山东省临沂市2020年初中毕业学业统一考试化学试卷（解析版）
【内容简介】一、选择题（本题包括18小题，每小题2分，共36分。每小题只有一个正确答案）1.下列变化中,属于化学变化的是（）A. 冰雪融化B. 蜡烛燃烧C. 干冰升华D. 海水晒盐【答案】B【解析】【分析】化学变化是指有新物质生成的变化，物理变化是指没有新物质生成的变化，。【详解】A、冰雪融化只是状态发生改变，没有新物质生成，属于物理变化，故A不正确；B、蜡烛燃烧过程中有新物质二氧化碳等生成，属于化学变化，故B正确；C、干冰升华过程中只是状态发生改变，没有新物质生成，属于物理变化，故C不正确；D、海水晒盐过程中没有新物质生成，属于物理变化，故D不正确。故选B。【点睛】化学变化和物理变化的本质区别是否有新物质生成。2.溶液在我们生活中有着广泛的用途。下列物质不属于溶液的是A. 白酒B. 蒸馏水C. 医用酒精D. 生理盐水【答案】B【解析】 分析】溶液是在一定条件下溶质分散到溶剂中形成的均一、稳定的混合物。【详解】A、白酒是均一稳定的混合物，属于溶液，故A正确；B、蒸馏水是纯净物，不属于溶液，故B不正确；C、医用酒精是均一稳定的混合物，属于溶液，故C正确；D、生理盐水是均一稳定的混合物，属于溶液，故D正确。故选B。3.正确规范的操作是实验成功和人身安全的重要保证。下列实验操作正确的是......
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