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Pyrolusite is used to prepare potassium ...

Pyrolusite is used to prepare potassium permanganate `MnO_(2)overset(X)toMnO_(4)^(2)overset(Y)toMnO_(4)`X and Y are

A

Fuse with `KOH`/air, electrolytic oxidation

B

fuse with `KOH//KNO_(3)`, electrolytic reduction

C

fuse with concentrated `HNO_(3)`/ air , electrolytic reduction

D

dissolve in `H_(2)O`. oxidation

Text Solution

Verified by Experts

The correct Answer is:
AB
`2MnO_(2)+4KOh+O_(2)(KCO_(3)) to 2K_(2)MnO_(4)+2H_(2)O`.
`MnO_(4)^(2-)underset("oxidation") overset("electrolytic")to MnO_(4)^(-) +e^(-)`.
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RESONANCE ENGLISH-D BLOCK ELEMENTS-EXERCISE-2 PART-II
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  3. The number of moles of KMnO4 that are needed to react completely with ...

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  4. Super conductors are derived from compound of:

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  6. Which of the following statement(s) is/are correct?

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  7. Following reaction (s) is /are involved in the iodometric estimation

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  8. The colour of the transition metal ions is//are due to:

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  9. Which of the following statement(s) is/are not correct.

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  10. Select correct statement(s).

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  11. Correct statements about transition metals are that they:

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  12. Transition elements have greater tendency to form complexes because

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  14. Which of the following reaction(s) is/are incorrect for silver nitrate...

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  15. Which of the following reaction(s) is /are used for the preparation of...

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  16. Which of the following is//are false?

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  17. Which of the following chemical reaction(s) is/are involved in develop...

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  18. Pyrolusite is used to prepare potassium permanganate MnO(2)overset(X)t...

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  19. Which is/are correct statement?

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  20. When CO(2) is passed into aqueous:

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