IB Chemistry SL · 2025
Chemistry SL Paper 2
278 past paper questions from 9 papers across 4 exam sessions. See what repeats, then practise the same skills with AI marking.
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SL archive · 2025 to 2026
Paper 2
Latest exam session: May 2026
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Where Paper 2 marks go, by unit
In syllabus order. The ring is the share of the marks each one carries.
Unit 1
Structure 1: Models of the particulate nature of matter
16% of marks · 44 questions
Unit 2
Structure 2: Models of bonding and structure
18% of marks · 52 questions
Unit 3
Structure 3: Classification of matter
12% of marks · 38 questions
Unit 4
Reactivity 1: What drives chemical reactions?
10% of marks · 21 questions
Unit 5
Reactivity 2: How much, how fast and how far?
23% of marks · 63 questions
- DueChemical equations and stoichiometry
Unit 6
Reactivity 3: What are the mechanisms of chemical change?
21% of marks · 60 questions
- DueElectrophilic addition to alkenes
Exam pattern
How often each micro-topic has been examined, year by year. Each label is explained under the grid.
Does it repeat?
Top 4 of 51 micro-topics for the next sitting. Numbers are questions per year.
fewermore
| Micro-topic | 2025 | 2026 |
|---|---|---|
| 8Intermolecular forces and physical properties, 2025: 8 questions | 4Intermolecular forces and physical properties, 2026: 4 questions | |
| 13Factors affecting rate and the Maxwell–Boltzmann distribution, 2025: 13 questions | 6Factors affecting rate and the Maxwell–Boltzmann distribution, 2026: 6 questions | |
| 11Functional groups and nomenclature, 2025: 11 questions | 4Functional groups and nomenclature, 2026: 4 questions | |
4.2.1Bond enthalpies | 6Bond enthalpies, 2025: 6 questions | 3Bond enthalpies, 2026: 3 questions |
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- DueElectrophilic addition to alkenes· last May 25 P2 TZ2
- Dueusually examined, but missing from the last two exam sessions
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Frequently asked questions
Short answers about this page.
Which Chemistry SL exam sessions are covered for Paper 2?
4 exam sessions from 2025 to 2026, the latest May 2026. Every Paper 2 in every timezone is read and classified in full, which gives 9 papers in this archive.
Which Paper 2 topic comes up most?
Intermolecular forces and physical properties (2.2.5): in 50% of papers, last seen May 26 P2 TZ3. Usually "Explain", worth about 2.6 marks in a paper that includes it.
Can I see the original question and mark scheme?
No. The wording belongs to the IB. You get the citation, the marks, the command term and the skill tested, plus our own matched practice questions with worked answers and AI marking.
What do "banker", "due" and "rising" mean?
Banker: examined in at least one sitting in four and still appearing. Due: regular before, but absent for the last two exam sessions. Rising: clearly more common in the last two years. Our classification of real papers, not an IB statistic.
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