2014年甘肃省兰州市中考化学试卷(含答案)
甘肃省兰州市2014年中考化学试卷 一、选择题(共25小题,1-12小题每题1分,13-25小题每题2分.共38分)1.(1分)(2014•兰州)下列变化中属于化学变化的是( ) A.胆矾碾碎B.纸张燃烧C.汽油挥发D.水变成水蒸气考点:化学变化和物理变化的判别.专题:物质的变化与性质.分析:本题考查学生对物理变化和化学变化的确定.判断一个变化是物理变化还是化学变化,要依据在变化过程中有没有生成其他物质,生成其他物质的是化学变化,没有生成其他物质的是物理变化.解答:解:A、胆矾碾碎只是形状发生了变化,没有新物质生成,属于物理变化,故A错;B、纸张燃烧生成二氧化碳和水,属于化学变化,故B正确;...
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