下列各组物质不能使酸性高锰酸钾溶液褪色的是 A. 二氧化硫     

下列各组物质不能使酸性高锰酸钾溶液褪色的是

A. 二氧化硫       B. 乙炔       C. 苯         D. 乙烯

答案

C

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