In a reaction, 2Ag+2H2SO4→Ag2SO4+H2O+SO2, H2SO4 acts as:
In the reaction Ag2O+H2O2→2Ag+H2O+O2. H2O2 acts as :
In the reaction 2Ag + 2H2SO4→Ag2SO4 + 2H2O + SO2 sulphuric acid acts as
Which of the following is/are correct about SO2?