All 11 syllabus topics — free to read. Each page has clear definitions, worked calculations, key equations, comparison tables and the exact exam traps that lose marks.
Start: Atomic Structure → Revision PackEach topic now has tap-to-reveal flashcards for key definitions and equations - test yourself before reading the notes.
Work through each section. Don't skip the red exam trap boxes — they reflect the most commonly lost marks.
After reading a section, close the page and write the key definition, formula and one worked example from memory.
When you can answer questions without notes, tick the topic in the revision checklist.
After each topic, attempt the Chemistry questions in the timed mini papers.
O-Level Chemistry syllabus — 6092
Sub-atomic particles, electronic configuration, periodic trends, isotopes and relative atomic mass.
Ionic, covalent and metallic bonding; giant and simple structures; linking structure to physical properties.
Writing formulae, balancing equations, state symbols and ionic equations.
The mole, Mr, moles from mass and volume, concentration, limiting reagent, percentage yield and purity.
pH scale, strong and weak acids, reactions of acids, methods of preparing soluble and insoluble salts.
Tests for gases, cations (NaOH and flame tests) and anions (AgNO₃ and BaCl₂ tests).
Collision theory, factors affecting rate (concentration, temperature, surface area, catalyst), measuring rate.
Dynamic equilibrium, Le Chatelier's Principle, industrial ammonia and sulfuric acid manufacture — worked examples and 5-question quiz.
Exothermic and endothermic, energy profile diagrams, bond energy calculations, calorimetry.
Reactivity series, reactions of metals, displacement reactions, extraction methods, rusting and prevention.
OIL RIG, oxidation states, electrolysis of molten and aqueous compounds, products at each electrode, electroplating.
Alkanes, alkenes, alcohols, carboxylic acids, esters, addition polymerisation and key reactions of each series.
GCE O-Level Chemistry is assessed by the Singapore Examinations and Assessment Board (SEAB) under syllabus code 6092. The examination consists of Paper 1 (multiple choice questions) and Paper 2 (structured questions and free-response answers). Together, the papers assess conceptual understanding, application to unfamiliar contexts, data analysis skills, and the ability to explain scientific phenomena using precise language.
All 11 topics on this page are covered in full — each with clear explanations, worked examples, Must-Know exam points, tap-to-flip flashcards, and 8 O-Level–style quiz questions. The notes are aligned to the SEAB 2026 syllabus.
Beyond the topic notes and flashcards, ScienceStar now has a complete O-Level Chemistry exam preparation suite covering Paper 1 MCQ, Paper 2 structured questions, practical skills, data-based questions, and more.