Q.

HgNO32⟶ΔW+X+O2 X+H2O⟶HNO2+HNO3 W+HNO3⟶Y+NO+H2O Y+Na2S2O3( excess )⟶Z+NaNO3

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a

W - Hg,   X - N2O,   Y - HgNO32    Z - Na2HgS2O32

b

W - HgO,    X - NO  Y - HgNO32     Z -  NaHgS2O32

c

W - Hg     X -NO2 ,   Y - HgNO32     Z - Na2HgS2O32

d

W- Hg, X - N2O3, Y - HgNO32 Z - Na3HgS2O32

answer is C.

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Detailed Solution

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)
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