下图是电解水的简易装置。 (1)C试管中收集到的气体是       

下图是电解水的简易装置。

1C试管中收集到的气体是        ,可以用         检验;D试管中收集到的气体是         CD中两种气体的体积比是       

2根据上述实验可以得出的结论是                        

3写出该反应的化学方程式                      

答案

1  带火星木条     12    2水由氢、氧两种元素组成

3

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