HgNO32⟶ΔW+X+O2 X+H2O⟶HNO2+HNO3 W+HNO3⟶Y+NO+H2O Y+Na2S2O3( excess )⟶Z+NaNO3
W - Hg, X - N2O, Y - HgNO32 Z - Na2HgS2O32
W - HgO, X - NO Y - HgNO32 Z - NaHgS2O32
W - Hg X -NO2 , Y - HgNO32 Z - Na2HgS2O32
W- Hg, X - N2O3, Y - HgNO32 Z - Na3HgS2O32
HgNO32⟶ΔHg(l)+NO2↑+O2↑ (W) (X)
2NO2+H2O⟶HNO2+HNO3 Hg+4HNO3⟶ΔHgNO32+2NO↑+2H2O (w) (dil.) (Y) HgNO32+Na2S2O3⟶Na2HgS2O32+2NaNO3 (Soluble) (Z)