What happens when SO2 is passed in acidified KMnO4 solution?
5SO2+2KMnO4+2H2O→K2SO4+2MnSO4+2H2SO45SO2+2KMnO4+2H2O→K2SO4+2MnSO4+2H2SO4 Sulphur dioxide is a strong reducing agent which reduces the purple coloured KMnO4KMnO4 solution into a colourless solution.
5SO2+2KMnO4+2H2O→K2SO4+2MnSO4+2H2SO45SO2+2KMnO4+2H2O→K2SO4+2MnSO4+2H2SO4 Sulphur dioxide is a strong reducing agent which reduces the purple coloured KMnO4KMnO4 solution into a colourless solution.