?
a)
Decomposition
b)
Double Replacement
c)
Single Replacement
d)
Synthesis
23.

The reaction XY ⟶ X + Y is an example of _____.

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

24.

The reaction XY ⟶ X + Y is an example of _____.

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

25.

The reaction A + B ⟶ AB is classified as a _____ reaction.

a)

synthesis

b)

decomposition

c)

single replacment

d)

double replacement

26.

The reaction AB + XY ⟶ XB + AY is an example of ______.

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

27.

What class of reaction best describes the equation below?

2HI ⟶ H2 + I2

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

28.

What class of reaction best describes the equation below?

Zn + H2S ⟶ ZnS + H2

a)

synthesis

b)

combustion

c)

single replacement

d)

double replacement

29.

What class of reaction best describes the equation below?

CH4 + O2 ⟶ CO2 + H2O

(a)  

30.

What class of reaction best describes the equation below?

FeS + HCl ⟶ H2S + FeCl2

(a)  

31.

What class of reaction best describes the reaction

Mg + HCl ⟶ MgCl2 + H2

(a)  

32.

The chemical equation

Cl2 + 2 KBr ⟶ 2 KCl + Br2

is best described as a _______ reaction.

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

33.

What class of reaction best describes the equation below?

MgCO3 ⟶ MgO + CO2

(a)  

34.

Which of the following chemical equations is an example of a combustion reaction?

a)

2Al2O3 ⟶ 4Al + 3O2

b)

2C5H10 + 15O2 ⟶ 10CO2 + 10H2O

c)

2MgCl2 + Na2CO3 ⟶ 2 NaCl + MgCO3

d)

K2O + H2O ⟶ 2 KOH

35.

Which of the following chemical equations is an example of a double displacement reaction?

a)

2Al2O3 ⟶ 4Al + 3O2

b)

2C5H10 + 15O2 ⟶ 10CO2 + 10H2O

c)

2MgCl2 + Na2CO3 ⟶ 2 NaCl + MgCO3

d)

K2O + H2O ⟶ 2 KOH

36.

Which of the following is an example of a decomposition reaction?

a)

2NaF ⟶ 2 Na + F2

b)

P2O5 + 3 H2O ⟶ 2H3PO4

c)

2FeCl3 + 3Zn ⟶ 2Fe + 3ZnCl2

d)

C6H12O6 + 6O2 ⟶ 6CO2 + 6 H2O

37.

Which of the following is an example of a single replacement reaction?

a)

2NaF ⟶ 2 Na + F2

b)

P2O5 + 3 H2O ⟶ 2H3PO4

c)

2FeCl3 + 3Zn ⟶ 2Fe + 3ZnCl2

d)

C6H12O6 + 6O2 ⟶ 6CO2 + 6 H2O

38.

Which of the following is an example of a synthesis reaction?

a)

Cl2 + 2NaBr ⟶ 2NaCl + Br2

b)

MgO + CO2 ⟶ MgCO3

c)

FeBr3 + K3PO4 ⟶ FePO4 + 3KBr

d)

2Na2O2 ⟶ 2Na2O + O2

39.

The reaction AB + X ⟶ XB + A is classified as a _____ reaction.

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

40.

Which set of coefficients correctly balances the following equation using lowest, whole number ratios?

___ H2 + ___ O2 → ___ H2O

a)

1, 1, 3

b)

2, 2, 2

c)

1, 2, 1

d)

2,1, 2

e)

4, 2, 4

41.

Fill in the blanks with the coefficient:s that correctly balance the equation:

PCl5 + _ H2O ⟶ _ HCl + H3PO4

a)

4, 5

b)

1, 6

c)

3, 8

d)

2,2

42.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)?

_Zn+_HCl ⟶ _ZnCl+_H2

a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
e)

2, 4, 2, 2

43.

Balance this equation:

P4 + O2  ⟶  P2O3

a)

3 P4+ O⟶ 2 P2O3

b)

 P4+ O⟶ 2 P2O3

c)

 P4+ 3 O2 ⟶ 2 P2O3

d)

 P4+ 2 O⟶ 3 P2O3

44.

