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Why are Mn^(2+) compounds more stable th...

Why are `Mn^(2+)` compounds more stable than `Fe^(2+)` compounds towards oxidation to their +3 state ?

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. How do you prepare: K2MnO4 from MnO2 ?

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  2. How do you prepare: Na2Cr2O7 from Na2CrO4 ?

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  3. Why are Mn^(2+) compounds more stable than Fe^(2+) compounds towards o...

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  4. To what extent do the electronic configurations decide the stability o...

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  5. How would you account for the following: There is a greater range of o...

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  6. The element of second transition series which shows maximum number of ...

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  7. Express 1366 in roman numbers.

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  8. Why Cr^(2+) is strongly reducing while Mn^(3+) is strongly oxidising ?

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  9. Name the members of lanthanoid series which exhibit +2 O.S. Assign rea...

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  10. Express 1367 in roman numbers.

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  11. Why Cu(l) is colourless and Cu(ll) is blue in colour ?

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  12. Write any two consequences of lanthanoids contraction.

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  13. Why are I.E. of 5d - elements greater than 3d- elements ?

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  14. Write the general electronic configuration of transition elements.

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  15. Give three differences between lanthanides and actinides.

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  16. What happens when: KMnO4 is heated at 746 K ?

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  17. What happens when: K2Cr2O7 is heated ?

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  18. Explain why [Ti (H2O)6]^(3+) is violet while [Ti (H2O)6]^(4+) is colou...

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  19. Transition metals form alloys with other transition metals. Explain.

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  20. What are the main consequences of lanthanoid contraction ?

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