Pearson Edexcel International GCSE Chemistry questions by topic
Pearson Edexcel International GCSE Chemistry (4CH1) is assessed in two papers, 1C and 2C. ALN groups questions by specification section, so you can, for instance, collect calculation questions on formulae and equations, or every chemical tests question, from several exam series.
Step-by-step model answers
406 of 406 questions in this course have a model answer that walks through how to earn each mark, not just what the mark scheme lists. More are added paper by paper.
See a real example- 406 questions
- 46 past papers
- 14 exam series, June 2019 to June 2025
- Paper Analysis for 46 of 46 papers
The Free plan includes a daily allowance of questions with their mark schemes. Questions are shown only after you log in.
Topics in this course
Specification headings, with how many ALN questions are matched to each. A question can test more than one heading.
- 1 · Principles of chemistry313 questions
- 2 · Inorganic chemistry208 questions
- 3 · Physical chemistry94 questions
- 4 · Organic chemistry98 questions
Most-examined topics
From Paper Analysis: the sub-sections that came up in the largest share of the papers we have analysed. These are past counts, not predictions.
- Chemical formulae, equations and calculationsPrinciples of chemistry · in 23 of 23 analysed Paper 1C papers, about 61 marks when it appears
- Chemical testsInorganic chemistry · in 23 of 23 analysed Paper 1C papers, about 23 marks when it appears
- Reactivity seriesInorganic chemistry · in 23 of 23 analysed Paper 1C papers, about 19 marks when it appears
- Covalent bondingPrinciples of chemistry · in 22 of 23 analysed Paper 1C papers, about 18 marks when it appears
- Crude oilOrganic chemistry · in 21 of 23 analysed Paper 1C papers, about 18 marks when it appears
The full breakdown by specification point, with the questions behind each count, is in Paper Analysis on the Basic and Premium plans.
Model answers by paper
Counts update automatically as papers and model answers are added. Recent papers appear once the exam board has released them publicly.
| Paper | With model answers | Questions | Past papers | In Paper Analysis |
|---|---|---|---|---|
| Paper 1C | 243 (100%) | 243 | 23 | 23 of 23 |
| Paper 2C | 163 (100%) | 163 | 23 | 23 of 23 |