Which of these equations represents a redox reaction?

a)

Ca(HCO3)2 ⟶ CaCO3 + H2O + CO2

b)

CH3COOH + NaOH ⟶ CH3COONa + H2O

c)

Zn + 2FeCl3 ⟶ ZnCl2 + 2FeCl2

d)

NaCl + AgNO3 AgCl + NaNO3

45.

Write a balanced reaction for this reaction

Zn(s) + H2S(aq) →

a)

ZnS + H

b)

ZnS + H2

c)

ZnS2 + H

d)

Zn2S + H2

46.

Which set of products gives the correctly balanced equation for the reaction:

NaOH + Fe(NO3)3

a)

NaFe + OH(NO3)3

b)

2NaNO3 + 3Fe(OH)3

c)

NaNO3 + FeOH

d)

3NaNO3 + Fe(OH)3

47.

What are the products for this combustion reaction:

C2H4 + 2 O2

a)

C2O2 + H4

b)

CO2 + HOH

c)

CO + H

d)

CO2 + H2O

48.

Predict the products for the this reaction:

K + HCl →

a)

KCl + H2

b)

KHCl

c)

KH + Cl2

d)

KCl + H

49.

Predict the products for the this reaction:

Mg + CuCl2

a)

MgCl2 + Cu

b)

MgCl + Cu

c)

MgCu + Cl2

d)

CuMg + Cl2

50.

Predict the products for the this reaction:

Ag3N + KCl →

a)

AgCl + K3N

b)

AgK + ClN3

c)

AgN3 + KCl

d)

KAg + N3Cl

51.

Predict the product of the following equation:

F2 + Ca →

a)

FCa

b)

F2Ca

c)

CaF2

d)

FCa

e)

CaF

52.
What are the correct formulas and coefficients for the products of the following single-replacement reaction?
Mg + Al(OH)3 →
a)
No Reaction
b)
Al + Mg(OH)3
c)
2 Al + 3 Mg(OH)2
d)
3 Al + MgOH3
53.

in a reaction, aqueous barium chloride reacts with aqueous potassium carbonate to produce solid barium carbonate and aqueous potassium chloride.

What is the correct balanced equation?

a)

Ba2Cl(aq) + KCO3(aq) 3 ⟶ BaCO3(s) + KCl(aq)

b)

BaCl2(aq) + K2CO3(aq) ⟶ BaCO3(s) + 2KCl(aq)

c)

2MgCl2 + Na2CO3 ⟶ 2BaCO3(s) + K2Cl(aq)

d)

Ba2Cl2(aq) + KCO3(aq) ⟶ CO3Ba2CO3(s) + KCl2(aq)

54.

What kind of reaction is shown below?

2C3H7OH +9O2 -> 6CO2 + 8H2O

a)

Double Displacement

b)
Combustion
c)
Single Replacement
d)
Decomposition
e)

Synthesis

55.

What class of reaction is shown below?

 CaCO3 + Ag2SO4 → CaSO+ Ag2CO3 

a)
Decomposition
b)
Single Replacement
c)

Double Displacement

d)
Combustion
e)

Synthesis

56.
Which type of reaction can be recognized by the general pattern?
A + BC--> AC + B
a)
Decomposition
b)
Combustion
c)
Single Replacement
d)
Double Replacement
57.

What class of reaction is shown below?

____ O2 + ____ C5H12O2  ⟶

a)
Single Replacement
b)
Combustion
c)
Decomposition
d)
Double Replacement
e)

Synthesis

58.

What class of reaction is shown below?

____ PbSO4 + ____ AgNO3 ⟶  

a)
Single Replacement
b)
Combustion
c)
Decomposition
d)

Double Displacement

e)

Synthesis

59.

What class of reaction is shown below?  ____ HBr + ____ Fe ⟶ 

a)
Single Replacement
b)
Combustion
c)
Decomposition
d)
Double Replacement
e)

Synthesis

60.

