近几年,全国及各省市高考化学试题对非金属元素(如C、N、O、Si、S、Cl等)及其化合物的考查方式主要有三种:一是以选择题的形式考查常见非金属元素及其化合物的性质与用途;二是结合化学实验,考查非金属元素及其化合物的性质、物质的分离与提纯、化学实验方案的设计与评价、化学定量实验分析等,侧重考查学生的化学实验基本操作能力与基本技能;三是与化学反应原理相结合,考查化学反应与能 In recent years, there are mainly three ways to examine non-metallic elements (such as C, N, O, Si, S, Cl, etc.) and their compounds in chemistry examinations of entrance examinations of colleges and universities across the country and provinces. Metal elements and their properties and uses of compounds; the second is to combine chemical experiments to examine the nature of non-metallic elements and their compounds, the separation and purification of substances, the design and evaluation of chemical experiments, chemical quantitative experimental analysis, focusing on examining students Chemical experiment basic operation ability and basic skills; Third, combined with the principle of chemical reaction, test chemical reaction and energy