如果要干燥氨气,可选用的干燥剂是( ) ①浓硫酸 ②固体氢氧化钠

如果要干燥氨气,可选用的干燥剂是(  )

浓硫酸 固体氢氧化钠 氧化二磷   碱石灰 固体CaO  无水CaCl2

A.②③④⑤⑥    B.①③⑥     C.②④⑤    D.①②③④⑤

答案

答案 C

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