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Worksheets

Unit 3 A Review

Total questions: 123

Worksheet time: 4hrs 51mins

Name
Class
Date
1.
What type of reaction occurs between an element and a compound?
Zn + 2HCl --> ZnCl2 + H2
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
2.
What kind of reaction is this:
2H2 + O2 --> 2H2O
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
3.
What kind of reaction is this:
4Fe  +  3O2 →   2Fe2O3 
a)
Synthesis
b)
Decomposition
c)
Single Replacement 
d)
Double Replacement
4.
What kind of reaction is this:
2H2O2 →2 H2O + O2
a)
Synthesis
b)
Decomposition
c)
Single Replacement 
d)
Combustion
5.
What kind of reaction is this:
2C3H7OH +9O2 -> 6CO2 + 8H2O
a)
Double Replacement
b)
Combustion
c)
Single Replacement
d)
Decomposition
6.
What kind of reaction is this:
Fe + CuSO4 -> Cu + FeSO4
a)
Double Replacement
b)
Decompostion
c)
Single Replacement
d)
Combustion
7.
The reaction below is an example of?
AgNO3 + NaCl → AgCl + NaNO3
a)
Single Replacement
b)
Double Replacement
c)
Decomposition
d)
Combustion
8.
What kind of reaction is this:
 CaCO3 + Ag2SO4 → CaSO4 + Ag2CO3 
a)
Decomposition
b)
Single Replacement
c)
Double Replacement
d)
Combustion
9.
An element plus additional element reacts to form one product is an example of which type of chemical reaction? 
a)
combustion
b)
decomposition 
c)
synthesis 
d)
single replacement
10.
Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?
a)
double replacement 
b)
decomposition 
c)
combustion 
d)
single replacement
11.
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
12.
What type of reaction is illustrated below?
2HI --> H2  +  I2
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
13.
Which of the following general formulas represents a single-displacement reaction?
a)
AB → A + B   
b)
A + B → AB
c)
A + BC → AC + B
d)
AB + CD → AD + CB
14.
The formula AB → A+B represents what type of chemical reaction?
a)
synthesis
b)
decomposition
c)
single displacement
d)
double replacement
15.

In a combustion reaction, one of the reactants is ____.

a)

carbon

b)

oxygen

c)

hydrogen

d)

nitrogen

16.

The equation H3PO4 + 3KOH --> K3PO4 + 3H2O is an example of which type of reaction?

a)

combustion

b)

decomposition

c)

single replacement

d)

double replacement

e)

synthesis

17.
One reactant into several products.
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
18.
Always starts with a Hydrocarbon that reacts with oxygen and produces carbon dioxide and water. 
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
19.
Ions in two compounds switch. 
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
20.
What is decomposition?
a)
putting substances together
b)
breaking substances apart
c)
element replacing another element in a compoud
d)
burning of a subtance
21.

What type of reaction involves the breaking down of a substance into simpler substances?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

22.

What type of reaction involves 2 substances combining to form 1 new compound?

a)

Decomposition Reaction

b)

Single Replacement Reaction

c)

Double Replacement Reaction

d)

Synthesis Reaction

23.

What type of reaction involves ions or elements from 2 compounds exchanging places to form 2 completely new compounds?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

24.

What are the reactants in the chemical equation pictured?

a)

CH4 and CO2

b)

CH4 and O2

c)

CO2 and H2O

d)

O2 and H2O

25.

What are the products of the chemical reaction pictured?

a)

CH4 and CO2

b)

CH4 and O2

c)

CO2 and H2O

d)

O2 and H2O

26.

When Lead nitrate reacts with Potassium iodide, a yellow precipitate is formed. Predict the products for this reaction.

a)

PbI2 + KNO3

b)

KNO3 + Pb

c)

Pb(KO3)2 + NO3

d)

PbIO3 + PbI2

27.

Balancing this reaction:

____ CH4 + ____ O2 ---> ___ CO2 + ____ H2O

a)

2,1,3,1

b)

1,2,1,2

c)

1,2,2,1

d)

2,1,1,2

28.

The red numbers in the image below represent ________

a)

subscripts

b)

coefficients

c)

formulas

d)

None of the answers are correct

29.

The blue numbers in the image below represent ________

a)

formulas

b)

coefficients

c)

subscripts

d)

none of the answers are correct

30.

