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MnO(2) overset(I)(to)MnO(4)^(2-)overset(...

`MnO_(2) overset(I)(to)MnO_(4)^(2-)overset(II)(to)MnO_(4)^(-)` I and II are

A

fuse with KOH/air, electrolytic oxidation

B

fuse with KOH/air, electrolyltic reduction

C

fuse with conc. `HNO_3` /air, electrolytic reduction

D

dissolve in `H_2 O` oxidation

Text Solution

Verified by Experts

The correct Answer is:
A
`2MnO_(2) + 4 KOH + O_2 to 2 K_2 MnO_(4) + 2 H_2 O`
`MnO_(4)^(2-)` can be oxidised to `MnO_(4)^(-)` electrovhemically at anode .
At anode ` : Mn O_(4)^(2-) to MnO_(4)^(2-) to MnO_(4)^(-) + e^(-) ,` At cathode `: 2 H^(+) + 2e^(-) to H_2 `
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BRILLIANT PUBLICATION-THE D-AND F-BLOCK ELEMENTS-QUESTIONS (LEVEL-III)
  1. The acidic, basic or amphoteric nature of Mn2 O7 ,V2O5, and CrO are re...

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  2. An inorganic compound on strong heating gave a blackish brown powder a...

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  3. MnO(2) overset(I)(to)MnO(4)^(2-)overset(II)(to)MnO(4)^(-) I and II are

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  4. Identify the product and its colour when MnO2 is fused with solid KOH ...

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  5. When manganous salt is fused with a mixture of KNO3 and solid NaOH, th...

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  6. Consider following statements, I. The size of the lanthanide M^(3+) io...

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  7. Most transition metals I:forms sets of compounds which display differe...

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  8. [Fe(H2 O)5 NO]^(2+) is brown-ring complex. In this complex

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  9. When K2 CrO4 is added to CuSO4 solution, there is formation of CuCrO4...

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  10. Select the correct statements(s)

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  11. Which of the following statements are true?

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  12. Although +3 is the characteristic oxidation state for lanthanoids, cer...

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  13. Select correct statements.

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  14. When CO2 is passed into aqueous

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  15. Select correct statements (s)

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  16. Which of the following statements are correct

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  17. Amongst the following, identify the species with an atom in +6 oxidati...

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  18. Which metals are present in german silver?

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  19. The complex forming tendency of a transition metal depends upon:

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  20. The correct statements about Cr^(2+) and Mn^(3+) is (are) (Atomic numb...

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