2015年辽宁省朝阳市中考化学试题(空白卷)
2015年辽宁省朝阳市中考化学试卷一、选择题(本大题共12小题,1~8小题每题1分,9~12小题每题2分共16分.每道题只有一个选项符合题意)1.(1分)下列变化中属于化学变化的是( )A.瓷碗破裂B.酒精挥发C.纸张燃烧D.石油蒸馏2.(1分)下列实验操作规范的是( )A.蒸发B.液体加热C.加入固体药品D.熄灭酒精灯3.(1分)在一密闭容器中充满空气,经测定其中氮气的体积为100mL,则其中氧气的体积约为( )A.20mLB.35mLC.40mLD.25mL4.(1分)高温超导物质(Y2Ba4Cu6O13)是以YmOn、BaO和CuO为原料,经研磨烧结而成,此过程中所有元素的化合价均...
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