International Chemistry Olympiad - Wikipedia
https://en.wikipedia.org/wiki/International_Chemistry_Olympiad
WEBThe International Chemistry Olympiad (IChO) is an annual academic competition for high school students. It is one of the International Science Olympiads. The first IChO was held in Prague, Czechoslovakia, in 1968. The event has been held every year since then, with the exception of 1971.
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