Home¶
Acknowledgments
- Thanks to Thai Le Thanh Luong (from Nguyen Quang Dieu High School for the Gifted, Dong Thap Province, Viet Nam) for sharing the Vietnam collection from 2007 to the present, making us the only non-Vietnamese website on the internet to host this collection. Please refer to the archive.
- Thanks to Gregor Kaljula (from Estonia) for sharing the actual documents of the latest 2026 Mendeleev Chemistry Olympiad. Please refer to the archive.
The Worldwide Chemistry Olympiad Archive is a curated, open-access repository of chemistry olympiad materials from around the world. It brings together past papers, solutions, competition records, and reference information from national olympiads, regional contests, and international chemistry competitions across more than 40 countries.
This archive is intended to support students, teachers, coaches, and researchers seeking reliable, well-structured resources for preparation, training, and competition analysis.
Designed for chemistry olympiad preparation
Explore materials by country, contest type, or competition level. The archive is organized to make it easier to compare selection systems, review historical papers, and trace the development of chemistry olympiads over time.
Archive Scope¶
 Past Papers |
 Countries |
 International Contests |
|---|---|---|
| 6,000+ | 40+ | 6 |
All entries are organized by country, contest, and year, with direct links to original documents and official sources whenever available.
Explore the Archive¶
National Olympiads¶
The national olympiad section provides structured profiles of chemistry competitions around the world, including organizing bodies, exam formats, national selection pathways, and historical results.
Featured national pages
-
Russia
50+ years of Olympiad tradition inherited from the Soviet era, featuring some of the most challenging national chemistry olympiad examinations in the world.
-
China
The top performer on the IChO stage. To date, this is the most comprehensive public resource dedicated to the Chinese ChO outside China.
-
Vietnam
A rapidly rising force in recent 5-10 years. With support from our community, we have assembled this comprehensive collection, which is exclusive to the non-Vietnamese Internet.
-
Japan
Perhaps the most enjoyable chemistry olympiad series, featuring creative problems and a competition format that has been carefully preserved for decades.
-
Germany
A strong chemistry nation with a well-established talent pipeline and a structured, multi-stage selection process. Our archive has become especially valuable because the official website is no longer maintained.
-
Poland
A traditional Eastern European powerhouse in chemistry olympiads, with more than 70 years of domestic competition history and a comprehensive multi-stage selection system. One of the three founding members of the IChO.
Browse the full collection in National Olympiads.
International Competitions¶
The international section covers major chemistry olympiads and regional contests, including competition structure, medal traditions, participation patterns, and archived examination papers.
| Competition | Major Region | Established | Notes |
|---|---|---|---|
| Mendeleev IMChO |
CIS / post-Soviet region | 1967 (USSR) | Long-running regional competition |
 ARBIChO |
Central Asia; Arab world; Asian Countries | 2010s | Regional olympiad with growing participation |
| OIAQ (Ibero-American) |
Ibero-America | 1990s | Multi-country chemistry contest |
 Baltic BChO |
Baltic states | 1993 | Regional olympiad with strong traditions |
 Nordic NChO |
Nordic countries | 2013 | Cooperative regional contest |
| IChO | 1968 | under construcion | |
| Arab ChO | 2010s | no information | |
| Gulf ChO | 2023 | no information |
These competitions provide important comparative reference points for students and coaches preparing for elite-level chemistry competition.
Junior Competitions¶
Junior-level competitions are included to support early-stage (grade 07-09, age 12-15) talent development and to document the progression from school-level chemistry participation to national and international olympiad preparation.
What Each Page Includes¶
Each country and competition page is organized with a consistent structure:
- Overview β competition history, governing body, and purpose
- Competition Format β selection pathway, stages, and qualification process
- IChO Performance β medal history and national achievements
- Past Exam Archive β searchable year-by-year materials and official documents
- Useful Links β official organizations, training institutions, and external references
Ongoing Development¶
This archive is actively maintained and expanded. Several country pages are still in progress, and additional materials are being incorporated as new information and documents become available.
If you have past papers, solutions, or contest information that is not yet represented here, your contributions would be greatly appreciated. In particular, resources from Vietnam, Singapore, Korea, Hungary, Iran, Taiwan (China) and Arab world are extremely welcome. Any national team selection papers, training camp materials, or related documents are also of tremendous value to the community.
Contact and Contribution¶
For questions, corrections, or collaboration opportunities, please contact:
c.pig8828@gmail.com
Suggestions, resource submissions, and updates are welcome from students, coaches, teachers, and organizers around the world.