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WorksheetsAssigning Oxidation States
Total questions: 20
Worksheet time: 20mins
Name
Class
Date
1.
What is the oxidation number of Fe in FeO?
a)
+1
b)
-1
c)
+2
d)
-2
2.
What is the oxidation number of O in CO2?
a)
+2
b)
-1
c)
+4
d)
-2
3.
What is the oxidation number of N in NO21- ?
a)
-3
b)
+4
c)
-2
d)
+3
4.
The sum of all oxidation numbers in a neutral compound is ___.
a)
0
b)
1
c)
-1
d)
depends on the compound
5.
What is the oxidation of C in CH4?
a)
-4
b)
-1
c)
+4
d)
+1
6.
What is oxidation number of Mn in MnO2 ?
a)
0
b)
+2
c)
-2
d)
+4
7.
What is the oxidation number of Ca in Ca3N2?
a)
+3
b)
+2
c)
-3
d)
-2
8.
What is the oxidation number of S in SO4 2- ?
a)
-2
b)
+2
c)
+6
d)
-4
9.
What is oxidation number of Cr in
Cr2O72-?
Cr2O72-?
a)
-2
b)
+2
c)
+6
d)
+12
10.
What is oxidation number of P in K3PO4?
a)
+1
b)
+5
c)
-2
d)
0
11.
What is the oxidation state of Cl in ClO- ?
a)
0
b)
+1
c)
-1
d)
+2
12.
What is the oxidation state of Cu in CuO?
a)
-1
b)
-2
c)
+2
d)
0
13.
What is the oxidation state of H in H2?
a)
+2
b)
+1
c)
0
d)
None of the above
14.
What is the oxidation state of Pb in PbO ?
a)
+2
b)
+4
c)
0
d)
-2
15.
C in CO32-?
a)
-4
b)
+2
c)
0
d)
+4
16.
S in HSO4- ?
a)
+5
b)
-6
c)
+6
d)
+2
17.
H in NaH ?
a)
+1
b)
0
c)
-1
d)
None of the above
18.
Is this oxidation or reduction: SO42- becomes SO4
a)
Oxidation
b)
Reduction
c)
Neither
d)
Both
19.
What is oxidation number of H in H2O?
a)
0
b)
-2
c)
-1
d)
+1
20.
What is oxidation number of Cr in Cr2O72-?
a)
-2
b)
+2
c)
+6
d)
+12
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