What type of chemical reaction has a general formula of:

AB + CD ----> CB + AD

a)

Synthesis

b)

Combustion

c)

Single Replacement

d)

Double Replacement

e)

Decomposition

31.

What type of chemical reaction is shown in this equation?

Zn + 2HCl --> ZnCl2 + H2

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

32.

When heated, Copper (II) Carbonate yields Copper (II) Oxide and Carbon Dioxide. What type of reaction is this?

a)

Combustion

b)

Decomposition

c)

Double Replacement

d)

Single Replacement

e)

Synthesis

33.

What is the general reaction formula for a single replacement reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

CxHy+O2 −> CO2+H2OC_xH_y+O_2\ ->\ CO_2+H_2O

34.

What type of chemical reaction occurs when two elements react to form one product?

a)

Single Replacement

b)

Combustion

c)

Double Replacement

d)

Synthesis

e)

Decomposition

35.

What type of chemical reaction is shown here?

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

a)

Double Replacement

b)

Combustion

c)

Single Replacement

d)

Decomposition

e)

Synthesis

36.

When two compounds react and a precipitate is formed as one of the products. What type of chemical reaction occurred?

a)

Synthesis

b)

Combustion

c)

Single Replacement

d)

Decomposition

e)

Double Replacement

37.

Two chemicals reacted and one of the products stays dissolved in the solution. What symbol is used to indicate this?

a)

(s)

b)

(l)

c)

(aq)

d)

(g)

38.

Predict the products for this substance: Al2O3 → ? + ?

a)

Al + O2

b)

O2 + Al3

c)

Al2 + O3

d)

Al + O

e)

Al3 + O

39.

Predict the products if Calcium Carbonate reacts with Silver Sulfate.

CaCO3 + Ag2SO4 → ?

a)

Ag2CO3 + Ca2SO4

b)

AgCO3 + CaSO4

c)

CaSO4 + Ag2CO3

d)

Ag(CO3)2 + CaSO4

40.

If Ethylene (C2H4) reacts with Oxygen gas in a chemical reaction, what are the products?

a)

C2O2 + H4

b)

CO2 + H2 + O2

c)

CO + H2

d)

CO2 + H2O

41.

Magnesium Oxide reacts with Water to produce Magnesium Hydroxide. What type of reaction is this?

a)

Decomposition

b)

Synthesis

c)

Single Replacement

d)

Combustion

e)

Double Replacement

42.

Barium Bromide reacts with Lithium Phosphate to yield is a possible product?

a)

Li3PO4

b)

Li2Br3

c)

BaBr2

d)

Ba3(PO4)2

43.
How many different types/classifications of Chemical Reactions have we learned about?
a)
3
b)
4
c)
5
d)
6
44.

What are the products of this reaction?


Cu+ AgNO3-->

a)

Cu(NO3)2 + Ag

b)

CuNO3 + Ag

c)

CuAg+ NO3

d)

Cu+ AgNO3

45.

Predict the products for the this reaction:


K + HCl -->

a)

KCl + H2

b)

KHCl

c)

KH + Cl2

d)

KCl + H

46.

What are the products of this reaction?


Cu+ AgNO3-->

a)

Cu(NO3)2 + Ag

b)

CuNO3 + Ag

c)

CuAg+ NO3

d)

Cu+ AgNO3

47.

Predict the products for the this reaction:


K + HCl -->

a)

KCl + H2

b)

KHCl

c)

KH + Cl2

d)

KCl + H

48.

Write a balanced equation for this reaction:


C2H4 + 2O2 -->

a)

C2O2 + H4

b)

CO2 + HOH

c)

CO + H

d)

2CO2 + 2H2O

49.

What type of reaction is this?


2C6H14 + 19 O2 --> 12 CO2 + 14 H2O

a)

Single Replacement

b)

Double Replacement

c)

Combustion

d)

Decomposition

50.

What are the correct formulas and coefficients for the products of the following single-replacement reaction?


3Mg + 2Al(OH)3 →

a)

No Reaction

b)

Al + Mg(OH)3

c)

2Al + 3Mg(OH)2

d)

3Al + MgOH3

51.
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
52.

What kind of reaction is this:


4Fe + 3O2 → 2Fe2O3

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

53.

