江苏省宿迁市2017年中考化学真题试题(含答案)
江苏省宿迁市2017年中考化学真题试题一、选择题(共10个小题,1~5每题1分,6~10每题2分,计15分。每题只有一个选项符合题意)1.下列变化属于物理变化的是A.萄萄酿酒B.冰雪融化C.塑料老化D.烟花燃烧2.下列说法不正确的是A.空气中N2的体积分数约为78%B.O2的化学性质比较活泼,具有可燃性C.CO2是绿色植物光合作用的原料之一D.稀有气体化学性质稳定,可用作保护气3.下列实验操作不正确的是A.读液体体积B.过滤C.检查装置气密性D.称氯化钠质量4.白酒中溶质的主要成分是酒精(C2H5OH),下列说法正确的是A.酒精中碳、氢、氧元素的质量比为2:6:1B.酒精的相对分子质量为46g...
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