D-And F-Block Elements Ques 440

Question: Pyrolusite in $ MnO_2 $ is used to prepare $ KMnO_4 $ . Steps are $ MnO_2\xrightarrow{I}MnO_4^{2-}\xrightarrow{II}MnO_4^{-} $ Here, I and II are

Options:

A) fused with KOH/air, electrolytic oxidation

B) fuse with cone. HN03/air, electrolytic oxidation

C) fused with KOH/air, electrolytic reduction

D) All are correct

Show Answer

Answer:

Correct Answer: A

Solution:

$ 2MnO_2\xrightarrow[Oxidation,with,air]{Fused,with,KOH}MnO_4^{2-} $ and $ MnO_4^{2-}\xrightarrow[in,alkaline,solution]{Electrolytic,oxidation}MnO_4^{-} $



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