What class of reaction is shown below? 

BF4  ⟶ B + 2 F2   

(a)  

61.

What class of reaction is shown below?

Ca + 2AgNO3  ⟶ 

(a)  

62.

What class of reaction is shown below?  

Mg(OH)2 ⟶

a)
Single Replacement
b)
Combustion
c)
Decomposition
d)
Double Replacement
63.

What class of reaction is shown below?   Pb(NO3)2 + KOH => 

a)
Single Replacement
b)
Combustion
c)
Decomposition
d)

Double Displacement

e)

Synthesis

64.

Balance the equation: What is the coefficient on the sodium chloride? 

__NaCl + __AgNO3 ⟶  __AgCl + __NaNO3   

a)
2
b)
3
c)
1
d)
4
65.

According to the activity series, which of the following single replacement reactions can occur?

a)

Ca + Al2(SO4)3

b)

Fe + NaOH

c)

Ni + MgSO4

d)

Al + KOH

66.
If an element is diatomic it should have a subscript of___
a)
2, always
b)
2, only when it is by itself
c)
it shouldn't have a subscript, it should have a coefficent
67.

Based on the activity series, which metal could X represent in the reaction below?

X + Ca (NO3)2 --> Ca + X(NO3)2

a)

Ba

b)

Na

c)

Mg

d)

Zn

68.

What are the products of this reaction? (Refer to the activity series)

Zn(s) + H2SO4(aq) ⟶

a)

Zn(SO4)2 + H

b)

ZnSO4 + H2

c)

ZnSO4 + H

d)

Zn2SO4 + H2

e)

No reaction

69.

What are the products of this reaction?

C2H4 + O2

a)

C2O2 + H4

b)

CO2 + H2 + O2

c)

CO + H

d)

CO2 + H2O

e)

No reaction

70.

Write the balanced equation for the complete combustion of octane (C8H18)

a)

C8H18 + 8O2 ⟶ 8CO2 + 9H2O

b)

C8H18 + 17O2 ⟶ 8CO2 + 9H2O

c)

2C8H18 + 25O2 ⟶ 16CO2 + 18H2O

d)

C8H18 + O2 ⟶ CO2 + H2O

71.

The products of a combustion reaction involving hydrocarbons as a fuel will usually be

a)

unknown

b)

carbon dioxide and water

c)

carbon monoxide and hydrogen gas

d)

carbon and water

72.

To determine whether a single replacement reaction will happen, one must consult

a)

a lexicon

b)

the activity series

c)

a solubility chart

d)

One Thousand Magical Herbs and Fungi by Phyllida Spore

73.

Predict the product of the following synthesis reaction.

Ca + N2

a)

CaN2

b)

CaN

c)

Ca3N2

d)

CaNNot

74.

Predict the products, before balancing.

Co2(SO4)3 + NaOH ⟶

a)

CoOH + NaSO4

b)

CoNa + OH(SO4)3

c)

Co2OH + Na(SO4)3

d)

Co(OH)3 + Na2SO4

e)

no reaction

75.

Predict the products, before balancing.

NaNO3 + Li2SO4

a)

NaSO4 + Li2NO3

b)

Na2SO4 + LiNO3

c)

NaLi + NO3SO4

d)

no reaction

76.

Predict the products, before balancing.

HC2H3O2 + Ba(OH)2

a)

Ba(C2H3O2)2 + H2

b)

HBa + OHC2H3O2

c)

Ba(C2H3O2)2 + H2O

d)

BaC2H3O2 + H(OH)2

e)

BaC2H3O2 + H2O

77.

Predict the products for the this reaction: K + HCl ⟶

a)

KCl + H2

b)
KHCl 
c)

KH + Cl2

d)
KCl + H
78.

Barium bromide reacts with lithium phosphate to yield lithium bromide and barium phosphate. What substance forms the precipitate in this reaction? (Refer to your solubility table)

a)

lithium phosphate

b)

lithium bromide

c)

barium bromide

d)

barium phosphate

79.

