Cuban National Chemistry Contest 2020

This contribution compiles the problems, solutions and results of the Cuban chemistry olympiad for high school students celebrated nationwide in 2020. The Cuban National Chemistry Contest (CNQ, Concurso Nacional de Química, official name in Spanish) is a yearly competition intended to stimulate high school students the study chemical sciences during their bachelor's. It is sponsored by the Cuban Ministry of Education (MINED, official acronym in Spanish) and the University of Havana. Tenth-, eleventh- and twelfth-graders (15-17 years old, on average) are welcome to participate. This event is preceded by the Municipal Contest at each high school and the Provincial Contest in every province of Cuba. Winners of the latter are invited to participate in the national event. This Cuban chemistry olympiad takes place at the Vocational High School for Exact Sciences (IPVCE, official acronym in Spanish) in every province. It is organized as a two-day event in February or March every year. During the competition, the students try to solve two sets of theoretical or theoretical-practical problems elaborated by previous contestants and mentors. The qualification of the exams is performed in Havana by a tribunal integrated by selected teachers from all over the country. The highest scores are priced with gold, silver and bronze medals. Top winners can choose any career in science and the university they like the most to continue their studies with no need for additional requisites. In addition, they are part of the national pre-selection and are invited to Havana for a short training period. After a final selection round, the national team for the international chemistry olympiads is formed. Herein, the problem sets of the Preparatory Problems booklet, the national exams and their solutions, and the results of the Cuban students in the national and international competitions are provided in the official Spanish version and English translation.本数据集汇编了2020年全国性高中生赛事——古巴化学奥林匹克竞赛（Cuban Chemistry Olympiad）的赛题、解法与最终成绩。古巴全国化学竞赛（CNQ，西班牙语官方名称为Concurso Nacional de Química）是一项年度赛事，旨在激励高中阶段学生研习化学科学，由古巴教育部（MINED，西班牙语官方缩写）与哈瓦那大学联合主办。十年级、十一年级与十二年级学生（平均年龄15至17岁）均可报名参赛。该赛事需先通过各高中举办的市级竞赛，以及古巴各省举办的省级竞赛的选拔，省级竞赛的优胜者将获邀参加全国赛事。古巴化学奥林匹克竞赛的举办地点为各省的精准科学职业高中（IPVCE，西班牙语官方缩写），赛事于每年2月或3月分两日举行。竞赛期间，选手需完成两套由往届参赛者与指导教师命制的理论题或理论实践结合题。试卷的评审评分工作由来自全国的遴选教师组成的评审团在哈瓦那开展。成绩优异者将分别授予金、银、铜牌。顶尖获奖选手可任选心仪的科学类专业与大学继续深造，无需额外考核要求。此外，他们将入选国家预选阵容，并获邀前往哈瓦那参加短期培训。经过最终选拔环节后，代表古巴参加国际化学奥林匹克竞赛的国家队就此组建。本数据集包含官方西班牙语版本与英文译版的备赛习题集、全国竞赛试题及其解法，以及古巴学生在全国与国际赛事中的参赛成绩。