ZIMSEC O-Level Combined Science
7.2.4.3Gases from air and electrolysis
Gases from air and electrolysis in ZIMSEC O-Level Combined Science: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic75 practice questions4 lessons
Overview
Form 3.
Learning objectives
What the syllabus expects you to be able to do.
- 7.2.4.3.1Outline the production of nitrogen and oxygen from liquid air.
- 7.2.4.3.2Define electrolysis, label an electrolytic cell and describe the electrolysis of molten lead bromide.
- 7.2.4.3.3Describe the electrolysis of water and state the uses of hydrogen and oxygen.
- 7.2.4.3.4Describe copper electroplating and give reasons for electroplating.
Lessons
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Electrolysis of aqueous solutions
40 min
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Electrolysis: principles and molten compounds
35 min
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Electroplating and the purification of copper
35 min
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Liquefaction and fractional distillation of air
30 min
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Sample question
A sample question on this topic. Answer it, check it, then read the worked answer.
Turn Gases from air and electrolysis into a strength.
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