What kind of reaction is this:


Fe + CuSO4 -> Cu + FeSO4

a)

Double Replacement

b)

Decompostion

c)

Single Replacement

d)

Combustion

54.
What is the product when rubidium and oxygen gas react?
a)
RbO2
b)
Rb2O
c)
RbO
d)
Rb2O2
55.

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) --> BaCO3(s) + KCl(aq)

b)

BaCl2(aq) + K2CO3(aq) --> BaCO3(s) + 2KCl(aq)

c)

BaCl(aq) + K2CO3(aq) --> BaCO3(s) + K2Cl(aq)

d)

Ba2Cl2(aq) + KCO3(aq) --> Ba2CO3(s) + KCl2(aq)

56.
 Predict the product(s):  H2O -->
a)
H and O
b)
H2 and O2
c)
H and OH
57.

Which of the following are PRODUCTS?


H2O + CO2 → HCO + HO

a)

H2O and CO2

b)

HCO and HO

c)

H2O ONLY

d)

HCO ONLY

58.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
59.

Type of Reaction?


____ PbSO4 + ____ AgNO3 =>

a)

Single Replacement

b)

Combustion

c)

Decomposition

d)

Double Replacement

60.

Which of the following is a product of the reaction and BALANCED:


Li + N2 =>

a)

2Li3N

b)

Li3N

c)

2LiN3

d)

LiN3

61.

Which of the following is a product of the reaction and BALANCED:


H2SO4 + BaCl2 =>

a)

2BaSO4

b)

2HCl

c)

HCl

d)

H2Ba

62.

What type of reaction is this?


2C6H14 + 19O2 --> 12CO2 + 14H2O

a)

Single Replacement

b)

Double Replacement

c)

Combustion

d)

Decomposition

63.

What are the products of this reaction?


Zn(s) + H2SO4(aq) -->

a)

Zn(SO4)2 + H

b)

ZnSO4 + H2

c)

ZnSO4 + H

d)

Zn2SO4 + H2

e)

No reaction

64.
Write the balanced equation for octane (C8H18) combusting
a)
C8H18 + 8O2 --> 8CO2 + 9H2O
b)
C8H18 + 17O2 --> 8CO2 + 9H2O
c)
2C8H18 + 25O2 --> 16CO2 + 18H2O
d)
C8H18 + O2 --> CO2 + H2O
65.
What is the generic formula for a single replacement reaction? 
a)
A + BC ---> CA + B
b)
A + BC ---> BC + A
c)
A + BC ---> AB + C
d)
A + BC ---> AC + B
66.
A compound that contains only carbon and hydrogen and that produces CO2 and H2O when burned is called a(n)
a)
binary compound
b)
carbonate
c)
ionic compound
d)
hydrocarbon
67.

The word equation for complete combustion is: fuel + oxygen --> water + ________ __________

a)

Carbon dioxide

b)

Carbon

68.

Write a balanced equation for this DR reaction.


3NaOH + Fe(NO3)3 -->

a)

NaFe + OH(NO3)3

b)

2NaNO3 + 3Fe(OH)3

c)

NaNO3 + FeOH

d)

3NaNO3 + Fe(OH)3

69.

What reaction has the following general formula:


AB --> A + B

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

70.

What reaction has the following general formula:

CxHy + O2 −>CO2 + H2OC_xH_y\ +\ O_2\ ->CO_{2\ }+\ H_2O  

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

71.

Which would indicate a chemical equation is balanced?

a)

If the number of atoms in the reactants is the same as the number of atoms in the products

b)

If the atoms have ionic OR covalent bonds

c)

If the atoms have full valence shells

d)

If the total energy has remained the same

72.
The substances listed on the left side of a chemical equation are the
a)
Products
b)
Coefficients
c)
Precipitates
d)
Reactants
73.

What are the coefficient used to balance the equation below?


__Ag2O →__ Ag +___O2

a)

2,4,1

b)

1,1,1

c)

2,1,2

d)

2,2,2

74.

Balance this equation:


__ Al + __ HCl → __ H2 + __ AlCl3

a)

2, 6, 3, 2

b)

it is already balanced

c)

4, 12, 3, 4

d)

2, 1, 4, 5

75.

Predict the products for the decomposition of aluminum oxide, Al2O3 →

a)

Al + O2

b)

O + Al2

c)

Al2 + O3

d)

Al + O

76.

If you rewrite the following word equation as a balanced chemical equation, what will the coefficient and symbol for Iodine be?

