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CO_2性质和制取在每年的中考化学中都会出现,从历年的试题中可以发现,CO_2性质和制取以选择题、填空题、实验题和探究题等多种题型中出现。因此,在复习过程中,我们要注意题型的归纳和总结。现将三种常见考查形式的考查内容及其答题技巧作如下解读。一、选择题考查二氧化碳的性质、用途及制取选择题一般会考查CO_2的水溶性、密度、不供给呼吸、不支持燃烧等性质;CO_2用于灭火、干冰的用途;CO_2的制取原理、检验和验满等知识点。
The nature and preparation of CO_2 will appear in the annual senior high school entrance examinations. From the examination questions of the past years, it can be found that the characteristics and preparation of CO_2 appear in many kinds of questions, such as multiple choice questions, blank fill questions, experimental questions and inquiry questions. Therefore, in the review process, we should pay attention to the induction and summary of the questions. Now three kinds of common test forms of test content and answer skills to interpret the following. First, multiple-choice questions examining the nature of carbon dioxide, use and preparation of multiple-choice questions generally check the water-soluble CO 2, density, does not supply breathing, does not support the nature of combustion; CO_2 for fire extinguishing, dry ice; CO 2 principle, Inspection and inspection and other knowledge points.