有A、B、C、D四种物质,A是无色无味的气体;B在A中燃烧发出明亮的

ABCD四种物质,A是无色无味的气体;BA中燃烧发出明亮的蓝紫色火焰,同时生成一种无色有刺激性气味的气体CD是一种无色气体,把D通入澄清的石灰水中,石灰水变浑浊。请判断:(12分)

(1)ABCD各是什么物质?请将答案填在空格内。

  A       B       C       D      

(2)写出BA中燃烧反应的文字表达式                                     

答案

(1)氧气      二氧化硫   二氧化碳

(2)+氧气二氧化硫

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