Exam (elaborations)
IChO 2020-52 Chemistry Olympiad Questions and Marking Schemes
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International Chemistry Olympiad Problems with Solutions
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,Problems & SolutionsCHEMISTRY FOR A BETTER TOMORROW
July 25, 2020
,52nd International Chemistry Olympiad, Istanbul, TURKEY
Instructions
Only write with pen. Your calculator should be non-programmable.
This examination has 9 problems.
You will have 5 hours to solve the exam.
Begin only when the START command is given.
All results must be written in the appropriate boxes in pen in the designated areas on the
answer sheets. Use the back of the exam sheets if you need scratch paper. Remember
that answers written outside the answer boxes will not be graded.
Write relevant calculations in the appropriate boxes when necessary. Full marks will be
given for correct answers only when your work is shown.
The invigilator will announce a 30-minute warning before the Stop command.
You must stop working when the STOP command is given. Failure to stop writing will
lead to the nullification of your exam.
The official English version of this examination is available on request only for
clarification.
You are not allowed to leave your working place without permission. If you need any
assistance (broken calculator, need to visit a restroom, etc), raise hand and wait until an
invigilator arrives.
GOOD LUCK!
1
, 52nd International Chemistry Olympiad, Istanbul, TURKEY
Problems & Grading Information
Problem Title Total % of
Score Total
Score
1 Two Beauties of Turkey: the Van Cat and 24 8
the Ankara Cat
2 A Tale of a Reactive Intermediate 77 10
3 (±)-Coerulescine 51 8
4 Symmetry Does Matter! 66 10
5 Konya, Carrot, Beta-Carotene, Vitamin-A, 100 14
Immune System, Vision
6 Thermodynamics through an Interstellar 80 12
Journey
7 Phthalocyanines 85 12
8 Boron Compounds and Hydrogen Storage 58 14
9 Quantification of Heavy Metal Ions 100 12
TOTAL 641 100
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