What does the 2026 O-Level Chemistry Paper 3 practical involve?

Paper 3 lasts 1 h 50 min, carries 40 marks, and contributes 20% of the overall Chemistry grade. Section A and Section B tasks probe Planning, MMO, PDO, and ACE skills.

Will qualitative analysis notes be provided in the paper?

Yes. The question booklet includes the qualitative analysis notes, but you must pick appropriate reagents and inference steps efficiently.

How much of Paper 3 is Planning?

Planning carries about 15% of the marks. You will justify method choices, safety controls, and data treatment before performing the experiment.

How can I practise if I cannot use school apparatus often?

Run micro-scale titrations, rehearse observation phrasing from past scripts, and use our data sets to practise uncertainty and ACE write-ups between lab sessions.

O-Level Chemistry Experiments

Upper secondary lab technique refreshers and Paper 3 evaluation frameworks for chemistry.

Prep resources

According to the 2026 Singapore-Cambridge O-Level Chemistry syllabus (6092)—the specification Sec 3 students in 2025 will face in their 2026 examination—Paper 3 is a 1 h 50 min practical comprising 40 marks (20 % of the examination) split across timed Section A and Section B investigations.

Students must evidence technique, data handling, and evaluation directly on the script.

The same four skill bands:

Planning (P)
Manipulation, Measurement and Observation (MMO)
Presentation of Data and Observations (PDO)
Analysis, Conclusions and Evaluation (ACE)

Tasks range from acid-base and redox titrations to rate experiments, separation and purification workflows, salt preparation, gas handling, and qualitative analysis of cations, anions, and gases.

Exam format at a glance

Paper	Duration	Marks / weighting	What to expect
Paper 3 Practical	1 h 50 min	40 marks (20% of O-Level grade)	Sequential investigations covering Planning, MMO, PDO, ACE, including titrations, rates, and qualitative analysis.

Key lab expectations

Write Planning responses that compare titration options, set out safety considerations, and outline how you will process raw volumes.
Drill MMO routines for burette reading, gas collection, and heating so you stay within timing windows while keeping measurements precise.
Present PDO work with balanced equations, molar calculations, and qualitative observations written in concise, objective language.
Deliver ACE conclusions that quantify percentage uncertainty, spot systematic errors, and suggest practical refinements linked to chemistry principles.

Each resource here breaks those expectations into pre-lab checklists, observation templates, and evaluation prompts so you can rehearse Paper 3 timings, document observations cleanly, and spot gaps before working with our tutors.

Frequently Asked Questions

What does the 2026 O-Level Chemistry Paper 3 practical involve?
Paper 3 lasts 1 h 50 min, carries 40 marks, and contributes 20% of the overall Chemistry grade. Section A and Section B tasks probe Planning, MMO, PDO, and ACE skills.
Will qualitative analysis notes be provided in the paper?
Yes. The question booklet includes the qualitative analysis notes, but you must pick appropriate reagents and inference steps efficiently.
How much of Paper 3 is Planning?
Planning carries about 15% of the marks. You will justify method choices, safety controls, and data treatment before performing the experiment.