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WorksheetsNaming and Balancing Chemical Reactions Review
Total questions: 25
Worksheet time: 17mins
Name
Class
Date
1.
Balance the following reaction: H2O ---> H2 + 02.
a)
1,1,1
b)
1,2,1
c)
2,2,1
d)
1,2,2
2.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
3.
In chemical reactions, the law of conservation of mass is......
a)
disobeyed
b)
does not apply
c)
obeyed
d)
used sometime
4.
Balance this equation, Ca + H2O --> CaO + H2
a)
Ca + 2H2O --> CaO + 2H2
b)
2Ca + H2O --> CaO + H2
c)
Ca + H2O --> CaO + H2
d)
Cannot be balanced
5.
Balance this equation, Al2O3 ---> Al + O2
a)
Cannot be balanced
b)
2Al2O3 ---> 2Al + 3O2
c)
2Al2O3 ---> 4Al + 3O2
d)
3Al2O3 ---> 2Al + O2
6.
Name this reaction, CO2 + H2O --> H2CO3
a)
Decomposition
b)
Single Replacement
c)
Synthesis
d)
Combustion
7.
Name this reaction, C4H12 + O2 --> H2O + CO2
a)
Decomposition
b)
Single Replacement
c)
Double Replacement
d)
Combustion
8.
Name this reaction, Cl2 + 2KI --> I2 + 2KCl
a)
Synthesis
b)
Single Replacement
c)
Double Replacement
d)
Decomposition
9.
Balance this equation: H2 + N2 → NH3
a)
H2 + 4N2 → NH3
b)
H2 + 3N2 → 2NH3
c)
3H2 + N2 → 2NH3
d)
2H2 + 2N2 → 2NH3
10.
Which is a Synthesis Reaction?
a)
A + B ----> AB
b)
AB -----> A + B
c)
AB + CD ----> AC +BC
d)
AB+ C ----> AC + B
11.
Which is a Decomposition Reaction?
a)
AB --> A + B
b)
ab ----> a + B
c)
AB + CD ----> AC +BC
d)
AB+ C ----> AC + B
12.
A reaction that occurs when two or more elements or compounds combine to make a more complex substance is called
a)
double replacement
b)
decomposition
c)
synthesis
d)
single replacement
13.
Balance this equation: H2 + N2 → NH3
a)
H2 + 4N2 → NH3
b)
H2 + 3N2 → 2NH3
c)
3H2 + N2 → 2NH3
d)
2H2 + 2N2 → 2NH3
14.
Occurs when one element replaces another one in a compound
a)
Synthesis
b)
Single replacement
c)
Double replacement
d)
Decomposition
15.
Compounds break down into simpler substances in this type of reaction.....
a)
Double Replacement
b)
Single Replacement
c)
Synthesis
d)
Decomposition
16.
This image represents
a)
a double replacement reaction
b)
a decomposition reaction
c)
a single replacement reaction
d)
a complex compound reaction
17.
This picture represents
a)
Synthesis
b)
Double Replacement
c)
Single Replacement
d)
Decomposition
18.
Hydrocarbon + Oxygen = Carbon Dioxide + Water
a)
Decomposition
b)
Combustion
c)
Single Replacement
d)
Double Replacement
19.
_AgNO3 + _Cu--->_Cu(NO3)2 + _Ag
a)
2 AgNO3 + 2 Cu---> 3 Cu(NO3)2 + 1 Ag
b)
2 AgNO3 + 1 Cu---> 1 Cu(NO3)2 + 2 Ag
c)
1 AgNO3 + 2 Cu--->2 Cu(NO3)2 + 1 Ag
d)
3 AgNO3 + 2 Cu--->3 Cu(NO3)2 + 2 Ag
20.
This picture represents
a)
Synthesis
b)
Double Replacement
c)
Single Replacement
d)
Decomposition
21.
Balance the following chemical reaction: _CoBr3+_CsOH--> _Co(OH)3+_CsBr
a)
2,3,2,3
b)
3,1,3,1
c)
2,6,2,6
d)
1,3,1,3
22.
Which of the following chemical reactions is balanced correctly?
a)
3BaBr2+2Mg3PO4 --> Ba3(PO4)2+ 6MgBr
b)
F2+4NaSH--> 2NaF+S2+H2S
c)
Al2(Cr2O7)3+6NH4Cl--> 2AlCl3+3(NH4)2Cr2O7
d)
Rb+Cl2-->3RbCl
23.
NaI +BaCl2 -----> NaCl +BaI2 is an example of?
a)
Combustion
b)
Single replacement
c)
Double replacement
d)
Decomposition
24.
Name this reaction: NaI +Cl2 -----> NaCl +I2
a)
combustion
b)
Single replacement
c)
Double replacement
d)
Synthesis
25.
CaO +Mg -----> MgO +Ca ,This is an example of:
a)
Double displacement
b)
Single displacement
c)
Synthesis
d)
Combustion
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