${\rm{MnO}}_4^ - $ is a good oxidising agent in different medium changing to ${\rm{MnO}}_4^ - \to {\rm{M}}{{\rm{n}}^{2 + }}$,$ \to {\rm{MnO}}_4^{2 - }, \to {\rm{Mn}}{{\rm{O}}_2}, \to {\rm{M}}{{\rm{n}}_2}{{\rm{O}}_3}$ Changes in oxidation number respectively are

JEE CHEMISTRY MCQ: REDOX REACTIONS

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\mathrm{MnO}_4^ -

is a good oxidising agent in different medium changing to

\mathrm{MnO}_4^ - \to \mathrm{M}{\mathrm{n}^{2 + }}

\to \mathrm{MnO}_4^{2 - }, \to \mathrm{Mn}{\mathrm{O}_2}, \to \mathrm{M}{\mathrm{n}_2}{\mathrm{O}_3}

Changes in oxidation number respectively are

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Correct option: C

5,1,3,4

Option C (5,1,3,4) is correct because it accurately reflects the changes in oxidation number of Mn in the given transformations.

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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}

-1

+5.