2013年青海省中考化学试卷(省卷)(含解析版)
2013年青海省中考化学试卷一、选择题(每小题只有一个选项符合题意,1-8题每小题1分,9-13题每小题1分,共18分)1.(1分)下列变化中,属于物理变化的是( )A.天然气燃烧B.石蜡融化C.酸雨形成D.尸体腐烂2.(1分)我国曾发生过多次将工业用盐如亚硝酸钠(NaNO2)误作食盐用于烹饪而引起的中毒事件,请你推断亚硝酸钠(NaNO2)中氮元素的化合价是( )A.+2B.+3C.﹣3D.03.(1分)下列物质在空气或氧气中燃烧时,对实验现象描述正确的是( )A.硫在氧气中燃烧,产生淡蓝色火焰B.镁在空气中剧烈燃烧,冒出大量的白烟C.木炭在氧气中燃烧,发出白光D.细铁丝在氧气中燃烧,生成...
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