Physics
Math
Informatics
Chemistry
Biology
Astronomy
More
Science
Linguistics
Economics
Geography
Search problems and olympiads
List
Chemistry olympiads
Search chemistry problems, or words inside them
/
International
IChO
International Chemistry Olympiad
First held in 1968 in Czechoslovakia, between three countries: four theory tasks, no experiment and no medals.
2015 - 2026
Coming
IMChO
USNCO