JEE MAIN - Chemistry (2024 - 30th January Evening Shift - No. 13)

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

$$\mathrm{Mn}_2 \mathrm{O}_3$$ and $$\mathrm{MnO}_4^{2-}$$

$$\mathrm{Mn}_2 \mathrm{O}_7$$ and $$\mathrm{MnO}_4^{-}$$

$$\mathrm{MnO}_4^{2-}$$ and $$\mathrm{MnO}_4^{-}$$

$$\mathrm{MnO}_4^{2-}$$ and $$\mathrm{Mn}_2 \mathrm{O}_7$$

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

$$2 \mathrm{MnO}_2+4 \mathrm{OH}^{-}+\mathrm{O}_2 \rightarrow 2 \mathrm{MnO}_4^{2-}+2 \mathrm{H}_2 \mathrm{O}$$

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

$$\mathrm{MnO}_4^{2-} \rightarrow \mathrm{MnO}_4^{-}+e^{-}$$