下列各组反应能产生可燃性气体的是     A.铜投入到浓硝酸中  

下列各组反应能产生可燃性气体的是

     A.铜投入到浓硝酸中                               B.碳投入到热的浓硫酸中

C.电石投入到水中                         D.碳酸钙投入到盐酸中

 

答案

C

解析:

 

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