在相同的条件下焚烧下列物质,污染大气最严重的是(  )A.聚氯乙烯 

在相同的条件下焚烧下列物质,污染大气最严重的是(  )

A.聚氯乙烯                  B.聚乙烯               C.聚丙烯                     D.有机玻璃

答案

解析:聚苯乙烯、聚丙烯只含有碳、氢两种元素,有机玻璃(聚甲基丙烯酸甲酯)含有碳、氢、氧三种元素,它们完全燃烧只产生CO2和H2O,而聚氯乙烯却含有氯、碳、氢三种元素,完全燃烧时除产生CO2和H2O外,还有含氯的有毒物质。

答案:A

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