2009年山东省东营市化学中考试题及答案
2009年山东省东营市化学中考试题可能用到的相对原子质量:H:1C:12O:16Cl:35.5Ca:40一、选择题(本题包括20小题,每小题只有一个选项符合题意,请将答案序号填入下表内,并涂在答题卡上。)12345678910111213141516171819201.运用2008年诺贝尔化学奖的研究成果,可依据生物发光现象检测超微量钙的存在。这里的“钙”是指A.分子B.原子C.元素D.单质2.下列过程中主要只涉及物理变化的是A.浓硫酸使白纸变黑B.用灼烧法鉴别羊毛和合成纤维C.生石灰遇水变成熟石灰D.用酒精浸泡紫罗兰花自制酸碱指示剂3.饮料中的果味大多来自酯类。丁酸乙酯(C6H12O2)是无...
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