Which is the reducing agent in the reaction,
\[
\begin{aligned}
8 \mathrm{H}^{+}+4 \mathrm{NO}_{...
Which is the reducing agent in the reaction,
\[
\begin{aligned}
8 \mathrm{H}^{+}+4 \mathrm{NO}_{3}^{-}+6 \mathrm{Cl}^{-}+& \mathrm{Sn}(s) \underset{ }{\longrightarrow} \\
& \mathrm{SnCl}_{6}^{2-}+4 \mathrm{NO}_{2}+4 \mathrm{H}_{2} \mathrm{O} \text { ? }
\end{aligned}
\]
(A) \( \operatorname{Sn}(s) \)
(B) \( \mathrm{NO}_{3}^{-} \)
(C) \( \mathrm{Cl}^{-} \)
(D) \( \mathrm{NO}_{2}(\mathrm{~g}) \)
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