IGCSE Chemistry (0620) Past Papers
Download free Cambridge IGCSE Chemistry past papers, mark schemes, and examiner reports from 2020 to 2025. 18 exam sessions available with question papers for all variants.
About IGCSE Chemistry Exams
IGCSE Chemistry past papers cover atomic structure, bonding, stoichiometry, organic chemistry, electrochemistry, and acids/bases. The exam includes multiple choice, theory papers, and practical/alternative to practical assessments.
Exam tip: Learn to balance equations quickly and practice mole calculations. Organic chemistry naming and reactions are heavily tested in extended papers.
What's included in each session:
Past Papers by Year
Chemistry 0620 Past Papers
LatestChemistry 0620 Past Papers
Chemistry 0620 Past Papers
Chemistry 0620 Past Papers
Chemistry 0620 Past Papers
Chemistry 0620 Past Papers
Which Chemistry topics carry the most marks
We matched every question in the 0620 papers above to its main syllabus topic and totalled the marks. Across all 18 sessions, here is the approximate share of marks each of the biggest Chemistry topics carries — a shortcut to where your past-paper practice and revision pay off most.
Percentages are approximate, tallied from recent years' question papers as a study guide — not an official Cambridge weighting. Always check the current 0620 syllabus for the definitive assessment split.
Where Chemistry students lose the most marks
The same avoidable mistakes cost marks in Chemistry year after year. Watch for these as you work through the papers above — catching them in practice is worth more than another full paper.
- Solids, liquids and gases: List out the common gases (O2, N2, CO2, NH3, Cl2, etc.) and note their distinctive physical and chemical properties.
- Acids and bases: When studying acids, note that ethanoic acid will neutralize alkaline solutions, react with metals to form hydrogen gas, and react with carbonates to form CO2.
- Reactivity series: Understand that concentration impacts reaction rate via collision frequency: more particles in the same volume, more collisions.
- Electrolysis: Name the charge carriers in each case: metals (electrons), ionic solutions (ions), covalent compounds (usually none).
- Calculations: Deploy the formula ΔH = Σ(bonds broken) - Σ(bonds formed), accounting for every single bond in every molecule, multiplied by the number of moles according to the balanced equation.
- Formulae: Drill the correct formulae for common compounds like water (H2O), carbon dioxide (CO2), and sodium chloride (NaCl).
0620 Paper Structure
How to revise with Chemistry past papers
1. Start recent, work backwards
Begin with the newest 2025 papers — they best reflect the current 0620 style and mark scheme wording — then work back through earlier years. The papers change less than students fear, so older sessions are still valuable practice once you've seen the latest format.
2. Sit one paper under timed conditions
Print the question paper, set a timer for the paper's real duration, and answer with no notes. Doing a paper "properly" once teaches you more about pacing and pressure than skimming three papers with the mark scheme open beside you.
3. Mark honestly, then diagnose
Mark against the official 0620 mark scheme and note the topic of every mark you dropped. Patterns show up fast — if the marks you lose cluster in one or two of the high-value topics above, that's your next revision session, not another full paper. Learn to balance equations quickly and practice mole calculations. Organic chemistry naming and reactions are heavily tested in extended papers.
4. Read the examiner report
Each session's examiner report is the highest-value document in the bundle: it names the exact questions that tripped candidates up and what earned the marks. Read it before you re-attempt a paper, then use our Exam Hub to view the question, mark scheme, and report side by side.
Grade thresholds: turning your 0620 mark into a grade
Cambridge doesn't publish fixed grade boundaries in advance. After each session it sets the minimum mark for every grade based on how hard that specific paper turned out to be — a slightly harder paper gets slightly lower thresholds, which keeps grades fair between sessions. That's why the mark you need for an A* in Chemistry shifts a little from one series to the next.
Each session bundle above includes the official grade-threshold (GT) file, so you can convert your practice mark into the grade it would have earned that session. Two practical habits: aim a comfortable buffer above the threshold you're targeting (thresholds drift, so don't practise to the exact boundary), and track your converted grade across several sessions rather than judging yourself on a single paper.
Prepare for Your Chemistry Exam
Past papers work best alongside structured revision. Use our free study resources to master each topic before testing yourself.
Frequently Asked Questions
Where can I download IGCSE Chemistry past papers for free?
Which 0620 papers should I practice?
How do I use 0620 mark schemes effectively?
Pro tip: Use our Exam Hub to view question papers side-by-side with mark schemes or examiner reports. This makes it easy to check your answers and understand exactly what examiners are looking for — all in one view.