\[
\begin{array}{l}
\mathrm{AgNO}_{3} \stackrel{\Delta}{\longrightarrow}(W)+(X)+\mathrm{O}_{2} \...
\[
\begin{array}{l}
\mathrm{AgNO}_{3} \stackrel{\Delta}{\longrightarrow}(W)+(X)+\mathrm{O}_{2} \\
(X)+\mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{HNO}_{2}+\mathrm{HNO}_{3} \\
(W)+\mathrm{HNO}_{3} \longrightarrow Y+\mathrm{NO}+\mathrm{H}_{2} \mathrm{O} \\
(Y)+\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3} \text { (excess) } \longrightarrow(Z)+\mathrm{NaNO}_{3}
\end{array}
\]
\( \mathrm{P} \)
W
Identify \( (W) \) to \( (Z) \).
(a) \( W=\mathrm{Ag} \quad X=\mathrm{N}_{2} \mathrm{O} \quad Y=\mathrm{AgNO}_{3} Z=\mathrm{Na}_{2}\left[\mathrm{Ag}\left(\mathrm{S}_{2} \mathrm{O}_{3}\right)_{2}\right] \)
(b) \( W=\mathrm{Ag}_{2} \mathrm{O} \quad X=\mathrm{NO} \quad Y=\mathrm{AgNO}_{3} Z=\mathrm{Na}_{3}\left[\mathrm{Ag}\left(\mathrm{S}_{2} \mathrm{O}_{3}\right)_{2}\right] \)
(c) \( W=\mathrm{Ag} \quad X=\mathrm{NO}_{2} \quad Y=\mathrm{AgNO}_{3} \quad Z=\mathrm{Na}_{3}\left[\mathrm{Ag}\left(\mathrm{S}_{2} \mathrm{O}_{3}\right)_{2}\right] \)
(d) \( W=\mathrm{Ag}_{2} \mathrm{O} \quad X=\mathrm{N}_{2} \quad Y=\mathrm{AgNO}_{3} \quad Z=\mathrm{Na}\left[\mathrm{Ag}\left(\mathrm{S}_{2} \mathrm{O}_{3}\right)_{2}\right] \)
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