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WorksheetsChemical Reactions
Total questions: 20
Worksheet time: 33mins
Name
Class
Date
1.
Which is the name of the kind of solid substance formed in this figure?
a)
aqueous
b)
precipitate
c)
acid
d)
synthesis
2.
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
3.
Magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen gas this happens because?
a)
Magnesium is higher on the reactivity series then hydrogen
b)
magnesium is more reactive than hydrogen
c)
magnesium is able to break the bond between HCl and form MgCl2
d)
both b and c are correct
4.
Which of the following compounds will not disassociate in water?
a)
NaCl
b)
PbCl2
c)
MgNO3
d)
Na2SO4
5.
Describes the number of molecules in a compound and is used to balance a chemical reaction.
a)
coefficient
b)
subscript
c)
superscript
d)
SI unit
6.
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
7.
Provides evidence that a chemical reaction has occurred.
a)
dissolving
b)
melting
c)
formation of a gas
d)
bending
8.
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
9.
What type of chemical reaction takes place when fluorine reacts with sodium bromide?
a)
single replacement
b)
double replacement
c)
combustion
d)
synthesis
10.
Which reaction between halogens and halide salts will occur?
a)
F2(g) + FeI2(aq) → FeF2(aq) + I2 (g)
b)
Cl2(g) + SrF2(aq) → SrCl2(aq) + F2(g)
c)
I2(g) + MgBr2(aq) → MnI2(aq) + Br2(g)
d)
Br2(l) + CoCl2(aq) → CoBr2(aq) + Cl2(g)
11.
A chemical reaction that shows the formation of a solid and identifies the spectator ions
a)
net ionic equation
b)
double replacement
c)
ionic equation
d)
dissociation
12.
Predict the following reaction
NaCl + Ca(NO3)2 -->
NaCl + Ca(NO3)2 -->
a)
no reaction both products are aqueous
b)
Calcium chloride and sodium nitrate are produced
c)
sodium nitrate is a solid formed
d)
calcium chloride is the solid formed
13.
A compound is reacted and forms two new substances. What type of reaction is this?
a)
combustion
b)
synthesis
c)
decomposition
d)
single replacement
14.
Describes the number of atoms in a compound of each element.
a)
coefficient
b)
superscript
c)
subscript
d)
SI unit
15.
The word oxidation describes
a)
gain of electrons
b)
loss of electrons
c)
number of electrons remains the same
d)
number of electrons transfered
16.
The word reduction describes
a)
gain of electrons
b)
loss of electrons
c)
number of electrons remains the same
d)
transfer of electrons
17.
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
18.
Which half reaction shows the element being reduced. In the following reaction.
2Na + Cl2 --> 2NaCl
2Na + Cl2 --> 2NaCl
a)
Na0 --> Na+1 + 1e-
b)
Cl20 + 2e- --> 2Cl-
c)
Na0 + 1e- --> Na+1
d)
Cl20 --> 2Cl- + 2e-
19.
Potassium iodide is a catalyst in a chemical reaction where would this be placed when writing the chemical reaction?
a)
product side
b)
reactant side
c)
above the arrow
d)
left out
20.
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
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