2014年德州市中考化学试卷及答案解析版
2014年山东省德州市中考化学试卷解析版一、选择题(共8小题,每小题2分,满分16分)1.下列现象中,没有发生化学变化的是()A.敞口放置的澄清石灰水中有白色固体析出B.敞口放置的氯化钠饱和溶液中有白色固体析出C.浓硫酸溅到木材上,木材变黑D.长期掩埋于地下的铁器上产生红褐色斑点解析:A.敞口放置的澄清石灰水中有白色固体析出,是因为与二氧化碳发生反应生成碳酸钙,有新物质生成,属于化学变化,故A不符合题意;B.敞口放置的氯化钠饱和溶液中有白色固体析出,是因为水份蒸发,溶剂减少,食盐结晶,没有新物质生成,属于物理变化,故B符合题意;C.浓硫酸溅到木材上,木材变黑,是因为浓硫酸具有脱水作用,吸收了木...
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