Redox Reaction 即 氧化還原反應
It's because the oxidation no. of chlorine changes from 0 to -1 in this reaction and chlorine oxidizes iodide ions to iodine so it is a redox reaction.
但 ,, 因為 Cl 本身係 Periodic Table 入面ge位置係高過 I ,, 所以呢個反應可以叫類似置換反應 ..
結論 :: 氧化還原反應 `