Окислительные свойства оксид серы (6) проявляет в реакции а)  SO2+ NaOH=NaHSO3
 б) SO2+Br2+H2O=H2SO4+2HBr
  в)SO2+2H2S=3S+2H2O
 г)SO2+O2=2SO3
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