Q: What is the SJChO (Singapore Junior Chemistry Olympiad)? A: The Singapore Junior Chemistry Olympiad (SJChO) is a Singapore chemistry competition for full-time Secondary 3, 4, and 5 students. SNIC states that the competition is open to students in Singapore, that schools register candidates through SNIC, and that the 2026 competition has Round 1 on 20 May 2026 and Round 2 on 1 July 2026.
TL;DR SJChO is a two-round chemistry competition: Round 1 is a 2-hour MCQ theory paper taken online by all registered candidates, while Round 2 is for selected candidates and uses experiment videos with open-ended and/or MCQ questions. SNIC says questions are generally based on the GCE O-Level syllabus, but the scientific committee focuses on analytical, reasoning, and creative skills rather than O-Level exam style. Main search routes: use this page for 2026 dates and format, SNIC for registration and official sample questions, and your school's chemistry teacher-in-charge for nomination details. Registration deadline for 2026 is 31 March 2026. SNIC lists the 2026 fee as S$20 per student for schools in Singapore.
Registration quick answer (Singapore): Schools register candidates through SNIC. The fee is S$20 per student. The registration deadline for 2026 is 31 March 2026. Confirm the current process with your school's chemistry teacher-in-charge or visit snic.org.sg/index.php/event/sjcho.
The Singapore Junior Chemistry Olympiad (SJChO) is a chemistry competition for secondary school students in Singapore. SNIC describes it as open to all full-time Secondary 3, 4, and 5 students in Singapore.
Use SJChO as a junior chemistry challenge first, not as a guaranteed national-team pathway. It gives students early exposure to chemistry questions that ask for reasoning beyond routine school exercises. Students who later move into JC chemistry may also consider the senior Singapore Chemistry Olympiad (SChO) and the International Chemistry Olympiad (IChO) pathway.
2 Eligibility and registration
Aspect
Detail
Eligibility
All full-time Secondary 3, 4, and 5 students in Singapore. SNIC states the eligible school levels on the checked 2026 page; confirm any edge case with the organiser or your teacher-in-charge.
School types
SNIC states that the competition is for students in schools in Singapore.
Registration
Schools register candidates through SNIC.
Fee
S$20 per student. Payment by e-invoice, bank transfer, or cheque.
Minimum team size
SNIC says schools should register at least 10 participants to guarantee 1 Round 2 participant.
Registration deadline (2026)
31 March 2026
Individual registration is generally not available --- students must be nominated by their school. Speak to your school's chemistry teacher-in-charge for the nomination process.
3 Competition format
SJChO has two rounds. Both are invigilated by school teachers.
3.1 Round 1 --- MCQ theory paper (all candidates)
Date (2026): 20 May 2026
Duration: 2 hours
Format: Multiple-choice questions (MCQ)
Platform: Online via ClassMarker, taken at the candidate's own school
Scoring: Marks awarded for correct answers only; no penalty for incorrect or blank answers
3.2 Round 2 --- experimental video paper (selected candidates)
Date (2026): 1 July 2026
Eligibility: Top performers from Round 1 are selected. For every 10 participating students from a school, at least 1 student is selected based on Round 1 scores. Typically the top 20% advance.
Format: Students watch a series of experiment videos and answer open-ended and/or MCQ questions independently. Past sample tasks have involved topics such as enzyme chemistry, UV spectroscopy, thin-layer chromatography, and molecular polarity.
Awards
Round 2 participants receive Gold, Silver, Bronze, or Merit e-certificates. Top-performing schools are also recognised across three bands. The Awards Ceremony date for 2026 is to be announced.
Dates and arrangements may change depending on the MOE calendar --- always confirm with the latest SNIC circular.
4 Syllabus and topics
According to SNIC, SJChO questions are based on the GCE Ordinary Level chemistry syllabus. However, the scientific committee produces questions that emphasise analytical, reasoning, and creative skills rather than straightforward recall. The question style differs from the O-Level exam.
Core areas typically covered include:
Atomic structure and bonding: electron configurations, ionic/covalent/metallic bonding, intermolecular forces
Stoichiometry: mole calculations, chemical equations, limiting reagents
Acids, bases, and salts: pH, neutralisation, salt preparation
Redox chemistry: oxidation states, electrochemical cells, reactivity series
SJChO (Sec 3--5) -> SChO (JC1 / equivalent) -> IChO training team -> IChO
Here is how the pipeline works at the senior level:
SChO (Singapore Chemistry Olympiad): Jointly organised by SNIC, the NUS Chemistry Department, and MOE. Open to JC1 (or equivalent) students. Approximately 150 students sit the SChO each year.
Training selection: Based on SChO performance, about 25 students are selected for the IChO training programme. Training is co-led by JC teachers and NUS/NIE lecturers, with sessions on Wednesday afternoons from February to May, plus intensive training during the March and June holidays.
Final team: The top 4 students are selected on merit and undergo further intensive training (including residential training at NUS) before representing Singapore at the IChO.
