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Multiple Choice Quiz - Galvanic Cells and Corrosion of Metals
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Self-Assessment Quiz

1
Which represents an oxidation reaction?
A)AgNO3 + KBr ® AgBr + KNO3
B)Br2 + 2 Na ® 2 NaBr
C)Cl2 + 2e-® 2 Cl-
D)K ® K+ + e-
2
Which represents a reduction reaction?
A)AgNO3 + KBr ® AgBr + KNO3
B)Br2 + 2 Na ® 2 NaBr
C)Cl2 + 2e-® 2 Cl-
D)K ® K+ + e-
3
Which reaction is an oxidation-reduction reaction?
A)AgNO3 + KBr ® AgBr + KNO3
B)Br2 + 2 Na ® 2 NaBr
C)Cl2 + 2e-® 2 Cl-
D)K ® K+ + e-
4
Which reaction demonstrates no oxidation or reduction?
A)AgNO3 + KBr ® AgBr + KNO3
B)Br2 + 2 Na ® 2 NaBr
C)Cl2 + 2e-® 2 Cl-
D)K ® K+ + e-
5
In the following reaction; Cu(5) + 4 HNO3(aq) ® Cu(NO3)2(aq) + 2 H2O(l) + 2 NO2(g) what is oxidized?
A)Cu
B)H
C)N
D)O
E)nothing
6
In the following reaction; Cu(5) + 4 HNO3(aq) ® Cu(NO3)2(aq) + 2 H2O(l) + 2 NO2(g) what is reduced?
A)Cu
B)H
C)N
D)O
E)nothing
7
In the following reaction; Cu(5) + 4 HNO3(aq) ® Cu(NO3)2(aq) + 2 H2O(l) + 2 NO2(g) what is the oxidizing agent?
A)Cu
B)HNO3
C)Cu(NO3)2
D)H2O
E)NO2
8
In the following reaction; Cu(5) + 4 HNO3(aq) ® Cu(NO3)2(aq) + 2 H2O(l) + 2 NO2(g) what is the reducing agent?
A)Cu
B)HNO3
C)Cu(NO3)2
D)H2O
E)NO2
9
In the electrolysis of water, which reaction occurs at the cathode?
A)2 H2(g) + O2(g) ® 2 H2O(g)
B)2 H2 O(l)® 2 H2(g) + O2 (g)
C)2 H2O(l) ® 4H+(aq) + 2 0-2(aq)
D)2 0-2(aq) ® O2(g) + 4e-
E)2 H+(aq) + 2e-® H2(g)
10
Which equation represents an oxidation reaction?
A)AgNO3 + NaCl ® AgCl + NaNO3
B)Br2 + 2 Na ® 2 NaBr
C)Cl2 + 2 e-® 2 Cl-
D)K ® K+ + e-
11
Which represents a reduction reaction?
A)AgNO3 + NaCl ® AgCl + NaNO3
B)Br2 + 2 Na ® 2 NaBr
C)Cl2 + 2 e-® 2 Cl-
D)K ® K+ + e-
12
Which reaction is an oxidation-reduction reaction?
A)AgNO3 + NaCl ® AgCl + NaNO3
B)Br2 + 2 Na ® 2 NaBr
C)Cl2 + 2 e-® 2 Cl-
D)K ® K+ + e-
13
Which reaction demonstrates no oxidation or reduction?
A)AgNO3 + NaCl ® AgCl + NaNO3
B)Br2 + 2 Na ® 2 NaBr
C)Cl2 + 2 e-® 2 Cl-
D)K ® K+ + e-
14
In the following reaction Cu(s) + 4 HNO3(aq) ® Cu(NO3)2(aq) + 2 H2O(l) + 2 NO2(g) what is oxidized?
A)Cu
B)H
C)N
D)O
E)nothing
15
In the following reaction Cu(s) + 4 HNO3(aq) ® Cu(NO3)2(aq) + 2 H2O(l) + 2 NO2(g) what is reduced?
A)Cu
B)H
C)N
D)O
E)nothing
16
In the following reaction Cu(s) + 4 HNO3(aq) ® Cu(NO3)2(aq) + 2 H2O(l) + 2 NO2(g) what is the oxidizing agent?
A)Cu
B)H
C)N
D)O
E)nothing
17
In the following reaction Cu(s) + 4 HNO3(aq) ® Cu(NO3)2(aq) + 2 H2O(l) + 2 NO2(g) what is the reducing agent?
A)Cu
B)H
C)N
D)O
E)nothing
18
In the electrolysis of water, which reaction occurs at the cathode?
A)2 H2 + O2® 2 H2O
B)2 H20 ® 2 H2 + O2
C)2 H2O ® 4 H+ + 2 0-2
D)2 0-2® O2 + 4 e-
E)2 H+ + 2 e-® H2
19
What is the oxidation half cell reaction for the electrolysis of sodium chloride?

2 NaCl(l)DC Elect.Heat 2 Na(l) + Cl2(g)

A)2 NaCl ® 2 Na + Cl2
B)2 Cl-® Cl2 + 2 e-
C)Cl-® Cl + e-
D)2 Na+ + 2 e-® 2 Na
E)None of these
20
What reaction occurs when a zinc bar in a Zn(NO3)2 solution correctly connected to a lead bar in a Pb(NO3)2 solution to form a voltaic cell.
A)more Zn and more Pb are formed
B)more Zn and more Pb+2 are formed
C)more Zn+2 and more Pb are formed
D)more Zn+2 and more Pb+2 are formed
21
Match the equation and the process that occur at the cathode when iron hinges are plated with copper.
A)reduction, Cu(s)® Cu+2(aq) + 2 e-
B)reduction, Cu+2 + 2 e-® Cu(s)
C)oxidation, Cu(s)® Cu+2(aq) + 2 e-
D)oxidation, Cu+2 (aq) + 2 e-® Cu(s)





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