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WorksheetsPredicting Synthesis and Decomposition
Total questions: 21
Worksheet time: 27mins
Name
Class
Date
1.
A decomposition reaction can be represented as _____________________.
a)
AB → A + B
b)
A + B → AB
c)
AB + CD → AC + BD
d)
A + BC → B + AC
2.
A chemical change in which a single compound breaks down into two or more simpler products is called a ______________________.
a)
single-replacement reaction
b)
synthesis reaction
c)
double-replacement reaction
d)
decomposition reaction
3.
This chemical equation for mercury oxide is an example of what type of reaction?
2HgO → 2Hg + O2
2HgO → 2Hg + O2
a)
decomposition reaction
b)
synthesis reaction
c)
combustion reaction
d)
Marvin the Martian reaction
4.
Choose the balanced chemical equation for the formation of iron oxide.
a)
2Fe + O2 → 2FeO2
b)
Fe + O2 → FeO2
c)
4Fe + 3O2 → 2Fe2O3
d)
4Fe + O2 → 2FeO2
5.
A chemical change in which two or more substances react to form a new substance is a ____________________________.
a)
decomposition reaction
b)
synthesis reaction
c)
double displacement reaction
d)
combustion reaction
6.
A synthesis reaction can be represented as ________________________.
a)
AB + CD → AC + BD
b)
AB → A + B
c)
A + B → AB
d)
A + BC → B + AC
7.
This chemical equation for magnesium oxide is an example of what type of reaction?
2Mg + O2 → 2MgO
2Mg + O2 → 2MgO
a)
decomposition reaction
b)
synthesis reaction
c)
single displacement reaction
d)
combustion reaction
8.
Which of the following is an example of synthesis?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
9.
Which chemical reaction breaks down into 2 substances?
a)
Double displacement
b)
Single displacement
c)
Synthesis
d)
Decomposition
10.
What type of chemical reaction is this one?
C2H2 + O2 --> CO2 + H2O
C2H2 + O2 --> CO2 + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement
11.
Why is Cl2 + KI → KCl + I2 not a synthesis reaction?
a)
Oxygen is not a reactant in this reaction.
b)
The reaction has more than one reactant.
c)
Oxygen is not a product in this reaction.
d)
The reaction has more than one product.
12.
2 C5H5 + Fe --> Fe(C5H5)2
a)
single displacement
b)
double displacement
c)
decomposition
d)
synthesis
13.
Which of the following is an example of synthesis?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
14.
Mg + N2 →Mg3N2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
15.
What is the product in the following chemical equation?
H2 + O2 -->
H2 + O2 -->
a)
H2
b)
O2
c)
H2 + O2
d)
H2O
16.
Which reaction type is the following:
C5H10O4 + O2 --> CO2 + H2O
C5H10O4 + O2 --> CO2 + H2O
a)
Decomposition
b)
Single Replacement
c)
Combustion
d)
Double Replacement
17.
Which chemical reaction forms Carbon Dioxide and Water?
a)
Double Replacement
b)
Single Replacement
c)
Combustion
d)
Decomposition
18.
The following is what type of reaction:
NH3 + HCl → NH4Cl
NH3 + HCl → NH4Cl
a)
Synthesis
b)
Decomposition
c)
Single Replacement Replacement
d)
Double Replacement Replacement
19.
Balance this equation:
2Li + Cl2 → LiCl
2Li + Cl2 → LiCl
a)
2Li + Cl2 → 4LiCl2
b)
2Li + Cl2 → LiCl2
c)
2Li + Cl2 → 2LiCl
d)
2Li + 2Cl2 → 2 LiCl2
20.
Write the product:
Mg + N2 --> ?
Mg + N2 --> ?
a)
Mg3N2
b)
Mg+N+N
c)
MgN
d)
MgN2
21.
Write the product for this synthesis reaction:
P4 + O2 -->
P4 + O2 -->
a)
P2O3
b)
O3P2
c)
P4 + O2
d)
P2 + O3
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