SJChO does not directly select the IChO team, but strong SJChO performers gain early exposure to olympiad-style thinking, which gives them a head start when they move on to SChO in JC.
SJChO is explicitly based on the GCE O-Level chemistry syllabus. Master the core topics --- stoichiometry, bonding, acids and bases, redox, organic chemistry --- before attempting extension material.
Use the official sample material
SNIC publishes official Round 1 sample questions and a Round 2 sample task with model answers on their website. These are the safest preparation resource because they show the actual difficulty level and question style.
Treat "SJChO past year papers" searches carefully. The official route is SNIC's sample-material page, which links the past year questions PDF and the Round 2 sample task. Do those first before collecting unofficial question sets, because unofficial compilations may drift from the current committee style.
Develop analytical reasoning
The SJChO committee emphasises that questions focus on analytical, reasoning, and creative skills. Practise interpreting unfamiliar data, working through multi-step problems, and reasoning about experiments you have not seen before.
Read ahead selectively
Exposure to introductory A-Level topics (energetics, equilibrium, organic mechanisms) can help with harder questions, but the core syllabus remains O-Level.
Prepare for the experimental round
Round 2 involves watching experiment videos and answering questions about what you observe. Practise reading and interpreting experimental data --- chromatography results, spectroscopy graphs, enzyme kinetics --- even if you have not performed those experiments yourself.
Textbooks and resources
The SEAB GCE O-Level chemistry syllabus document (freely available)
Your school's O-Level or IP chemistry textbook for the core content
SNIC sample questions from the official website
For extension: introductory chapters of A-Level chemistry textbooks on energetics, equilibrium, and organic mechanisms
SNIC does not publish a separate syllabus document beyond specifying the O-Level syllabus --- if you want to know exactly what is testable, the SEAB syllabus is the reference.
Olympiad chemistry --- even at the junior level --- rewards students who have fully internalised the core curriculum before reaching for extensions. Students who are still building confidence in fundamental chemistry concepts benefit from structured support.
Eclat does not offer olympiad-specific tuition, but our tuition programmes focus on building deep conceptual understanding:
Strong foundations in the school curriculum are the essential first step before tackling olympiad-level material.
Frequently Asked Questions about SJChO
What is the Singapore Junior Chemistry Olympiad (SJChO)?
The SJChO is a chemistry competition for full-time Secondary 3, 4, and 5 students in Singapore. Schools register candidates through SNIC.
Who organises SJChO?
The Singapore National Institute of Chemistry (SNIC) publishes the SJChO competition details, registration instructions, syllabus notes, and sample questions.
Who is eligible for SJChO?
All full-time Secondary 3, 4, and 5 students in Singapore, according to SNIC's 2026 competition details page.
How do I register for SJChO?
Schools register candidates through SNIC. The fee is S$20 per student. Individual sign-up is generally not available --- speak to your school's chemistry teacher-in-charge. The 2026 registration deadline is 31 March 2026.
What is the SJChO exam format?
SJChO has two rounds:
Round 1: 2-hour MCQ theory paper, taken online via ClassMarker at the candidate's own school. All registered candidates participate.
Round 2: Selected candidates answer questions based on experiment videos. SNIC describes the questions as open-ended and/or MCQ.
What topics does SJChO cover?
SJChO is based on the GCE O-Level chemistry syllabus, but questions emphasise analytical, reasoning, and creative skills. Topics include atomic structure, bonding, stoichiometry, acids and bases, redox, organic chemistry, energetics, and rates of reaction. Round 2 adds experimental reasoning.
Are there past papers available?
Yes. SNIC publishes official Round 1 sample questions and a Round 2 sample task with model answers on their website at snic.org.sg.
What are the SJChO award bands?
Round 2 participants receive Gold, Silver, Bronze, or Merit e-certificates. Top-performing schools are recognised across three bands. Cut-offs are set by the organisers each cycle.
How does SJChO connect to SChO and IChO?
The broad pathway is SJChO (secondary school) then SChO (JC or equivalent) then IChO training selection then IChO. SJChO is useful early exposure, but it does not directly select the IChO team.
When is SJChO 2026?
Registration deadline: 31 March 2026
Round 1: 20 May 2026
Round 2: 1 July 2026
Awards Ceremony: TBA
Dates may change depending on the MOE calendar --- confirm with the latest SNIC circular.
Is SJChO useful for DSA or scholarship applications?
A strong SJChO result (especially a Gold or Silver award from Round 2) can support DSA, scholarship, or special programme applications, particularly for students aiming at JC science programmes. Confirm with your target institution's admissions criteria.
Does Eclat offer SJChO preparation?
Eclat does not offer olympiad-specific tuition. However, our IP Chemistry tuition and O-Level Chemistry tuition build the strong foundations that are essential for any advanced chemistry work, including olympiad preparation.
After SJChO: building the chemistry underneath the olympiad
SJChO rewards a firm grasp of core chemistry applied to unfamiliar problems. Most
candidates sit it in lower to mid secondary, so the strongest next step is
deepening the school chemistry the competition draws on.
