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下列说法正确的是①氨可以用浓硫酸干燥也可用无水CaCl2干燥;②SiC俗称金刚砂
下列说法正确的是①氨可以用浓硫酸干燥也可用无水CaCl2干燥;②SiC俗称金刚砂
发布时间:2020-07-26 01:40:11
下列说法正确的是①氨可以用浓硫酸干燥也可用无水CaCl2干燥;②SiC俗称金刚砂,可用作砂纸、砂轮的磨料;③漂白粉和漂白精的有效成分都是Ca(ClO)2;④NO在人体的血管系统内具有传送信号的功能,也是大气污染物之一;⑤氧化铜可作为制造玻璃、搪瓷的红色颜料.A.①③⑤B.②③④C.①②⑤D.②③⑤
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B
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