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Assign reasons for the following: Sc^(...

Assign reasons for the following:
`Sc^(3+)` ion is colourless while `Cr^(3+)` is coloured.

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ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(LONG ANSWER QUESTIONS)
  1. Assign reasons for the following : (b) The ionization energy of 5d e...

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  2. Assign reasons for the following : Write equations for the preparati...

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  3. Assign reasons for the following: Sc^(3+) ion is colourless while Cr...

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  4. Why are Mn^(2+) compounds more stable than Fe^(2+) towards oxidation t...

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  5. Assign reasons for the following: Cu(I) compounds are white and diam...

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  6. Assign reasons for the following: Why is the chemistry of all lantha...

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  7. Assign reasons for the following: What is lanthanoid contraction ? E...

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  8. How and you account for the following : (i) Cabalt (II) is stable in...

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  9. Why Sm^(2+) , Eu^(2+) and Yb^(2+) ions are good reducing agents , but ...

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  10. Compare the properties of lanthanoids and actinoids.

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  11. Given below are the electrode potential values, E^(Theta) for some of ...

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  12. Complete the following chemical reaction equations : (i) Cr(2)O(7)^(...

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  13. Decribe the general trends in the following properties of the first se...

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  14. Assign reasons for each of the following (i) Trasitiono elements exh...

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  15. (a) Complete the following chemical reaction equations : (i) MnO(4(a...

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  16. Explain the following observations about the transition/ inner-transit...

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  17. Complete the follwing chemical equations for reactions : (i) Fe^(@+...

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  18. Give an explanation for each of the following observations: (i) The...

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  19. Complete the follwing chemical equations for reactions : (i) Fe^(@+...

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  20. Explain the following observations: (i) Transition elements are know...

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