Verified Solution • 2025–26 Session moderate

QJEEM24Ch746a: JEE Main 2024 Chemistry - Class 12 JEEM24Ch746a Solution: Alkaline oxidative fusion of gives "A" which on electrolytic…

Alkaline oxidative fusion of MnO2\mathrm{MnO}_2 gives "A" which on electrolytic oxidation in alkaline solution produces B. A and B respectively are

Multiple Choice Options

  • A Mn2O3\mathrm{Mn}_2 \mathrm{O}_3 and MnO42−\mathrm{MnO}_4^{2-}
  • B Mn2O7\mathrm{Mn}_2 \mathrm{O}_7 and MnO4−\mathrm{MnO}_4^{-}
  • C MnO42−\mathrm{MnO}_4^{2-} and MnO4−\mathrm{MnO}_4^{-}
  • D MnO42−\mathrm{MnO}_4^{2-} and Mn2O7\mathrm{Mn}_2 \mathrm{O}_7

Step-by-Step Verified Solution

Alkaline oxidative fusion of MnO2\mathrm{MnO}_2 :

2MnO2+4OH−+O2→2MnO42−+2H2O2 \mathrm{MnO}_2+4 \mathrm{OH}^{-}+\mathrm{O}_2 \rightarrow 2 \mathrm{MnO}_4^{2-}+2 \mathrm{H}_2 \mathrm{O}

Electrolytic oxidation of MnO42−\mathrm{MnO}_4^{2-} in alkaline medium.

MnO42−→MnO4−+e−\mathrm{MnO}_4^{2-} \rightarrow \mathrm{MnO}_4^{-}+e^{-}

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