Chemistry: Matter and Change

Section 3: Electrolysis

Self Check Quizzes

1
During the electrolysis of molten sodium iodide, sodium ions move ________.
A)to the anode, which is positively charged
B)to the anode, which is negatively charged
C)to the cathode, which is positively charged
D)to the cathode, which is negatively charged
2
Which of the following is not obtained from the electrolysis of an aqueous solution of sodium chloride?
A)Na
B)NaOH
C)Cl2
D)H2
3
The electrolysis of an aqueous sodium chloride solution using inert electrodes produces gaseous chlorine at one electrode. At the other electrode, gaseous hydrogen is produced, and the solution around the electrode becomes basic. Which of the following equations is the correct equation for the cathode half-reaction in this electrolytic cell?
A)2Cl- → Cl2 + 2e-
B)2H2O + 2e- → H2 + 2OH-
C)Cl2 + 2e- → 2Cl-
D)H2 + 2OH- → 2H2O + 2e-
4
In the process shown in the diagram, what products are oxidized and what products are reduced?

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A)Chlorine is oxidized, hydrogen is reduced.
B)Water is oxidized, sodium is reduced.
C)Water is reduced, chlorine and water are oxidized.
D)Water is oxidized, chlorine and water are reduced.
5
The Hall-Heroult process uses huge amounts of ________.

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A)electricity
B)carbon
C)electrolyte
D)carbon dioxide
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