IGCSE Chemistry (Cambridge code 0620) rewards students who understand the examiner's language — precise terminology, correctly balanced equations, and specific application of concepts. This guide gives you free access to all 0620 past papers and AI-powered explanations that teach you to answer the way Cambridge examiners mark.
Quick Answer:
IGCSE Chemistry 0620 past papers are free at Aixampapers.com, with AI explanations for every question — including equation writing, organic mechanisms, and electrolysis product predictions that mark schemes rarely explain clearly enough.
IGCSE Chemistry 0620 — Paper Structure
| Paper | Tier | Duration | Marks | Format |
|---|---|---|---|---|
| Paper 1 | Core + Extended | 45 min | 40 | Multiple choice |
| Paper 2 | Core | 1 hr 15 min | 80 | Structured questions |
| Paper 4 | Extended | 1 hr 15 min | 80 | Structured questions |
| Paper 6 | Core + Extended | 1 hour | 40 | Alternative to Practical |
IGCSE Chemistry 0620 — Full Syllabus Topics
States of Matter and Atomic Structure
- Particle theory, diffusion, Brownian motion
- Atomic number, mass number, isotopes, electronic configuration
Bonding and Structure
- Ionic bonding: formation, giant ionic lattice, properties
- Covalent bonding: single and double bonds, dot-and-cross diagrams
- Simple molecular vs giant covalent structures
- Metallic bonding
Stoichiometry and Calculations
- Moles, relative formula mass, Avogadro's constant
- Empirical and molecular formula
- Mole calculations: mass, volume, concentration
- Percentage yield and purity
Electrochemistry
- Electrolysis: products at cathode and anode
- Electrolysis of brine, copper sulfate, dilute acids
- Electrode equations (half-equations)
- Electroplating
Chemical Energetics
- Exothermic and endothermic reactions
- Energy level diagrams, bond energies
Reaction Rates and Equilibrium
- Rate factors: concentration, surface area, temperature, catalysts
- Collision theory
- Reversible reactions, Le Chatelier's principle (Extended)
- Haber process, Contact process
Acids, Bases and Salts
- pH scale, neutralisation, indicators
- Reactions of acids with metals, oxides, carbonates, alkalis
- Preparation of soluble and insoluble salts
- Titration calculations
Organic Chemistry
- Alkanes: naming, combustion, substitution
- Alkenes: addition reactions, polymerisation
- Ethanol: fermentation, hydration
- Carboxylic acids, esters
- Condensation polymerisation (Extended)
Frequently Asked Questions
Where can I download IGCSE Chemistry 0620 past papers for free?
Aixampapers.com provides all IGCSE Chemistry 0620 past papers free, with marking schemes and AI explanations for every question — including equation writing, organic chemistry, and electrolysis product prediction.
How do I get better at writing balanced equations in IGCSE Chemistry?
Practise writing equations daily — not just when you encounter them in past papers. Use the Aixampapers AI tutor to check your equations and get corrections with explanations. Focus on: state symbols, correct formulae for all species, balanced atoms and charges.
What is the hardest topic in IGCSE Chemistry 0620?
Most students find organic chemistry (especially structural formulae for reactions), mole calculations, and electrolysis product prediction the hardest topics. These three areas appear in almost every exam session and reward systematic practice over cramming.
Is Paper 6 important for IGCSE Chemistry?
Yes. Paper 6 is 40 marks (roughly 20% of total) and tests practical skills: planning experiments, interpreting data, identifying errors. Most students underinvest here. Practising Paper 6 questions specifically is one of the most efficient ways to improve your overall grade.