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推断题是指根据已知的实验步骤和实验现象,联系有关化学原理、元素化合物性质、化学计算等知识进行综合分析、推理,求得结论的一类题型。解这类题的方法很多,现介绍几种,供同学们参考。1 层层筛选顺推法 根据已知条件逐层分析,逐一剔除不存在的因素,肯定存在的条件,注意根据所涉及的关联条件进行准确推断。
The inference question refers to a type of questions that is based on known experimental procedures and experimental phenomena, and involves comprehensive analysis and inference about the knowledge of chemical principles, the properties of elemental compounds, and chemical calculations to obtain conclusions. There are many ways to solve this type of problem. Several types are introduced for students’ reference. 1 Layer-by-layer screening and postponement method According to the known conditions, the analysis is performed layer by layer, the non-existent factors are eliminated one by one, and the existence conditions are confirmed. Attention is paid to accurate inference based on the related conditions involved.