IChO

International Chemistry Olympiad

The International Chemistry Olympiad (IChO) is an annual academic competition for high school students. It is one of the International Science Olympiads, testing advanced chemistry knowledge and laboratory skills.

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2025IChO 56 Prep Problems 2025

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2025IChO Practical Exam Official 2025

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2025IChO Prep Solutions Theory and Practical 2025

2025IChO Theory Exam Official 2025

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2023IChO Prep Problems Swiss compressed 2023

2022IChO China 2022

2022IChO Previous Prep Problems Nankai China 2022

2021IChO Prep Problems Kansai Area Japan Version 2.5 2021

2021IChO Problems 53rd Japan compressed 2021

2020IChO Prep Problems Istanbul Turkey 2020

2020IChO Problems Istanbul Turkey 2020

2019IChO Prep Problems Paris France 2019

2019IChO Theory and Practical 2019

2018IChO Prep Problems 2018

2018IChO Problems Theory and Practical Slovakia Czech 2018