美国化学奥赛(USNCO)考题及解答
Exam OrganizationMultiple choice USNCO (both local and national) exams cover the following topics:
Questions
Topic
1 – 6 Stoichiometry/Solutions
7 – 12 Descriptive/Laboratory
13 – 18 States of Matter
19 – 24 Thermodynamics
25 – 30 Kinetics
31 – 36 Equilibrium
37 – 42 Oxidation - Reduction
43 – 48 Atomic Structure/Periodicity
49 – 54 Bonding/Molecular Structure
55 – 60 Organic/Biochemistry
Local Chemistry Olympiad Exams
Nearly 16,000 U.S. students participate in Local Chemistry Olympiad competitions. Over 70% of Local Sections use the Local Section Exam prepared by the ACS Chemistry Olympiad Examination Task Force. Exams are administered annually in March and students are nominated for the U.S. National Chemistry Olympiad competition based on their performance and eligibility.
National Chemistry Olympiad Exams
The U.S. National Chemistry Olympiad National Exam is a 3-part, 4 hour and 45 minute exam administered in mid or late April by ACS Local Sections and International Chapters. Roughly 1,000 students participate in this exam each year. Students must be nominated by their coordinator to participate, and only a limited number of nominees are accepted per Local Section or International Chemical Sciences Chapter. Eligibility rules apply.
Part IPart IIPart III
[*]Multiple Choice
[*]90-minutes
[*]60 multiple choice questions
[*]Covers broad chemistry topics
[*]Problem Solving
[*]105 minutes
[*]8 written questions
[*]Covers chemical theories and models
[*]Lab Practical
[*]90 minutes
[*]2 laboratory practicals
[*]Involves problem solving in the laboratory
Past Local Chemistry Olympiad Exams
Local Exams (2000-2023)
[*]
2023Original Exam New Exam
2022Exam | Solutions
2021Exam | Solutions
[*]2021 local exam
[*]2020 local exam | solutions
[*]2019 local exam | solutions
[*]2018 local exam | solutions
[*]2017 local exam | solutions
[*]2016 local exam | solutions
[*]2015 local exam
[*]2014 local exam
[*]2013 local exam
[*]2012 local exam
[*]2011 local exam
[*]2010 local exam
[*]2009 local exam
[*]2008 local exam
[*]2007 local exam
[*]2006 local exam
[*]2005 local exam
[*]2004 local exam
[*]2003 local exam
[*]2002 local exam
[*]2001 local exam
[*]2000 local exam
Past National Chemistry Olympiad Exams
National Exams (1999-2023)
Answer key included
2023IIIIII
2022I | SolutionsIIIII
2021I | SolutionsIIIII (Omitted)
2021
[*]Part I
[*]Part II
[*]Part III omitted
2020
[*]Part I | solutions
[*]Part II
[*]Part III omitted
2019
[*]Part I | solutions
[*]Part II
[*]Part III
2018
[*]Part I | solutions
[*]Part II
[*]Part III
2017
[*]Part I | solutions
[*]Part II
[*]Part III
2016
[*]Part I | solutions
[*]Part II
[*]Part III
2015
[*]Part I
[*]Part II
[*]Part III
2014
[*]Part I
[*]Part II
[*]Part III
2013
[*]Part I
[*]Part II
[*]Part III
2012
[*]Part I
[*]Part II
[*]Part III
2011
[*]Part I
[*]Part II
[*]Part III
2010
[*]Part I
[*]Part II
[*]Part III
2009
[*]Part I
[*]Part II
[*]Part III
2008
[*]Part I
[*]Part II
[*]Part III
2007
[*]Part I
[*]Part II
[*]Part III
2006
[*]Part I
[*]Part II
[*]Part III
2005
[*]Part I
[*]Part II
[*]Part III
2004
[*]Part I
[*]Part II
[*]Part III
2003
[*]Part I
[*]Part II
[*]Part III
2002
[*]Part I
[*]Part II
[*]Part III
2001
[*]Part I
[*]Part II
[*]Part III
2000
[*]Part I
[*]Part II
[*]Part III
1999
[*]Part I
[*]Part II
[*]Part III
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