在一定条件下,氯酸钾与碘按下式反应:2KClO3+I22KIO3+Cl2 下列相应结

在一定条件下,氯酸钾与碘按下式反应:2KClO3+I22KIO3+Cl2

下列相应结论中不正确的是(    )

A.该反应是置换反应                      B.还原性:I2>Cl2

C.非金属性:I>Cl                        D.氧化性:KClO3>I2

答案

解析:从反应形式看,题给反应属一种单质与一种化合物反应生成另一种单质与另一种化合物,当属置换反应;题给反应也是氧化还原反应,其氧化剂是KClO3,还原剂是I2,氧化产物是KIO3,还原产物是Cl2,依“同一氧化还原反应中氧化剂的氧化能力大于氧化产物的氧化能力、还原剂的还原能力大于还原产物的还原能力”的规律可知还原性I2>Cl2,氧化性KClO3>KIO3>Cl2>I2,由于Cl2的氧化性大于I2的氧化性,即Cl原子的得电子能力强于I原子的得电子能力,故非金属性Cl>I。

答案:C

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