2011年山东省临沂市中考化学试题及答案
2011年临沂市初中学生学业考试理科综合试题化学试题可能用到的相对原子质量:H-1C-12O-16Na-23Cl-35.5Ca-40一、选择题(每题只有一个选项符合题意。每题2分,共18分)1.在下列变化中,有一个变化与其他变化的本质不同,该变化是()A.石蜡融化B.纸张燃烧C.酒精挥发D.冰雪融化2.在下列物质中,属于纯净物的是()A.海水B.苛性钠C.稀盐酸D.空气3.将下列物质分别放入水中,能形成溶液的是()A.花生油B.泥土C.汽油D.蔗糖4.2011年,我国进一步加大了对酒后驾车的查处力度,取得明显效果。交警使用的一种酒精检测仪中装有重铬酸钾(K2Cr2O7),重铬酸钾(K2Cr2O...
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