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NEET UG CHEMISTRY MCQ: REDOX REACTIONS

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Which reaction indicates the oxidising behavior of H2SO4{\mathrm{H}_2}\mathrm{S}{\mathrm{O}_4}
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Correct option: D
2HI+H2SO4→I2+SO2+2H2O2\mathrm{HI} + {\mathrm{H}_2}\mathrm{S}{\mathrm{O}_4} \to {\mathrm{I}_2} + \mathrm{S}{\mathrm{O}_2} + 2{\mathrm{H}_2}\mathrm{O}
Option D (2HI+H2SO4→I2+SO2+2H2O2\mathrm{HI} + {\mathrm{H}_2}\mathrm{S}{\mathrm{O}_4} \to {\mathrm{I}_2} + \mathrm{S}{\mathrm{O}_2} + 2{\mathrm{H}_2}\mathrm{O}) is correct because H2SO4 oxidizes HI to I2, indicating its oxidizing behavior.

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The oxidation state of iron in sodium nitroprusside is : Titrations in which liberated I2{I_2} is estimated to carry out the volumetric estimations are known as ….titrations. It is found that V forms a double salt isomorphous with Mohr’s salt. The oxidation number of V in this compound is : For redox reaction, MnO4−+C2O42−+H+→Mn2++CO2+H2O\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} coefficient of reactants in balanced states are MnO4−\mathrm{MnO}_4^ -, C2O42−{\mathrm{C}_2}\mathrm{O}_4^{2 - }, H+{\mathrm{H}^ + } Which one of the following reaction is possible at anode? The couple having oxidised and reduced forms of a substance taking part in an oxidation or reduction half-reaction is called
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