要除去氮气中混有的少量H2、CO、CO2，得到干燥的氮气(氮气不与下列试剂反应，假设每步反应都是完全的)，通过下列试剂的先后顺序中，正确的是（）①浓硫酸②苛性钠溶液③灼热的氧化铜_刷题宝

题干

要除去氮气中混有的少量H₂、CO、CO₂，得到干燥的氮气(氮气不与下列试剂反应，假设每步反应都是完全的)，通过下列试剂的先后顺序中，正确的是（）
①浓硫酸 ②苛性钠溶液 ③灼热的氧化铜

A：①②③

B：②①③

C：③②①

D：②③①

上一题下一题 0.0难度选择题更新时间:2019-05-14 11:53:36

答案(点此获取答案解析）

C

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阅读理解

Remember Tony and Peter．the twin brothers who started singing at the age of five?The little boys are now twenty—five years old and will come back home for the first time since they left ten years ago．They will sing to celebrate the 100th birthday of our beautiful town．

Tony and Peter are famous for their wonderful voices．They are popular with both young and old people．Three years ago,the brothers organized the Garbage Can with their three cousins．The five of them started to write their own songs and have become successful．In the coming concert in Greentown,the Garbage Can is going to sing their bestloved songs and several new ones．

The concert will be at Apple Park at 7 pm on 10th october．Fans who do not want to miss it should get to the park as early as possible．

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