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WorksheetsRedox Reactions
Total questions: 11
Worksheet time: 13mins
Name
Class
Date
1.
Is calcium oxidized or reduced in the following reaction?
2 CaO--> 2 Ca + O2
2 CaO--> 2 Ca + O2
a)
Oxidized
b)
Reduced
2.
Reduction is the ___________ of electrons.
a)
loss
b)
gain
c)
sharing
d)
transfer
3.
Which of the following represents oxidation?
a)
C → CH4
b)
Fe3+ → Fe2+
c)
Cl2 → 2Cl-
d)
Zn → ZnO
4.
Substance that oxidizes another substance by accepting its electrons.
a)
reducing agent
b)
oxidation number
c)
disproportionation
d)
oxidizing agent
5.
If in a reaction, copper is reduced; its number of electrons has:
a)
Increased
b)
Decreased
c)
Remained Constant
d)
Varies Randomly
6.
If an atom loses electrons during a chemical reaction, the atom was:
a)
Oxidized
b)
Reduced
c)
Neutralized
d)
Precipitated
7.
In the reaction
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
a)
Reduced
b)
Synthesized
c)
Oxidized
d)
None of the above
8.
In the reaction Zn + H2O --> ZnO2 + H2
which element, if any, is oxidized?
which element, if any, is oxidized?
a)
Zinc
b)
Hydrogen
c)
Oxygen
d)
None
9.
Another name for a "oxidation-reduction" reaction is
a)
chemical reaction
b)
neutralization reaction
c)
redox reaction
d)
nuclear reaction
10.
What substance is oxidized in the following reaction?
4Fe + 3O2 --> 2Fe2O3
4Fe + 3O2 --> 2Fe2O3
a)
Iron
b)
Fluorine
c)
Oxygen
11.
Is calcium oxidized or reduced in the following reaction?
2CaO--> 2Ca + O2
2CaO--> 2Ca + O2
a)
Oxidized
b)
Reduced
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