Question 1 (1 point) 
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In a redox reaction, the oxidizing agent
Question 1 options:

1) 

loses electrons and becomes reduced

2) 

gains electrons and becomes reduced

3) 

gains electrons and becomes oxidized

4) 

loses electrons and becomes oxidized
Question 2 (1 point) 
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An atom which gains three electrons undergoes
Question 2 options:

1) 

reduction and its oxidation number increases by 3

2) 

reduction and its oxidation number decreases by 3

3) 

oxidation and its oxidation number increases by 3

4) 

oxidation and its oxidation number decreases by 3
Question 3 (1 point) 
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Consider the following redox equation:



Which of the following statements is false?

Question 3 options:

1) 

The equation is balanced.

2) 

Manganese is reduced.

3) 

Iron is the oxidizing agent.

4) 

Iron is oxidized.
Question 4 (1 point) 
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Consider the following spontaneous redox reactions:

Redox sampler

Which of the following describes the relative strengths of the reducing agents?

Question 4 options:

1) 

X > Y > Z

2) 

Z > Y > X

3) 

X- > Y- > Z-

4) 

Z- > Y- > X-
Question 5 (1 point) 
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A solution of lead(II) nitrate could be safely stored in a container made of
Question 5 options:

1) 

Fe

2) 

Cu

3) 

Zn

4) 

Ni
Question 6 (1 point) 
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What reaction will occur when a solution containing 1.0M MgSO4 and 1.0M CoCl2 is stored in a galvanized (Zn coated) bucket?

Question 6 options:

1) 




2) 




3) 




4) 

None of the above.

5) 



Question 7 (1 point) 
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Which of the following metals can be oxidized by water?
Question 7 options:

1) 

Sn

2) 

Ca

3) 

Ni

4) 

Pb
Question 8 (1 point) 
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The following half-reaction can be balanced in acidic solution:

N2O5 → NH4+

Which of the following appear in the balanced equation?

Question 8 options:

1) 

16e-

2) 

13e-

3) 

18e-

4) 

14e-

5) 

None of the above.
Question 9 (1 point) 
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What is the oxidation number of carbon in the ethanoate ion C2H3O2- ?

Question 9 options:

1) 

+1/2

2) 

-1

3) 

+1

4) 

0
Question 10 (1 point) 
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What is the oxidation number of S in Na2S2O5?
Question 10 options:

1) 

+3

2) 

+1

3) 

+6

4) 

+4

5) 

+8
Question 11 (1 point) 
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In an electrochemical cell, electrons flow from the
Question 11 options:

1) 

anode to the cathode through the external circuit

2) 

cathode to the anode through the external circuit

3) 

cathode to the anode through the salt bridge

4) 

anode to the cathode through the salt bridge
Question 12 (1 point) 
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The E° for a proposed oxidation-reduction reaction is -0.74 V.  This information tells us that the reaction

Question 12 options:

1) 

will occur at a very slow rate

2) 

will not occur spontaneously

3) 

is already at equilibrium

4) 

has a large activation energy
Question 13 (1 point) 
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Consider the following diagram:

Redox diag

As the cell operates, the voltage gradually changes. Which of the following is responsible for this change?

Question 13 options:

1) 

The [Pb2+] is increasing.


2) 

The [Pb2+] is decreasing.


3) 

The [Zn2+] is decreasing.


4) 

The mass of the Pb(s) electrode is decreasing.

Question 14 (1 point) 
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A student constructs three standard electrochemical cells using the metals Pd, Cd and Ga with 1.0 M solutions of their ions. The student then records the voltages of Cell 1 and Cell 2 in the following table. What voltage should Cell 3 produce?

Cell	Anode	Cathode	Voltage (V)
1	Ga	Pd	+1.18
2	Ga	Cd	+0.16
3	Cd	Pd	
Question 14 options:
+1.34 V
Question 15 (1 point) 
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When a metal undergoes corrosion, it
Question 15 options:

1) 

decreases in oxidation number

2) 

acts as an oxidizing agent

3) 

loses electrons

4) 

becomes reduced
Question 16 (1 point) 
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A piece of iron can be prevented from corroding by
Question 16 options:

1) 

placing it in an acidic solution

2) 

attaching a small piece of lead to it

3) 

attaching a small piece of gold to it

4) 

making it a cathode
Question 17 (1 point) 
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An electrolytic cell is a chemical system in which electrical energy is
Question 17 options:

1) 

absorbed during a non-spontaneous reaction

2) 

absorbed during a spontaneous reaction

3) 

produced during a non-spontaneous reaction

4) 

produced during a spontaneous reaction
Question 18 (1 point) 
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The electrolysis of a molten salt involves the migration of
Question 18 options:

1) 

both cations and anions

2) 

electrons only

3) 

anions only

4) 

cations only
Question 19 (1 point) 
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What are the most likely products of the electrolysis of 1.0M MgI2 using inert electrodes?

Question 19 options:

1) 

I2

2) 

Mg

3) 

H2

4) 

O2
Question 20 (1 point) 
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An electrolytic cell differs from an electrochemical cell in that an electrolytic cell

Question 20 options:

1) 

has ions migrating between the electrodes.

2) 

produces an electric current by means of a chemical reaction.

3) 

has oxidation and reduction occurring at the electrodes.

4) 

has negative free energy.

5) 

produces a chemical reaction by means of an electric current.
Question 21 (1 point) 
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When electroplating an iron spoon with silver, the half-reaction taking place on the spoon is
Question 21 options:

1) 

Fe2+(aq) + 2 e-  →  Fe(s)

2) 

Fe(s)  →  Fe2+(aq) + 2 e-

3) 

Ag+(aq) + e-  →  Ag(s)

4) 

Ag(s)  →  Ag+(aq) + e-
Question 22 (1 point) 
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Which of the following best describes a car battery as it is being recharged?

Question 22 options:

1) 

It is an example of a short circuit.

2) 

It is a system moving to a state of lower potential energy.

3) 

It is an electrolytic cell.

4) 

It is an electrochemical cell.

5) 

It's ready to blow!!
Question 23 (1 point) 
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In a reaction, the oxidation number of S changes from 6 to 4.  This information tells us that sulphur has acted as
Question 23 options:

1) 

an oxidizing agent, gaining 2 e-

2) 

an oxidizing agent, losing 2 e-

3) 

a reducing agent, gaining 2 e-

4) 

a reducing agent, losing 2 e-
Question 24 (1 point) 
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In an oxidation-reduction reaction, the reducing agent
Question 24 options:

1) 

decreases in oxidation number

2) 

becomes oxidized

3) 

gains electrons

4) 

undergoes reduction
Question 25 (1 point) 
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In an operating dry cell, the anode
Question 25 options:

1) 

gains mass

2) 

attracts cations

3) 

gives up electrons

4) 

becomes reduced
Question 26 (1 point) 
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Which of the following metals when reacting with 1.0 M Zn2+ at 25°C will produce the greatest voltage?
Question 26 options:

1) 

Mg

2) 

Ag

3) 

Pb

4) 

Al
Question 27 (1 point) 
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An electrolytic process is used to purify impure lead.  The electrodes are

 	Anode	Cathode
A	carbon	impure lead
B	pure lead	carbon
C	pure lead	impure lead
D	impure lead	pure lead
Question 27 options:

1) 

D

2) 

C

3) 

A

4) 

B