5086
Physics + Chemistry
Paper 5 has Physics + Chemistry questions. Most popular combination at top secondary schools.
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Plan your O-Level Combined Science Paper 5 practical prep: pick your 5086, 5087, or 5088 components, see the official Paper 5 practical facts, and note the SEC subject-level move from 2027.
Last updated: 2026-05-30
Use this first if you need O-Level science practical tuition routing: choose 5086, 5087, or 5088, then plan hands-on Paper 5 practice for both science components.
Each Combined Science syllabus pairs two science components. Pick yours to open the matching Paper 5 practical page.
Paper 5 has Physics + Chemistry questions. Most popular combination at top secondary schools.
Physics componentChemistry componentPaper 5 has Physics + Biology questions. The Physics question is identical to the one in 5086.
Physics componentBiology componentPaper 5 has Chemistry + Biology questions. Both questions are reused from 5086 and 5087.
Chemistry componentBiology componentThree facts every Combined Science candidate should know before revising.
📋Paper 5 has one or two compulsory questions on each of your two sciences. There are no optional questions.
🧪3-6 marks (10-20% of the paper) come from a modification or extension question. You plan it on paper - you do not have to execute it.
🔁Cambridge reuses questions across combinations: Physics in 5086 = Physics in 5087, Chemistry in 5086 = Chemistry in 5088, Biology in 5087 = Biology in 5088.
| Combined Science Paper 5 | Pure Science Paper 3 | |
|---|---|---|
| Duration | 1h 30 min | 1h 50 min |
| Marks | 30 | 40 |
| Weighting | 15% of final grade | 20% of final grade |
| Scope | Tests both your science components | Tests one subject only |
| Planning | Modification/extension element (10-20% of marks) | 15% of marks on a Planning question |
Source: SEAB 2026 syllabuses for 5086/5087/5088 and 6091/6092/6093.
These habits apply across Physics, Chemistry, and Biology components.
Read instruments to the correct decimal place - ruler to 0.1 cm, thermometer to 0.5 °C, burette to 0.05 cm³.
Column headings with units, consistent decimal places, and clear labels.
Appropriate scale, labelled axes, best-fit line or curve, and gradient with units.
Quote a number from your table in every conclusion sentence.
Name a specific change to procedure or apparatus, never just 'be more careful'.
Eye protection, hot apparatus handling, and spill clean-up routines.
Physics, Chemistry, or Biology task at full Paper 5 pace.
Switch sciences without losing tempo.
Markscheme language for both components, with specific mark-loss audits.
O-Level: SGD 150 per 2-hour session
Contact us to learn more about our tailored packages and available pricing options.
Share your level, subject, and whether you need Paper 3, Paper 4, or Paper 5 practice. We will point you to the right lab group or class timing.
Open only the detail you need: attendance records, lab evidence, or another science route.
SEAB states that private candidates for science subjects with laboratory-based components must either have sat the same subject before, or attend a course of instruction in science practical and complete it before the practical paper.
Eclat’s practical sessions provide supervised lab training plus centre-held attendance records. Where relevant, we may also issue an internal attendance or completion document, but the SEAB-facing requirement is the declaration supported by the centre’s records.
“Students compare answers and exam difficulty”
5086/01 Megathread
r/SGExams“Discussion on JC entry with Combined Science”
Combined Science and JC entry
r/SGExams“Peer advice on which track to pick”
Pure vs Combined
Anonymised practical-session photos show the bench layout, specimen observation, written work, and tutor guidance.
Short trimmed clips from recent practical sessions show the apparatus setup, bench layout, and working rhythm before joining a lab class.
SEAB says students will sit SEC subjects at G1, G2, or G3 levels from 2027, with a single certificate showing the subjects and levels taken. For 2026 Combined Science candidates, keep using the current 5086, 5087, and 5088 O-Level syllabus codes while watching SEAB's SEC syllabus pages for the 2027 subject-level mapping.
These 2026 pages keep O-Level and N-Level wording because families still search that way. They also include SEC wording so 2027 families can recognise the new system.
Official reference: SEAB Secondary Education Certificate (SEC).
Eclat guides: What SEC means from 2027 and O-Level and N-Level to SEC comparison.
5086 combines Physics and Chemistry, 5087 combines Physics and Biology, and 5088 combines Chemistry and Biology. Each has its own Paper 5 practical exam, and the Cambridge questions are reused across combinations that share a science.
Paper 5 is 1 hour 30 minutes, 30 marks, and 15% of your final Combined Science grade. It tests Assessment Objective C (Experimental Skills and Investigations), with 10-20% of marks reserved for a modification or extension question.
Yes. Most JCs accept a pass in Combined Science for H2 entry, but some competitive courses may prefer pure science. Check the specific JC's admission criteria.
Pure science (6091 Physics, 6092 Chemistry, 6093 Biology) is a standalone subject with its own 1 h 50 min Paper 3 practical worth 20% of the grade. Combined Science pairs two sciences into one subject with a shared 1 h 30 min Paper 5 practical worth 15%.
For practical, lab, and experiment courses, Eclat Institute keeps centre-held attendance records and may also issue an internal attendance or completion document based on participation and internal assessment.
Official references: MOE private-school certificate guidance · SEAB practical requirement for private candidates · SEAB registration declaration note.