Which of the following is a redox reaction?
- KCI(aq) + H2SO4(aq) → KHSO4(aq) + HCI(aq)
-
2FeBr2(aq) + Br4(aq) → 2FeBr3(aq)
- 3AgNO(aq) + FeCl3(aq) → 3AgCl(aq) + Fe(NO3)3(aq)
- H2CO3(aq) → H2O(I)2- + CO2(g)