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.

本数据集收录了2020年面向全国高中生举办的古巴全国化学奥林匹克竞赛的赛题、解答与赛事结果。古巴全国化学竞赛（Cuban National Chemistry Contest，缩写CNQ，西班牙语官方名称为Concurso Nacional de Química）为年度赛事，旨在激发高中生在高中阶段深耕化学科学领域的学习。该赛事由古巴教育部（西班牙语官方缩写为MINED）与哈瓦那大学联合主办，面向十年级、十一年级及十二年级学生（平均年龄15至17岁）开放报名。赛事举办前，各高中将率先开展市级竞赛，古巴各省亦会组织省级竞赛，省级竞赛的优胜者将获邀参与全国赛。本届古巴化学奥赛的赛事场地设于古巴各省的精准科学职业高中（西班牙语官方缩写为IPVCE），每年于2月或3月举办，为期两天。比赛期间，选手需完成两套由往届参赛者与赛事指导教师命制的理论题或理论与实操结合题型。赛事阅卷工作由来自全国的遴选教师组成的评审团在哈瓦那统一开展，成绩优异者将被授予金、银、铜奖牌。顶尖优胜者可任选理科专业与心仪高校继续深造，无需额外满足入学要求；此外，这些选手将纳入国家预选名单，并获邀前往哈瓦那参与短期集训。经过最终选拔环节后，将组建参与国际化学奥林匹克竞赛的国家队。本数据集同时收录了备赛习题手册、全国赛赛题及其解答，以及古巴学生在全国赛与国际赛事中的赛事结果，所有内容均提供官方西班牙语版本与英文译版。