In the reactions;${\rm{A}}{{\rm{s}}_2}{{\rm{S}}_3} + {\rm{HN}}{{\rm{O}}_3} \to {{\rm{H}}_3}{\rm{As}}{{\rm{O}}_4} + {{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4} + {\rm{NO}}$, the element oxidized is/ are :

JEE CHEMISTRY MCQ: REDOX REACTIONS

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In the reactions;

\mathrm{A}{\mathrm{s}_2}{\mathrm{S}_3} + \mathrm{HN}{\mathrm{O}_3} \to {\mathrm{H}_3}\mathrm{As}{\mathrm{O}_4} + {\mathrm{H}_2}\mathrm{S}{\mathrm{O}_4} + \mathrm{NO}

, the element oxidized is/ are :

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Correct option: D

As and S both

Option D is correct. In the given reaction, both Arsenic (As) and Sulfur (S) are oxidized.

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\mathrm{H}

2 \mathrm{KClO}_3 \longrightarrow 2 \mathrm{KCl}+3 \mathrm{O}_2

\mathrm{HNO}_3

\mathrm{HNO}_3

\mathrm{MnO}_4^{-}(\mathrm{aq})+\mathrm{Br}^{-}(\mathrm{aq})+\mathrm{H}_2 \mathrm{O} \longrightarrow 2 \mathrm{MnO}_2(\mathrm{aq})+\mathrm{BrO}_3^{-}(\mathrm{aq})+2 \mathrm{OH}^{-}(\mathrm{aq})

\mathrm{Br}

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+5.