山东省临沂市2017年中考化学真题试题(含答案)
山东省临沂市2017年中考化学真题试题1.下列过程属于化学变化的是A.海水晒盐B.酒精挥发C.钢铁生锈D.品红扩散2.下列几种常见的物质中,属于化合物的是A.火碱B.金刚石C.碘酒D.洁净的空气3.氧气能被压缩在钢瓶中贮存,说明A.氧分子的大小发生改变B.氧分子可以再分C.氧分子总是在不断运动D.氧分子之间有间隔4.实验室长期保存下列药品的方法中,不正确的是A.氢氧化钠密封保存在试剂瓶中B.硝酸银溶液密封保存在棕色试剂瓶中C.浓盐酸密封保存在试剂瓶中D.少量氨水保存在烧杯中5.在氧气中燃烧,发出耀眼的白光且有白烟产生的是A.木炭B.镁C.铁D.硫6.豆腐是人们喜爱的食物,营养丰富,能为人体提供...
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