某难溶于水的无毒气体，密度约是空气密度的 59 ，收集该气体可用方法有 ①向上排空气法 ②向下排空气法 ③排水法．_刷题宝

题干

某难溶于水的无毒气体，密度约是空气密度的

5

9

，收集该气体可用方法有（）

①向上排空气法 ②向下排空气法 ③排水法．

A：①③

B：③

C：②③

D：①②③均可

上一题下一题 0.0难度选择题更新时间:2018-01-17 03:14:34

答案(点此获取答案解析）

C

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