Problems
Previous preparatory problems
52th International Chemistry Olympiads
Istanbul, Turkey (Remote Access Exam)
From 23 to 29 July 2020
Preparatory Problems IChO 2020
51th International Chemistry Olympiads
Paris, France
From 21 to 30 July 2019
50th International Chemistry Olympiads
Bratislava, Slovakia and Prague, Czech Republic
From 19 to 29 July 2018
Theoretical Preparatory Problem IChO 2018
Practical Preparatory Problem IChO 2018
49th International Chemistry Olympiads
Nakhon Pathom, Thailand
From 6 to 15 July 2017
48th International Chemistry Olympiads
Tbilisi, Georgia
From 23 July to 1st August 2016
47th International Chemistry Olympiads
Baku, Azerbaijan
From 20 to 29 July 2015