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Pyrolusite is MnO(2) used to prepare KMn...

Pyrolusite is `MnO_(2)` used to prepare `KMnO_(4)`. Steps are, `MnO_(2)overset(I)(rarr)MnO_(4)^(2-)overset(II)(rarr)MnO_(4)^(-)` Steps I and II are respectively`:`

A

fuse with KOH/air, electrolytic oxidation

B

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

C

fise with concentrated `HNO_(2)`air, electrolytic reduction

D

dissolve in `H_(2)O` oxidation.

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The correct Answer is:
A, B
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Pyrolusite is MnO_(2) used to prepare KMnO_(4) step are: MnO_(2)undersetto(I)MnO_(4)^(2-)undersetto(II)MnO_(4)^(-) Step I and II are respectively:

overset (MnO_(2)) Product

overset (MnO_(2)) Product

KMnO_(4) overset(Delta) to K_(2)MnO_(4)+MnO_(2)+O_(2)uarr

The product 'A' in the equation" 2KMnO_(4)overset(Delta)rarrA+MnO_(2)+O_(2)

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RESONANCE-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 2
  1. Transition elements have greater tendency to form complexes because th...

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  2. Which of the following statements are correct?

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  3. The melting point of Zn is lower as compared to those of the other ele...

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  4. The less stable oxidation states of Cr are:

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  5. Which of the following statement is/are correct?

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  6. Select correct statement(s).

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  7. The colour of the transition metal ions is due to

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  8. Which of the following chemical reaction(s) is//are involved in develo...

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  9. Which of the following statement are correct when a mixture of NaCl a...

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

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  11. Pyrolusite is MnO(2) used to prepare KMnO(4). Steps are, MnO(2)overset...

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  12. Which of the following statements are correct.

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  13. Transition metals usually from coloured complexes and d-d transitions ...

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  14. Transition metals usually from coloured complexes and d-d transitions ...

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  15. Pyrolusite ore on oxidation with KCIO(3)//KNO(3) in basic medium produ...

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  16. Pyrolusite ore on oxidation with KCIO(3)//KNO(3) in basic medium produ...

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  17. Pyrolusite ore on oxidation with KCIO(3)//KNO(3) in basic medium produ...

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  18. . Q. Which combination is correct:

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  19. . Q. Which combination is/are not correct

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  20. . Q. Which combination is correct for Ni.

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