What coefficients would properly balance the equation below?

__C6H14 + __ O2 ⟶ __ CO2 + __ H2O

a)

2, 20, 12, 14

b)

1, 9, 6, 7

c)

2, 19, 12, 14

d)

1, 8, 6, 7

80.

Predict the formulas of the product(s) for the following reaction. (No need to balance.)

Ca(OH)2 + HNO3

a)

Ca(NO3)2 + H2O

b)

H2Ca + (OH)(NO3)

c)

CaNO3 + H2O

d)

CaH + NO3OH

81.

What precipitate forms when you mix lead (II) nitrate with sodium chloride? (Refer to your solubility table)

a)
sodium nitrate 
b)
lead (II) chloride 
c)
sodium lead
d)
chloride nitrate 
82.

Which is the correct net ionic equation for the reaction of AgNO3 and CaCl2? (Refer to your solubility table)

a)
Ca2+(aq) +  2Cl- (aq) → CaCl(s)
b)
Ag+(aq)  +  Cl- (aq) → AgCl(s)
c)
Ag +  Cl  →  AgCl
d)
Ag+  +  Ca2+   →Ag2Ca (s)
83.

What is the correct net ionic equation for the reaction shown below?

3 FeC2H3O2(aq) + 2 Na3PO4(aq) → Fe3(PO4)2(s) + 6 NaC2H3O2(aq)  

a)

3 Fe3+ + 2 PO43- → 

Fe3(PO4)2  

b)

3 C2H3O2 + 2Na+  →

6 NaC2H3O2 

c)

Fe3+ + PO43- → 

Fe3(PO4)2  

d)

C2H3O2 + Na+  →

NaC2H3O2 

84.

Which of the following does NOT form a precipitate?

(Refer to your solubility table)

a)
Pb(NO3)2(aq) + 2KI(aq) 
b)
Sr(NO3)2 (aq) + K2SO4(aq) →
c)
AgNO3(aq) + Na2S(aq) →
d)
 Pb(NO3)2(aq) + AgNO3(aq) →
85.

What are the spectator ions in the reaction of sodium chloride with silver nitrate?

(Start by writing a balanced equation, then refer to your solubility table)

a)
silver and nitrate
b)
sodium and chloride
c)
sodium and nitrate
d)
silver and chloride
86.

In this equation, CuCl2 + NaOH  → Cu(OH)2 + NaCl

Which product is insoluble?

(Refer to your solubility table)

a)
copper(II) hydroxide
b)
sodium chloride
c)
sodium hydroxide
d)
copper(II) chloride
87.

Which of these results in the formation of a precipitate?

(Refer to your solubility table)

a)
AgNO3(aq)  +  NaOH(aq)→
b)
BaNO3(aq)  +  CaCl2(aq)→
c)
NaNO3(aq)  +  KOH(aq)→
d)
More than one of these form precipitates
88.

Which of these results in formation of a precipitate?

(Refer to your solubility table)

a)
BaNO3(aq)  +  NaCl(aq)→
b)
KNO3(aq)  +  LiOH(aq)→
c)
Zn(NO3)2(aq)  +  NaOH(aq)→
d)
NaNO3(aq)  +  Ba(OH)2(aq)→
89.

What are the spectator ions in this reaction?

3 FeC2H3O2(aq) + 2 Na3PO4(aq) → Fe3(PO4)2(s) + 6 NaC2H3O2(aq)  

a)

Fe3+

b)

C2H3O2-

c)

Na+

d)

PO43-

90.

Which is the correct net ionic equation for the reaction of AgNO3 and CaCl2?

(Refer to your solubility table)

a)

Ca2+ +  2Cl- → CaCl(s)

b)

Ag+ +  Cl-  → AgCl(s)

c)
Ag +  Cl  →  AgCl
d)

Ag+  +  Ca2+   →Ag2Ca

91.
What are the spectator ions in this reaction?
CuCl2(aq) + NaOH(aq) → Cu(OH)2(s) + NaCl(aq)
 
a)
Cu2+ and OH1-
b)
Na2+ and Cl2-
c)
Na1+ and Cl1-
d)
Na1+ and OH1-
92.

