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二氧化碳是初中化学学习和研究的典型物质,中考常考查其性质和实验室制取.下面我们结合典型例题剖析有关考点.考点一:二氧化碳的物理性质例1(2016·宁夏)物质的性质决定其用途,下列说法错误的是().A.干冰易升华,可用于人工降雨B.铜有良好的导电性,可制作导线C.玻璃刀上镶嵌石墨用于划玻璃D.氮气的化学性质不活泼,可用作保护气研析与解答:本题考查CO_2的物理性质及用途.常温下,CO_2是无色无味的气体,密度比空气大,能溶于水.固体CO_2叫干冰,干冰升华时,会吸收大量的热,可作制冷剂,用
Carbon dioxide is a typical substance for junior high school chemistry study and research. The examinations often examine its nature and laboratory preparation. Here we combine typical examples to analyze the relevant test sites. Test Point One: The physical properties of carbon dioxide Example 1 (2016 Ningxia) The nature of the material determines its Use, the following statement is wrong (). A. dry ice is easy to sublimate, can be used for artificial rainfall B. copper has good conductivity, can produce wire C. glass knife inlaid graphite is used to draw glass D. nitrogen chemical properties are not Lively, can be used as a protective gas analysis and solution: This question examines the physical properties and uses of CO_2. At room temperature, CO_2 is a colorless, odorless gas, with a higher density than air, soluble in water. Solid CO_2 is called dry ice, when dry ice sublimates. , will absorb a lot of heat, can be used as a refrigerant, with