Question
The flow chart shows part of the process for the manufacture of sulfuric acid and its electrolysis.
What are gases 1, 2 and 3?
Answer/Explanation
Ans:
B
Question
Aqueous copper(II) sulfate is electrolyzed using copper electrodes.
What is the ionic half-equation for the reaction at the cathode?
- Cu → Cu2+ + 2e–
- Cu2+ + 2e– → Cu
- 2H+ + 2e– → H2
- 2O2– → O2 + 4e–
Answer/Explanation
Ans:
B
Question
The diagram shows the electrolysis of concentrated hydrochloric acid and concentrated aqueous sodium chloride using carbon electrodes.
At which electrodes is hydrogen produced?
- electrode 1 only
- electrodes 1 and 3
- electrode 2 only
- electrodes 2 and 4
Answer/Explanation
Ans:
D
Question
Which diagram shows the direction of movement of ions and electrons during the electrolysis of molten sodium chloride?
Answer/Explanation
Ans:
A