The short answer
Do not choose by raw file count. First confirm the syllabus year and whether you are taking Core or Extended. Then check that a site labels Paper 1 or 2, Paper 3 or 4, and Paper 5 or 6 correctly. A question bank that mixes codes or papers without a clear label can create false confidence.
Use Cambridge as the reference point
The official Cambridge IGCSE Chemistry 0620 page says the qualification covers basic chemical principles, current applications and a strong emphasis on practical skills. The 2026–2028 syllabus PDF lists twelve broad areas, from states of matter and stoichiometry to organic chemistry and experimental techniques.
Cambridge’s public past-paper page is the safest place to confirm paper names and the relationship between question papers, mark schemes and examiner reports. Cambridge notes that the public collection is only a selection, and some older papers may not match the current syllabus. Use the 2026–2028 syllabus for current revision, then use older papers selectively after checking content changes.
Best free archive: PMT
PMT’s past-paper hub provides Chemistry links alongside Biology and Physics and covers CAIE among other boards. It is most useful when you want to sit a real paper, mark it immediately and inspect the official marking language.
For 0620, PMT is especially useful in the middle and final stages of revision. After reviewing a topic such as rates, electrolysis or organic chemistry, work through topic-sorted questions. Later, do a full Paper 3 or 4 with no notes. Keep the mark scheme closed until the end, because reading it while answering turns practice into recognition rather than recall.
Check every downloaded document for the 0620 code and component. PMT is a large multi-board site, so “Chemistry” alone is not a sufficient filter.
Best guided bank: Save My Exams
Save My Exams offers Cambridge Chemistry past papers and IGCSE science topic questions. Its site says resources are created by experienced educators and examiners, which is useful when you need more than a bare answer key.
Use guided questions to fix the recurring 0620 problems that mark schemes expose but do not always teach: incomplete definitions, missing state symbols, confusing observations with conclusions, and calculation working that skips units or significant figures. Save the explanations for after your first attempt. If a resource is subscription-only, decide whether its feedback saves enough time to justify the cost; the free Cambridge and PMT materials still form a complete core workflow.
Best topical filter: exam-mate
exam-mate’s official platform advertises yearly and topical past papers, answer access, an exam builder and MCQ practice. Its product area specifically displays Chemistry 0620 topical material and describes questions with answers from past papers.
This makes exam-mate a practical choice for narrow drills. You can select stoichiometry, acids, qualitative analysis or another area, then build a mixed test once the isolated skill improves. Still, verify the paper code and date range yourself. Topic labels on any third-party site are an index, not a replacement for the Cambridge syllabus. Also distinguish genuine past-paper questions from original exam-style questions if the site offers both.
A 0620 revision plan that works
Start by making a syllabus checklist from the current Cambridge document. For each topic, do a short recall pass, then eight to fifteen topical questions. Record the exact reason for every lost mark: knowledge, equation, calculation, observation, explanation, graph or command word.
Next, rotate components. Paper 1 or 2 builds quick recognition but can hide weak written explanations. Paper 3 or 4 exposes definitions, equations, calculations and unfamiliar contexts. Paper 5 or 6 tests practical planning, measurement, analysis and evaluation. Do not replace one component with another.
Finish with timed full papers and official mark schemes. Reattempt missed questions several days later without looking at your first answer. Grade thresholds are not a substitute for marking accuracy, and a high score on a familiar topical set is not proof that you can handle a mixed paper.
PastPaperPrep’s live IGCSE Chemistry 0620 bank contains real past-paper questions from papers covering recent exam years. Use it when you want to filter by topic, paper, year, session, marks and other available exam details, then turn a weak area into a printable set. It does not replace notes or teaching; it removes the manual work of finding and assembling authentic questions.
Frequently asked questions
Which Chemistry 0620 site is free?
Cambridge’s public papers and PMT are useful free foundations. Save My Exams and exam-mate have a mixture of free and paid material, so check access on the individual resource.
Should I practise Core and Extended questions together?
Only after checking your entry route. Extended students need Core and Supplement content; Core students should not use Extended difficulty as a substitute for learning the assessed Core list.
Are topical papers better than yearly papers?
They serve different purposes. Topical questions repair a skill; yearly papers test transfer, timing and paper balance.
What should I do with a mark scheme I disagree with?
Check the matching question paper, component and variant first. If the issue remains, ask a teacher or consult the examiner report rather than silently changing the marking rule.
Sources and verification
- Cambridge International: IGCSE Chemistry 0620 qualification page
- 2026–2028 syllabus PDF
- public past-paper page
- Physics & Maths Tutor: IGCSE past-paper archive
- Cambridge Chemistry past papers
- IGCSE science topic questions
- exam-mate: topical past papers and exam builder
- PastPaperPrep pricing
- PastPaperPrep question banks