iChO*

*international Chemistry Olympiad

http://en.wikipedia.org/wiki/International_Chemistry_Olympiad

http://www.icho2013.chem.msu.ru/

http://icho2014.hus.edu.vn/

http://www.pathwaystochemistry.com/2013/12/22/chemistry-olympiad-2014-registration-is-open/


http://bookza.org/book/1245787/29bd4d

http://bookza.org/book/1245784/42959f

 **

 
http://www.onlinetestseries.in/allenkota/hbcse-olympiads-exam/international-chemistry-olympiad-icho-stage1-mock-papers

http://scienceolympiadsbd.blogspot.in/2013/12/science-olympiads-2014.html 

best wishes,
sai bbhai.