2018年浙江省衢州市中考化学试题(word版,含答案)
2.小柯给校园里植株矮小、叶色发黄的植物施用尿素CO(NH2)2,尿素是一种A.复合肥B.氮肥C.磷肥D.钾肥5.规范操作是科学实验成功的关键,下列操作正确的是A.倾倒溶液B.稀释浓硫酸C.测溶液pHD.检查气密性10.小柯做了一个趣味实验:他先将鸡蛋壳碾碎装入气球,再把气球套在盛有白醋的锥形瓶底口,然后把气球中的蛋壳加入锥形瓶中(装置的气密性良好),实验过程如图。下列对该实验的分析正确的是A.不能验证质量守恒定律,因为气球受到浮力B.冷却至宣温时,瓶内气体分子间空隙变大C.反应没有气体生成D.反应没有热量放出15.小柯为比较Mg、Fe、Cu三种金展的活动性顺序,进行了如图甲所示的实验,实验后...
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