山东省济宁市2019年中考化学真题试题(含解析)
2019年山东省济宁市中考化学试卷1.下列变化过程,一定发生化学变化的是( )A.冰雪融化B.海水晒盐C.钢铁锈蚀D.沙里淘金2.下列物质的性质与用途,不相匹配的是( )A.氧气可以支持燃烧 工业上可用作燃料B.氮气的化学性质定稳 工业上可用作焊接保护气C.白醋含有醋酸,显酸性 家庭中可用作水垢D.硫酸钡既不溶于水,也不与酸反应 医疗上可用于“钡餐”造影3.关于分子、原子、离子的下列说法中,错误的是( )A.分子、原子、离子都是在不断运动的粒子B.分子是由原子构成的一种粒子C.分子、原子...
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