Potassium Iodide reacts with Chlorine gas to produce Potassium Chloride and Iodine.

a)

2 I

b)

I

c)

2 I2

d)

I2

77.

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

a)

Ca2+(aq) +  2Cl- (aq) → CaCl(s)

b)

Ag +  Cl  →  AgCl

c)

Ag+(aq)  +  Cl- (aq) → AgCl(s)

d)

Ag+  +  Ca2+   → Ag2Ca (s)

78.

Which type of chemical reaction would this be classified as:

C3H8 + O2 → CO2 + H2O

a)

Combustion

b)

Single replacement

c)

Double replacement

d)

Decomposition

79.

Write a balanced chemical equation given the following reaction: Propane (C3H8) combusts in the presence of oxygen.

a)

C3H8 + 6O --> 3CO2 + 8H

b)

C3H8 + 7O2 --> 3CO2 + 4H2O

c)

C3H8 + 5O2 --> 3CO2 + 4H2O

d)

C3H8 + 6O --> 3CO2 + 4H2

80.

What type of reaction is this?

2NaCl + H2SO4 → Na2SO4 + 2HCl

a)

Synthesis

b)

Decomposition

c)

Double replacement

d)

Single replacement

81.

Atoms with the same number of protons, but different numbers of neutrons are called…

a)

Sisters

b)

Brothers

c)

Isotopes

d)

Ions

82.

Copper (II) Carbonate is heated and produces Copper (II) Oxide and Carbon dioxide is an example of

a)

Decomposition

b)

Combustion

c)

Single replacement

d)

Synthesis

83.

What type of reaction is this?

2NH3 → N2 + 3H2

a)

Decomposition

b)

Combustion

c)

Single replacement

d)

Synthesis

84.

What are the correct coefficients when this equation is balanced?

KOH + Mg3(PO4)2 → K3PO4 + Mg(OH)2

a)

6, 2, 3, 4

b)

6, 1, 2, 3

c)

12, 2, 4, 6

d)

6, 1, 3, 2

85.

How many total atoms are in 3 Na2SO4?

a)

9

b)

13

c)

18

d)

21

86.

Which are the product(s) of this reaction?

Mg + Li3N -->

a)

Mg3N2Li2

b)

No reaction, Magnesium can not replace Lithium

c)

Mg3N2 and Li

d)

Li2 and MgN

87.

Chemical equations must be balanced to satisfy the _____.

a)

Law of combustible masses

b)

Law of conversations about masses

c)

Law of conservation of masses

d)

Law of compatible masses

88.

What are the product(s) of this chemical reaction?

FeCl3 + NH4OH -->

a)

Fe(OH)3 + NH4Cl

b)

NH4Fe + Cl3OH

c)

NCl3 + FeOH5

d)

FeCl3NOH4

89.

Which of the following statements are true?

1. Ionic compounds conduct electricity when dissolved in water

2. Covalent compounds conduct electricity in a solid state

3. Metals conducts electricity in a solid state

4. Covalent compounds conduct electricity when dissolved in water

a)

1

b)

2

c)

3

d)

4

90.

Magnesium metal reacts with a solution of hydrochloric acid in the reaction:

Mg (s) + HCl (aq) --->

What are the products of this reaction?

a)

Mg and Cl and H

b)

MgCl2 and H2

c)

Mg and H

d)

MgCl2 and HCl

91.

What are the correct coefficients when this equation is balanced?

Sb + O2 → Sb4O6

a)

1, 1, 1

b)

2, 3, 1

c)

4, 6, 1

d)

4, 3, 1

92.
a)

1,1,2

b)

1,2,1.5

c)

2,4,3

d)

4,8,6

93.

Sodium + Water => Sodium hydroxide is an example of

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Combustion

94.

In the equation below, determine the product(s)?

Mg(s) + O2 -->

a)

Mg +O2Mg\ +O_2

b)

Mg2O2Mg_2O_2

c)

MgOMgO

d)

Mg2OMg_2O

95.

An equation that includes only the particles that participate in the reaction. 

a)

gross ionic equation

b)

net ionic equation

c)

complete ionic equation

d)

chemical equation

96.

Which of the following is written CORRECTLY?

a)

Al3S2

b)

Copper (II) sulfate

c)

NO3Li

d)

Magnesium dioxide

97.

