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近年来,在高考化学试题中框图题屡有出现,它以鲜明直观的框图形式、简炼的文字叙述、密集的知识考查点汇集于试题中。研究和开发这种命题形式,有助于提高试卷的卷面质量,有利于综合考查基础知识,便于培养学生思维的广阔性和深刻性,使知识纵横联系、深化提高训练效果。下面就该类题目进行示例分析。 一、推断类框图题 [特点]:该类题多以元素的单质及其化合物知识为背景,将典型元素的单质及其化合物的制备、性质、反应现象和转化关系等融为一体,综合化、结构化、网络化,以框图和箭头指向而设计的一种要求推断框架内物质的成分或写出转化反应方程式的题型。
In recent years, in the chemical examination questions of the college entrance examination, the questions of the block diagram have appeared frequently. It has gathered in the questions in the form of vivid and intuitive block diagrams, concise text narratives, and intensive knowledge examination points. Researching and developing this kind of propositions will help improve the quality of papers in the papers, help to comprehensively examine the basic knowledge, and facilitate the development of broad and profound thinking of students, so as to link knowledge and deepen and improve training results. The following example analysis of this type of problem. First, inference class diagram questions [characteristics]: This class of questions are mostly based on the elemental elemental and compound knowledge background, integrates the preparation, properties, reaction phenomena and conversion relationship of the elemental elements and compounds of typical elements into one. , Structured, Networked, Designed with a block diagram and an arrow pointing to a requirement to infer the composition of a substance within a frame or to write a formula for the transformation reaction equation.