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单选题
实验室制取下列的干燥气体，可以使用相同的制气装置、收集方法和相同干燥剂的是（ ）．
A
CO2和Cl2
B
NH3和O2
C
CH4和O2
D
Cl2和H2
参考答案
参考解析
解析：
A项，二氧化碳采用排水法收集，氯气采用向上排空气法收集，二者制气装置不同；B项，氨气使用向下排空气法或者使用排饱和氯化钠溶液法收集，氧气采用排水法收集；C项，甲烷与氧气都可以采用排水法收集，而且他们的发生装置也相同；D项，氯气采用向上排空气法收集，氢气采用向下排空气法收集．
A项，二氧化碳采用排水法收集，氯气采用向上排空气法收集，二者制气装置不同；B项，氨气使用向下排空气法或者使用排饱和氯化钠溶液法收集，氧气采用排水法收集；C项，甲烷与氧气都可以采用排水法收集，而且他们的发生装置也相同；D项，氯气采用向上排空气法收集，氢气采用向下排空气法收集．
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