Chapter 17:
Electrochemistry
Practice Test
1.
A process in which electricity causes a nonspontaneous chemical reaction is called _________________.
a.
electrolysis
b.
synthesis
c.
photogenesis
d.
hydrolysis
Hint
2.
A galvanic cell that has been packaged as a portable power source may be called a/an _________.
a.
battery
b.
cathode
c.
anode
d.
ammeter
Hint
3.
The anion in an aqueous ammonium nitrate solution is ___________.
a.
O
2-
b.
NH
4
+
c.
N
3
-
d.
NO
3
-
Hint
4.
The carbon rod in the center of a carbon-zinc dry cell serves as the ____________.
a.
electrolyte
b.
anode
c.
cathode
d.
salt bridge
Hint
5.
Chemical energy is converted into electrical energy in a _______________.
a.
electrolytic cell
b.
electrical cell
c.
motor
d.
galvanic cell
Hint
6.
This element is sometimes electroplated onto other metals to make them shiny and to improve their hardness, stability, and appearance.
a.
zinc
b.
sodium
c.
chromium
d.
magnesium
Hint
7.
This reaction occurs at the cathode of an electrolytic cell.
a.
oxidation
b.
redox
c.
decomposition
d.
reduction
Hint
8.
Potential difference is expressed in _________.
a.
amperes
b.
ohms
c.
volts
d.
current
Hint
9.
The cation in an aqueous rubidium chromate solution is ___________.
a.
Rb
2+
b.
Cr
3+
c.
CrO
4
-
d.
Rb
+
Hint
10.
A lead storage battery contains several cells filled with a solution of ________________.
a.
sulfuric acid
b.
sodium hydroxide
c.
silver nitrate
d.
zinc sulfate
Hint
11.
This reaction takes place at the cathode during the electrolysis of molten magnesium chloride.
a.
Mg
2+
+ 2e
-
Mg
b.
2Cl
-
Cl
2
+ 2e
-
c.
Mg
Mg
2+
+ 2e
-
d.
Cl
2
+ 2e
-
2Cl
-
Hint
12.
The _________ storage battery can usually be discharged and recharged more than 500 times.
a.
carbon-zinc
b.
nicad
c.
alkaline
d.
anode
Hint
13.
What is the oxidation half-reaction in a copper-zinc galvanic cell?
a.
2Cl
-
Cl
2
+ 2e
-
b.
O
2
2O
2-
+ 4e
-
c.
Cu
Cu
2+
+ 2e
-
d.
Zn
Zn
2+
+ 2e
-
Hint
14.
A Hall-Heroult electrolytic cell is used to produce _________________.
a.
aluminum metal
b.
molten iron
c.
sodium metal
d.
chlorine gas
Hint
15.
_____________ forms at the cathode of a Downs cell.
a.
Hydrogen gas
b.
Chlorine gas
c.
Oxygen gas
d.
Liquid sodium
Hint
16.
This element is used in pacemaker batteries.
a.
boron
b.
arsenic
c.
potassium
d.
lithium
Hint
17.
Alessandro Volta proved that electricity can be generated by __________.
a. gold foil
b. frogs' legs
c. dissimilar metals
d. solution
Hint
18.
This reaction occurs at the anode of an electrolytic cell.
a.
oxidation
b.
reduction
c.
redox
d.
synthesis
Hint
19.
A/an ____________ can be used to restore charge balance in a galvanic cell.
a.
salt bridge
b.
voltmeter
c.
cathode
d.
anode
Hint
20.
What reaction occurs when a strip of tin is immersed in an aqueous calcium nitrate solution?
a.
Sn
Sn
2+
+ 2e
-
b.
Ca
Ca
2+
+ 2e
-
c.
None
d.
Sn
Sn
4+
+ 4e
-
Hint
