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WorksheetsREDOX REACTIONS
Total questions: 8
Worksheet time: 4mins
Name
Class
Date
1.
What is the oxidation number of Cl2?
a)
0
b)
+1
c)
+2
d)
-1
2.
What is the oxidation number of Sulfide ion, S2-?
a)
-2
b)
-1
c)
0
d)
+2
3.
What is the oxidation number of oxygen in H2O?
a)
0
b)
+1
c)
+2
d)
-2
4.
What is the oxidation number of phosphorus in phosphate ion, PO43-?
a)
0
b)
+1
c)
+5
d)
-5
5.
What is the oxidation number of sulfur in H2SO4?
a)
0
b)
+1
c)
+4
d)
+6
6.
Which of these chemical reactions is an oxidation-reduction reaction?
a)
CO2 + H2O -> H2CO3
b)
Fe + S -> FeS
c)
AgNO3 + NaCl ->AgCl + NaNO3
d)
H2SO4 + 2NaOH -> Na2SO4 + 2H2O
7.
In which substance does bromine have an oxidation number of +1?
a)
Br2
b)
HBr
c)
HBrO
d)
HBrO2
8.
What happens to the oxidising agent in an oxidation-reduction reaction?
a)
It is oxidised as it gains electrons.
b)
It is oxidised as it loses electrons.
c)
It is reduced as it gains electrons.
d)
It is reduced as it loses electrons.
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