2012年湖南省益阳市中考化学试卷(含解析版)
2012年湖南省益阳市中考化学试卷一、选择题(每小题只有一个选项符合题意,每小题3分,共45分)1.(3分)日常生活中下列现象,其中一种与其他三种有本质不同的是( )A.铁锅生锈B.苹果腐烂C.石蜡熔化D.天然气燃烧2.(3分)下列物质中,属于纯净物的是( )A.石油B.二氧化碳C.生理盐水D.空气3.(3分)下列有关燃烧现象的描述正确的是( )A.硫粉在氧气中燃烧,产生大量白烟B.红磷在空气中燃烧,产生蓝紫色火焰C.铁丝在氧气中燃烧,火星四射,生成黑色固体D.镁带在空气中燃烧,生成氧化镁4.(3分)以下基本实验操作正确的是( )A.点燃酒精灯B.称量氢氧化钠固体C.稀释浓硫酸D.滴加...
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