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How many moles of electrons are required...

How many moles of electrons are required to
reduce 1 mol of `MnO_4^-` to `Mn^(2+)`?

A

3, 5, 4 and 1

B

4, 3, 1 and 5

C

1, 3, 4 and 5

D

5, 4, 3 and 1.

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. Which of the following statement is not correct ?

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  2. In the standardisation of Na2S2O3 using K2Cr2O7 by iodometry, the equi...

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  3. How many moles of electrons are required to reduce 1 mol of MnO4^- to ...

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  4. The basic character of the transition metal monoxides follows the orde...

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  5. The correct order of ionic radii of Y^(3+), La^(3+), Eu^(3+) and Lu^(3...

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  6. Which one of the following ions will exhibit colour in aqueous solutio...

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  7. The number of moles of KMnO4 that will be needed to react with one ...

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  8. Which one of the following ions will exhibit colour in aqueous solutio...

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  9. The correct order of decreasing second ionisation enthalpy of Ti (22),...

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  10. Which of the 3d-series of transition elements exhibits the largestn nu...

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  11. Which one of the following ions will exhibit colour in aqueous solutio...

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  12. Which of the following pairs has the same size ?

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  13. Acidified K2Cr2O7 solution turns green when Na-2SO3, is added to it. T...

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  14. Draw lewis structure of H2S

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  15. Which of the following statements is not true?

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  16. Which of the following does not give oxygen on heating ?

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  17. Which of the following lanthanoid ions is diamagnetic ? (At. nos. Ce...

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  18. Reason of lanthanoid contraction is :

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  19. The reaction of acidified KMnO4 with H2O2 gives .

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  20. The pair of compounds that cannot exist together is :

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