2011年长沙中考化学试题及答案
2011年长沙市初中毕业学业水平考试化学一、选择题(本大题包括15个小题,每小题3分,共45分。每小题只有1个选项符合题意。)1.日常生活中的下列变化,其中一种变化与其余三种变化类型不同的是()A.酒精挥发B.铁棒磨成针C.食品腐烂D.花香四溢2.为了确保食品安全,下列物质在生产、生活中的用途合理的是()A.用大量的亚硝酸钠腌制食品B.用碳酸氢钠焙制糕点C.用甲醛溶液浸泡海产品D.用“塑化剂”制饮料3.交警在查“酒驾”时,先请司机打开车窗,若闻到酒精气味;则要求司机必须接受酒精含量的测试。交警能闻到酒精气味是因为酒精()A.分子间有间隙B.分子很小C.分子在不断运动D.分子可分4.下列实验操作...
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