Chapter 17:
Electrochemistry
Practice Test
1.
To prevent corrosion, metal garbage cans and other iron objects are dipped into _____________.
a.
molten zinc
b.
hydrogen peroxide
c.
hydrochloric acid
d.
liquid oxygen
Hint
2.
Some of these electricity-producing devices have platinum electrodes, use hydrogen and oxygen, and produce water.
a.
electrolytic cells
b.
alkaline batteries
c.
lithium batteries
d.
fuel cells
Hint
3.
This reaction takes place at the cathode during the electrolysis of molten magnesium chloride.
a.
Cl
2
+ 2e
-
2Cl
-
b.
Mg
Mg
2+
+ 2e
-
c.
Mg
2+
+ 2e
-
Mg
d.
2Cl
-
Cl
2
+ 2e
-
Hint
4.
What reaction occurs when a strip of tin is immersed in an aqueous calcium nitrate solution?
a.
Sn
Sn
2+
+ 2e
-
b.
None
c.
Ca
Ca
2+
+ 2e
-
d.
Sn
Sn
4+
+ 4e
-
Hint
5.
The _________ storage battery can usually be discharged and recharged more than 500 times.
a.
nicad
b.
anode
c.
alkaline
d.
carbon-zinc
Hint
6.
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
7.
This reaction occurs at the cathode of an electrolytic cell.
a.
reduction
b.
oxidation
c.
decomposition
d.
redox
Hint
8.
A galvanic cell that has been packaged as a portable power source may be called a/an _________.
a.
cathode
b.
battery
c.
ammeter
d.
anode
Hint
9.
This element is sometimes electroplated onto other metals to make them shiny and to improve their hardness, stability, and appearance.
a.
chromium
b.
sodium
c.
magnesium
d.
zinc
Hint
10.
A process in which electricity causes a nonspontaneous chemical reaction is called _________________.
a.
synthesis
b.
hydrolysis
c.
photogenesis
d.
electrolysis
Hint
11.
A/an ____________ can be used to restore charge balance in a galvanic cell.
a.
salt bridge
b.
voltmeter
c.
anode
d.
cathode
Hint
12.
Chemical energy is converted into electrical energy in a _______________.
a.
electrolytic cell
b.
galvanic cell
c.
motor
d.
electrical cell
Hint
13.
The Hall-Heroult process is expensive because it consumes so much ______________.
a.
chlorine
b.
oxygen
c.
electricity
d.
steel
Hint
14.
A lead storage battery contains several cells filled with a solution of ________________.
a.
silver nitrate
b.
sulfuric acid
c.
sodium hydroxide
d.
zinc sulfate
Hint
15.
_____________ forms at the cathode of a Downs cell.
a.
Oxygen gas
b.
Liquid sodium
c.
Chlorine gas
d.
Hydrogen gas
Hint
16.
The anion in an aqueous ammonium nitrate solution is ___________.
a.
NO
3
-
b.
NH
4
+
c.
N
3
-
d.
O
2-
Hint
17.
The cation in an aqueous rubidium chromate solution is ___________.
a.
Cr
3+
b.
Rb
2+
c.
CrO
4
-
d.
Rb
+
Hint
18.
This reaction occurs at the anode of an electrolytic cell.
a.
oxidation
b.
redox
c.
synthesis
d.
reduction
Hint
19.
Potential difference is expressed in _________.
a.
current
b.
amperes
c.
ohms
d.
volts
Hint
20.
A Hall-Heroult electrolytic cell is used to produce _________________.
a.
molten iron
b.
aluminum metal
c.
sodium metal
d.
chlorine gas
Hint
