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WorksheetsCHEMICAL REACTIONS
Total questions: 15
Worksheet time: 16mins
Name
Class
Date
1.
An _______ reaction is when more thermal energy is absorbed than is released.
a)
endothermic
b)
endergonic
c)
exothermic
d)
exergonic
2.
Energy is _____ when new bonds form.
a)
absorbed
b)
released
c)
lost
d)
gained
3.
Balance this equation: H2 + N2 → NH3
a)
H2 + 4N2 → NH3
b)
H2 + 3N2 → 2NH3
c)
3H2 + N2 → 2NH3
d)
2H2 + 2N2 → 2NH3
4.
2 C5H5 + Fe --> Fe(C5H5)2
a)
single displacement
b)
double displacement
c)
decomposition
d)
synthesis
5.
Which type of reaction requires the activity series?
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement and single replacement
6.
Predict the products of the following reaction: Pb(NO3)2 + 2KI →
a)
PbI2 + K(NO3)
b)
PbK + I(NO3)
c)
no reaction
d)
PbK(NO3) + I2
7.
Predict the products of the following equation: Mg + AgCl →
a)
No reaction
b)
MgAg + Cl2
c)
products are unpredictable
d)
MgCl2 + Ag
8.
A metal is reacted with an acid to produce a salt and a hydrogen gas. What type of reaction has occurred?
a)
neutralization
b)
double replacement
c)
single replacement
d)
synthesis
9.
What are the correct coefficients when this equation is balanced?
KClO3 --> KCl + O2
KClO3 --> KCl + O2
a)
2,2,2
b)
2,2,3
c)
1,2,3
d)
3,3,3
10.
What is the formula of magnesium nitride?
a)
MgN3
b)
Mg2N3
c)
Mg3N2
d)
Mg2N
11.
The electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water
a)
1:1
b)
2:1
c)
4:1
d)
1:2
12.
What type of chemical reaction takes place when fluorine reacts with sodium bromide?
a)
single replacement
b)
double replacement
c)
combustion
d)
synthesis
13.
What is the probable product of a double-replacement reaction?
a)
A new compound and a replaced metal
b)
A new compound and a replaced nonmetal
c)
2 different compounds 1 aqueous and 1 that is a solid, liquid or gas
d)
A single compound
14.
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
15.
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
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