International Chemistry Olympiad

An International Information Centre of the International Chemistry Olympiads is located in Bratislava, Slovakia. It collates all the information and documentation of the IChOs from the beginning of the Olympiad to the present. It has been set up and established in accordance with the conclusions of the International Jury in July 1994 (26th IChO in Oslo. Norway). 


Past papers of IChO’s

33rd IChO

India hosted the 33rd International Chemistry Olympiad (IChO) in its third year of participation in 2001 with  whole-hearted support of all countries. The Preparatory Problems and the question papers are available as a good resource material for learning of chemistry.

33rd ICHO Preparatory

Theory Task

Practical Task


National SelectionTasks of Different Countries

Indian National Chemistry Olympiad (2008-2016)

Indian National Chemistry Olympiad (2002-2007)

U.S. National Chemistry Olympiad

German National Olympiad

U.K. National Chemistry Olympiad