无机推断题根据形式可分为表格式、框图式、文字式、反应示意式等几种．推断题是高考的热点,也是学生学习的难点,因为它可以把基本概念、基本理论、元素及其化合物和化学计算揉合在一起,也可把社会生活、环境保护、科技热点等穿插于其中．无机推断题几乎能考查教学大纲的全部知识点．具有考查面广、综合性强、思维容量大等特点．还可考查学生对所学知识的理解程度、综合分析能力、思维方法和逻辑推理能力等．所以此类题成为高考试卷中的必备试题．推断题虽然难度大,但并非无迹可寻, 许多问题可从试题的结构和物质的颜色、反应的现象、反应条件、物质的特殊性质和一些反应的特殊数据进行切入,问题就会迎刃而解． Inferred inorganic problems can be divided into table format, block diagram type, text type, and reaction type according to the form. The inference question is a hot spot for the college entrance examination, and it is also a difficult point for students to learn because it can combine basic concepts, basic theories, elements and their compounds and chemical calculations, and can also intersperse social life, environmental protection, and technology hotspots. . Inferred questions can almost examine all the knowledge of the syllabus. Has a wide range of examination, comprehensive and strong thinking capacity. Can also examine students’ understanding of the knowledge they have learned, comprehensive analysis capabilities, thinking methods, and logical reasoning skills. So this type of question becomes an essential test item in the high exam volume. Although the inference problem is difficult, it is not without trace. Many problems can be solved by examining the structure of the questions and the colors of the materials, the reaction phenomena, the reaction conditions, the special properties of the materials, and the special data of some reactions.