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  • On the reaction of moist with potassium permanganate (Acidic), the one which is correct

On the reaction of moist \mathrm{SO}_{2} with potassium permanganate (Acidic), the one which is correctly observed?

Option: 1

Colour of \mathrm{KMnO}_{4} is decolourised


Option: 2

\mathrm{SO}_{2}  is oxidised to \mathrm{SO}_{3}


Option: 3

\mathrm{MnO}_{4}^{-} is reduced to \mathrm{MnO}_{2}


Option: 4

All of these

 


Answers (1)

best_answer

5 \mathrm{SO}_{2}+\underset{\text { Pink coloured }}{2 \mathrm{MnO}_{4}{ }^{-}}+2 \mathrm{H}_{2} \mathrm{O} \longrightarrow 5 \mathrm{SO}_{4}{ }^{2-}+4 \mathrm{H}^{+}+\underset{\text { Colourless }}{2 \mathrm{Mn}^{2+}}

The reduction of \mathrm{Mn}^{7+}to \mathrm{Mn}^{2+}result in decolourization of \mathrm{KMnO}_{4}.

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