What is the net ionic equation for the reaction between K3PO4 (aq) and CuSO4 (aq)?

(Refer to your solubility table)

a)

2 K+(aq) + SO42-(aq) → K2SO4 (s)

b)

K+(aq) + SO42-(aq) → KSO4 (s)

c)

3Cu2+(aq) + 2 PO43-(aq) → Cu3(PO4)2 (s)

d)

Cu2+(aq) + PO43-(aq) → CuPO4 (s)

93.

What are the correct products (before balancing) for the following reaction?

HCl + Mg(OH)2

a)

MgCl2 + H2O

b)

Mg +H2O

c)

MgCl2 + H2

d)

MgCl2 + H2O + CO2

94.

What is the correct net ionic equation for this reaction? Refer to your solubility table.

MgCl2(aq) + 2 AgNO3(aq) ⟶ Mg(NO3)2(aq) + 2 AgCl(s)

a)

Ag+ + Cl- ⟶ AgCl

b)

Mg2+ + 2 NO3- ⟶ Mg(NO3)2

c)

Ag+ + NO3 ⟶ AgNO3

d)

Ag+ + Cl2- ⟶  AgCl2

95.

Is this a redox reaction?

4Si + S8 ⟶ 2Si2S4

a)

Yes

b)

No

96.
Based on the activity series, will this reaction occur?
Ni (s) + H2O (l) →
a)
Yes
b)
No
97.
Based on the activity series, will this reaction occur?
Br2 (l) + KI (aq) →
a)
Yes
b)
No
98.
Based on the activity series, will this reaction occur?
Au (s) + HCl (l) →
a)
Yes
b)
No
99.

A mixture contains chromium metal, copper metal, and tin metal. This mixture is mixed with a solution of nickel(II) nitrate. Which metals, if any, will react? 

a)

Chromium, only

b)

Copper, only

c)

Tin, only

d)

All 3 metals will react

100.

Predict the product(s) of this reaction (don't worry about balancing):

Li + H2O →

a)

Li2O + H2

b)

LiO + H2

c)

LiOH + H2

d)

Li(OH)2

101.

Predict the product(s) of this reaction (don't worry about balancing):

Mg + HCl →

a)

MgHCl

b)

MgCl2 + H2

c)

MgCl2 + H

d)

MgCl + H2

102.

Predict the product(s) of this reaction (don't worry about balancing):

SrI2 +Br2

a)

Sr + I2Br2

b)

SrBr + I2

c)

SrBr2 + I2

d)

Sr + IBr2

103.

Which metal is more reactive than calcium? (Refer to the activity series)

a)

magnesium

b)

potassium

c)

silver

d)

aluminum

104.

What  will be the result of the following?

Br2 + NaF ⟶

(Refer to your activity series)

a)

Br will replace Na

b)
Na will replace Br
c)
Br will replace F
d)

No reaction will occur

105.

What  will be the result of the following:  Li + NaF ⟶

(Refer to your activity series)

a)
Li will replace F
b)
Na will replace Li
c)
Li will replace Na
d)
no reaction will occur
106.

What will be the result of :  Zn + AuCl2

(Refer to the activity series)

a)
ZnCl2 +Au
b)
ZnAu + Cl2
c)
no reaction
d)
ClAu + Zn
107.
Will silver react with magnesium chloride solution?
a)
yes
b)
no
108.

Which one of the following would result in a reaction?

a)

iron with magnesium chloride

b)

magnesium with iron chloride

c)

iron with zinc sulfate

d)

gold with silver nitrate

109.
Which of the following will not undergo reaction?
a)
zinc metal  +  zinc oxide 
b)
iron metal  +  copper oxide
c)
zinc metal +  iron oxide
d)
magnesium  +  iron oxide