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Total questions: 70

Worksheet time: 1hrs 29mins

Name
Class
Date
1.

Li2O +H2O → LiOH

a)

Sythesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

2.

CH3OH  +  O2 → CO2  +  H2O

a)

Sythesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

3.

Cr + S8 → Cr2S3

a)

Sythesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

4.

C6H6  +  O2 → CO2  +  H2O

a)

Sythesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

5.

Ba(HCO3)2   → BaCO3  + CO2 + H2O

a)

Sythesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

6.

8.7: Combustion is when a __________ reacts with oxygen

a)

petrol

b)

fuel

c)

fire triangle

d)

carbon dioxide

7.
Complete combustion is when there is plenty of oxygen to react with. 
a)
True
b)
False
8.
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
9.
4Si + S8 --> 2Si2S4
a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Double displacement
10.
3Ca + 2AlCl3 --> 3CaCl2 + 2Al
a)
Synthesis
b)
Decomposition
c)
Single diplacement
d)
Double displacement
11.
3KOH + H3PO4 --> K3PO4 + 3H2O
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Double displacement
12.
2Pb(NO3)2 --> 2PbO + 4NO2 + O2
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
13.
3Mg + N2 --> Mg3N2
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
14.
2NO2 --> N2 + 2O2
a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Combustion
15.
P4 + 3O2 --> 2P2O3
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
16.
Fe + H2SO4 --> Fe2(SO4)3 + H2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
17.
Which reaction type is the following: C5H10O4 + O2 --> CO2 + H2O
a)
Decomposition
b)
Single Replacement
c)
Combustion
d)
Double Replacement
18.
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
19.
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
20.
C4H12 + O2 --> CO2 + H2O
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
21.
H2SO4 + Fe -->H2 + FeSO4
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
22.
PbCl2 + AgNO3 ---> Pb(NO3)2 + AgCl 
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
23.
NH3 + HCl ---> NH4Cl 
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
24.
Which chemical reaction switches 2 elements?
a)
Double Replacement
b)
Single Replacement
c)
Combustion
d)
Decomposition
25.
Which chemical reaction takes place when 2 substances react to form a single product?
a)
Decomposition
b)
Double Replacement
c)
Single Replacement
d)
Synthesis
26.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
27.
4Si + S8 --> 2Si2S4
a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Double displacement
28.
3Ca + 2AlCl3 --> 3CaCl2 + 2Al
a)
Synthesis
b)
Decomposition
c)
Single diplacement
d)
Double displacement
29.
2Pb(NO3)2 --> 2PbO + 4NO2 + O2
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
30.
3Mg + N2 --> Mg3N2
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
31.
2NO2 --> N2 + 2O2
a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Combustion
32.
P4 + 3O2 --> 2P2O3
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
33.
Fe + H2SO4 --> Fe2(SO4)3 + H2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
34.
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
35.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

36.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

37.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

38.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

39.

In a ___________change, a substance changes into a different substance.

a)

Physical

b)

Chemical

40.
The reactants are on the left side of the chemical equation.
a)
True
b)
False
41.

What are products?

a)

The chemicals that start the reaction.

b)

The chemicals that the reaction produced.

c)

The chemicals that are on the left side of the arrow.

42.

The products are on the right side of the chemical equation.

a)

True

b)

False

43.

Identify the type of reaction:

ZnCl2 + Mg --> Zn + MgCl2

a)

Precipitate

b)

Single Replacement

c)

Double Replacement

d)

Decomposition

44.

Identify the reaction type:

NaCl + KOH --> KCl + NaOH

a)

Double replacement

b)

Combustion

c)

Synthesis

d)

Decomposition

45.
2 Na + Cl₂ →       2 NaCl
a)
Double Replacement
b)
Synthesis
c)
Single Replacement
d)
Decomposition
46.

C7H14 + O₂ → CO₂ + H₂O

a)

Decomposition

b)

Single Replacement

c)

Double Replacement

d)

Combustion

e)

Neutralization

47.
2Na +S → Na2S
a)
Double Replacement
b)
Decomposition
c)
Combustion
d)
Synthesis
48.
BaCl2 + Na2SO4 →  BaSO4 + 2NaCl
a)
Double Replacement
b)
Neutralization
c)
Decomposition
d)
Single Replacement
49.

Cl2 + KI --> KCl + I2

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

50.

HCl + NaOH --> NaCl + H2O

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

51.

C + H2 --> CH4

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

52.

A + BC --> B + AC

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

53.

AB + CD --> CB + AD

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

54.

AB --> A + B

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

55.

A + B --> AB

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

56.

When the positive ion of one compound replaces the positive ion of another compound to form two new compounds.

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

57.

One substance breaks down into two or more substances.

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

58.

Two substances combine into 1 substance.

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

59.

What type of reaction does the following equation represent?


HgO --> Hg + O2

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

60.

What type of reaction does the following equation represent?


Na3PO4 + CaCl2 --> Ca3(PO4)2 + NaCl

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

61.

What does the coefficient in a chemical equation represent?

a)

The number of each substance needed

b)

The state of matter of each substance

c)

The number of atoms in a molecule

d)

The number of products formed

62.

Why do equations need to be balanced?

a)

To keep from violating the Law of Conservation of Mass

b)

To ensure the reactants and products have the same mass

c)

To make the equation look neat and organized

d)

To indicate the number of atoms in each substance

63.

What is the Law of Conservation of Mass?

a)

Matter can be created or destroyed

b)

Matter can only change forms

c)

Matter can be converted into energy

d)

Matter can be separated into its constituent elements

64.

How many elements are in C6H12O6?

a)

1

b)

2

c)

3

d)

4

65.

In the compound Mg(NO3)2, how many atoms of nitrogen is present?

a)

1

b)

2

c)

3

d)

6

66.
___C3H8 +___O2 --> ___CO2 + ___H2O
a)
1,5,3,4
b)
2,10,6,8
c)
already balanced
d)
1,5,5,4
67.
__H2O2 --> __H2O + __O2
a)
already balanced
b)
2,1,1
c)
2,2,1
d)
2,1,2
68.
__Al + __Fe3N2 -->__AlN + __Fe
a)
already balanced
b)
4,2,4,6
c)
2,1,2,3
d)
1,2,1,3
69.
__Na + __Cl2 --> __NaCl
a)
1,1,2
b)
2,1,2
c)
2,1,1
d)
already balanced
70.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4

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