QCE Chemistry EA Practice Units 3 & 4
Practice questions on chemical equilibrium, oxidation-reduction, organic materials, and chemical synthesis.
QCE Chemistry Units 3 and 4 cover chemical equilibrium systems, oxidation and reduction, organic materials, and chemical synthesis and design. The EA contributes 25% of your subject result and tests your ability to solve problems, interpret experimental data, and explain chemical concepts. Revizi’s practice material targets the specific content and cognitive demands of the QCAA syllabus.
External Assessment: External assessments (EAs) are centrally set examinations developed by QCAA for each General subject. For most subjects, the EA contributes 25% of the overall subject result, with the remaining 75% coming from three internal assessments (IA1, IA2, IA3). For Chemistry, the EA covers Units 3 and 4 and typically includes calculations, data interpretation, and extended explanations of chemical processes.
Topics Covered
Unit 3 Topic 1: Chemical equilibrium systems
- Dynamic equilibrium concepts
- Le Chatelier’s principle
- Equilibrium constants and calculations
- Industrial applications
Unit 3 Topic 2: Oxidation and reduction
- Oxidation states and redox equations
- Electrochemical cells
- Corrosion and its prevention
- Electrolysis applications
Unit 4 Topic 1: Properties and structures of organic materials
- Naming and classification of organic compounds
- Functional groups and isomerism
- Physical and chemical properties
- Polymers and biomolecules
Unit 4 Topic 2: Chemical synthesis and design
- Reaction pathways and organic synthesis
- Green chemistry principles
- Analytical techniques
- Drug design and pharmaceutical chemistry
Question Types
Multiple-Choice Questions
Practice MCQs covering Unit 3 and 4 content from the QCAA syllabus.
Short Response Questions
Build technique with 2–5 mark responses requiring precise, evidence-based answers.
Extended Response
Practice 8–15 mark essays requiring structured arguments and analysis.
Stimulus-Based Questions
Analyse data, case studies and source material in context.
How Revizi Helps
QCAA Syllabus Alignment
Every question maps to QCAA syllabus content from Units 3 & 4.
Spaced Repetition
Weak areas are automatically scheduled for review to build long-term retention.
Performance Tracking
Monitor your accuracy across units and topics to prioritise remaining study time.
Related Practice Pages
Frequently Asked Questions
How much does the QCE Chemistry EA count?
The external assessment contributes 25% of your overall subject result. The remaining 75% comes from internal assessments.
What format is the QCE Chemistry EA?
The EA includes multiple-choice, short-response with calculations, and extended-response questions covering Units 3 and 4 content.
Are these actual past EA questions?
No. Revizi generates original practice questions aligned to QCAA syllabus content for Chemistry Units 3 & 4.
Last updated: March 2026