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WorksheetsOxidation numbers
Total questions: 10
Worksheet time: 4mins
Name
Class
Date
1.
What is the oxidation number of oxygen in ozone molecule
a)
o
b)
+1
c)
-1
d)
+2
e)
-2
2.
What is the oxidation number of oxygen in oxide ion?
a)
0
b)
-1
c)
+1
d)
-2
e)
+2
3.
The oxidation number of sodium in sodium chloride is
a)
0
b)
+1
c)
-1
d)
-2
e)
+2
4.
What is the oxidation number of nitrogen in ammonia
a)
+3
b)
-3
c)
+2
d)
-2
5.
The oxidation number of nitrogen in nitric acid is
a)
+5
b)
+3
c)
+1
d)
-3
6.
Oxidation number of manganese in MnO4- ion is
a)
+6
b)
+7
c)
+5
d)
-6
7.
ON of Sn in SnCl4 is
a)
+1
b)
-4
c)
+4
d)
-1
8.
ON of Mn in MnSO4
a)
-2
b)
-1
c)
0
d)
+1
e)
+2
9.
In CO2, the ON of O is
a)
+4
b)
+2
c)
-4
d)
-2
10.
A redox reaction involves
a)
Increase and decrease in oxidation number
b)
transfer of electrons
c)
neutralization of hydrogen ions
d)
Reaction with oxygen
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