In the reaction, ${\rm{S}}{{\rm{O}}_2} + 2{{\rm{H}}_2}{\rm{S}} \to 3{\rm{S}} + 2{{\rm{H}}_2}{\rm{O}}$ the substance that oxidizes is,

NEET UG CHEMISTRY MCQ: REDOX REACTIONS

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In the reaction,

\mathrm{S}{\mathrm{O}_2} + 2{\mathrm{H}_2}\mathrm{S} \to 3\mathrm{S} + 2{\mathrm{H}_2}\mathrm{O}

the substance that oxidizes is,

View answer and explanation

Correct option: A

{\mathrm{H}_2}\mathrm{S}

Option A (

\mathrm{H}_2\mathrm{S}

) is correct because H2S is oxidized in the reaction, losing electrons and causing the reduction of SO2.

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{I_2}

\mathrm{MnO}_4^ - + {\mathrm{C}_2}\mathrm{O}_4^{2 - } + {\mathrm{H}^ + } \to \mathrm{M}{\mathrm{n}^{2 + }} + \mathrm{C}{\mathrm{O}_2} + {\mathrm{H}_2}\mathrm{O}

\mathrm{MnO}_4^ -

{\mathrm{C}_2}\mathrm{O}_4^{2 - }

{\mathrm{H}^ + }