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非金属及其化合物是高中化学的基础,也是每年高考的热点.下面梳理、归纳本专题非金属及其化合物的重要考点,并辅以典型例题进行解题思路和方法的分析.1硅及其化合物的主要性质、应用例1下列说法正确的是().①粗硅(含Fe、Al、B、P等杂质)制备高纯硅的过程不涉及氧化还原反应;②水晶、玻璃、水泥、陶瓷的主要成分是硅酸盐;③常温下单质硅和单质碳的化学性质都不活泼,不能用石英砂与焦炭制备粗硅;④金刚石的熔点比单质硅高、硬度比单质硅大,CO2与SiO2的物理性质不相似;
Nonmetal and its compounds are the basis of high school chemistry, but also a hot spot for annual entrance examinations. The following combs and summarizes the key non-metallic and its compounds test sites, supplemented by typical examples of problem-solving ideas and methods of analysis.1 silicon and its The main properties of the compounds, the application of Example 1 The following statement is correct (). ① Raw silicon (containing Fe, Al, B, P and other impurities) Preparation of high purity silicon does not involve the redox reaction; ② crystal, glass, Ceramic is the main component of silicate; ③ at room temperature elemental silicon and elemental carbon chemistry are not active, can not be prepared with quartz sand and coke coarse silicon; ④ diamond melting point higher than elemental silicon, the hardness of silicon than the simple, CO2 Unlike the physical properties of SiO2;