JAMB - Chemistry (1982 - No. 18)
Which of the following equations represents an oxidizing action of sulphur dioxide?
SO2 + 2HNO2 → H2SO4 + 2NO2 + heat
2SO2 + 2H2O + O2 → 2H2SO4
SO2 + 2H2O + CI2 → H2SO4 + 2HCI
SO2 + 2H2S → 3S + 2H2O
K2Cr2O7 + H2SO4 + 3SO2 → K2SO4 + Cr2(SO4)3 + H2O