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WorksheetsChemistry-13 Redox reaction preview
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
What is the oxidation state of sulfur in H2S?
a)
-3
b)
-1
c)
-2
d)
+2
2.
The oxidation state of nitrogen in Li3N is ____.
a)
+3
b)
+5
c)
-3
d)
-2
3.
Indicate the oxidation number of phosphorus in H3PO2
a)
-1
b)
+1
c)
+2
d)
+4
4.
What is the oxidation number of Fe in FeO?
a)
+2
b)
-2
c)
0
d)
+1
5.
What substance is oxidized in the following reaction?
4Fe + 3O2 --> 2Fe2O3
4Fe + 3O2 --> 2Fe2O3
a)
Iron
b)
Fluorine
c)
Oxygen
6.
Substance that oxidizes another substance by accepting its electrons.
a)
reducing agent
b)
oxidation number
c)
combustion
d)
oxidizing agent
7.
If an atom loses electrons during a chemical reaction, the atom was:
a)
Oxidized
b)
Reduced
c)
Neutralized
d)
Precipitated
8.
Reduction involves
a)
gaining electrons;
b)
losing electrons;
9.
Which of the following is the product of the reaction of aluminium and oxygen?
a)
aluminium oxide.
b)
metal oxide
c)
aluminium ore
d)
aluminium and oxygen
10.
Which of the following represents a balanced equation?
a)
2N2 + O2 -> N2O
b)
S8 + 12O2 -> 8SO3
c)
H2 + O2 -> 2H2O
d)
H3PO4 -> H4P2O7 + H2O
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