When the equation is Fe3O2 + Al --> Al2O3 + Fe correctly balanced, what is the coefficient of Fe?

a)

2

b)

4

c)

9

d)

3

98.

When the following equation is balanced, what is the coefficient of ___NaNO3

Pb(NO3)2 +Na3P →  Pb3P2 +  NaNO3Pb\left(NO_3\right)_2\ +Na_3P\ \rightarrow\ \ Pb_3P_2\ +\ \ NaNO_3 ?

a)

6

b)

2

c)

3

d)

4

99.

What type of reaction is this?Fe + S →FeS

a)

single replacement

b)

synthesis

c)

decomposition

d)

double replacement

100.

When potassium hydroxide and barium chloride react, potassium chloride and barium hydroxide are formed. The coefficient for potassium chloride in the balanced chemical equation would be____.

a)

1

b)

2

c)

3

d)

4

101.

Which of the following reactions will occur?

a)

NaCl + I2 -->

b)

NaBr + I2 -->

c)

KBr + F2 -->

d)

LiF + Cl2 -->

102.

When the equation for the complete combustion of ethanol, (C2H5OH) is balanced, what is the coefficient for oxygen?

a)

1

b)

3

c)

6

d)

7

103.

An atom with 55 protons has a mass number of 100. It must contain how many neutrons?

a)

100

b)

155

c)

45

d)

55

104.

what is a reactant?

a)

a volatile chemical

b)

a dangerous substance

c)

the substance(s) you start with in a chemical reaction

d)

the substance(s) you end with in a chemical reaction

105.

what is a product?

a)

a volatile chemical

b)

a dangerous substance

c)

the substance(s) you start with in a chemical reaction

d)

the substance(s) you end with in a chemical reaction

106.

The number of atoms you begin with in a chemical reaction...

a)

must be the same as the number of atoms you end with

b)

must be an even number

c)

can be different to the number you finish with

d)

changes depending on how much energy is formed

107.

What mathematical function do coefficients perform in a balanced equation?

a)

addition

b)

multiplication

c)

subtraction

d)

division

108.

When the equation is balanced what are the correct coefficients?



a)

1, 1, 2

b)

 1, 3, 1

c)

2, 2, 3

d)

2, 3, 2

109.

What are the correct coefficients when the equation is balanced?

a)

2, 3, 4

b)

4, 3, 2

c)

1, 1, 2

d)

2, 1, 1

110.

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

a)
b)
c)
d)
111.

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

a)
b)
c)
d)
112.

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

a)
b)
c)
d)
113.

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

a)
b)
c)
d)
114.

The red numbers in the image represent

a)

subscripts

b)

coeffiecients

c)

roman numerals

d)

none of the answer options are correct

115.

The blue numbers in the image represent

a)

subscripts

b)

coeffiecients

c)

roman numerals

d)

none of the answer options are correct

116.

When balanced, the correct coefficients for the equation are:

a)

1, 3, 3, 1

b)

1, 3, 2, 1

c)

2, 3, 3, 1

d)

1, 1, 3, 1

117.

When balanced, the correct coefficients for the equation are:

a)

2, 1, 3, 1

b)

1, 2, 1, 2

c)

1, 2, 2, 1

d)

2, 1, 1, 2

118.

When balanced, the correct coefficients for the equation are:

a)

3, 1, 2, 1

b)

1, 2, 3, 4

c)

2, 1, 2, 1

d)

1, 2, 1, 1

119.

When balanced, the correct coefficients for the reaction are:

a)

1, 1, 1, 1

b)

1, 2, 1, 1

c)

2, 1, 1, 2

d)

2, 1, 2, 1

120.

When balanced, the correct coefficients are:

a)

2, 2, 2

b)

2, 2, 3

c)

3, 2, 2

d)

1, 2, 3

121.

Why must the number of atoms on either side of the arrow be equal to each other in a chemical equation?

a)

to abide by the law of conservation of energy

b)

to abide by law of conservation of mass

c)

to abide by the law of fundamental equations

d)

because everything must be even for the universe to stay in balance

122.

When balancing a chemical equation, you can only change _________, you can never change _______!

a)

coefficients, subscripts

b)

subscripts, coefficients

c)

formulas, subscripts

d)

coefficients, formula units

123.

What type of reaction involves a fuel being burned in the presence of oxygen in order to produce carbon dioxide and water?

a)

single replacement

b)

synthesis

c)

double replacement

d)

combustion

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