Previous Preparatory Problems


51th International Chemistry Olympiads

Paris, France

From 21 to 30 July 2019

Preparatory Problem IChO 2019

50th International Chemistry Olympiads

Bratislava, Slovakia and Prague, Czech Republic

49th International Chemistry Olympiads

Nakhon Pathom, Thailand

From 6 to 15 July 2017

Preparatory Problem IChO 2017

48th International Chemistry Olympiads

Tbilisi, Georgia

From 23 July to 1st August 2016

Preparatory Problem IChO 2016


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