WorksheetsOxidation Number
Total questions: 10
Worksheet time: 14mins
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.
A chemical reaction that involves a gain/loss of electrons is called:
a)
Double Replacement
b)
Neutralization
c)
Oxidation-Reduction
d)
Hydrolysis
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.
The sum of all oxidation numbers in a neutral compound is ___.
a)
0
b)
1
c)
-1
d)
depends on the compound
8.
Which of the following compounds is NOT an ionic compound?
a)
NaCl
b)
NH3
c)
Fe2O3
d)
HCl
9.
What element's don't have oxidation numbers?
a)
alkali metals
b)
noble gases
c)
halogens
d)
alkaline earth metals
10.
What is oxidation number of Mn in MnO2 ?
a)
0
b)
+2
c)
-2
d)
+4
100 %
