[高二月考]下列化学变化需加入氧化剂才能发生的是：A.Fe3+ 变为 Fe2+B.SO42- 变为 SC.I- 变为 I2D.NO2 变为 HNO3和NO

C.A.Fe3+ -> Fe2+ (+3 -> 2+) (reduction)B.SO42- -> S (6+ -> 0) (reduction)D.NO2 -> HNO3 (4+ -> 5+) (oxidation)-> NO (4+ -> 2+) (reduction)*if an atom being oxidation and reduction in a same process,it ...