ZIMSEC O-Level Combined Science
7.2.5.2Chemical changes and redox reactions
Chemical changes and redox reactions in ZIMSEC O-Level Combined Science: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic62 practice questions3 lessons
Overview
Forms 2 and 3.
Learning objectives
What the syllabus expects you to be able to do.
- 7.2.5.2.1Distinguish between physical and chemical changes and write simple word equations.
- 7.2.5.2.2Define oxidation and reduction in terms of oxygen, electrons and hydrogen.
Lessons
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Oxidation and reduction
35 min
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Physical and chemical changes
15 min
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Word, symbol and ionic equations
30 min
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Sample question
A sample question on this topic. Answer it, check it, then read the worked answer.
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