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Why are I.E. of 5d - elements greater th...

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

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. Why Cu(l) is colourless and Cu(ll) is blue in colour ?

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  2. Write any two consequences of lanthanoids contraction.

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

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  4. Write the general electronic configuration of transition elements.

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  5. Give three differences between lanthanides and actinides.

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

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  7. What happens when: K2Cr2O7 is heated ?

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

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

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  10. What are the main consequences of lanthanoid contraction ?

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  11. What happens when K2Cr2O7 reacts with NaCl in the presence of conc. H2...

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  12. What happens when Acidified KMnO4 reacts with H2S?

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  13. Explain why TiCl3 is coloured but TiCl4 is colourless ?

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  14. Why transition metals show catalytic properties?

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  15. Compare the chemistry of actinides with that of the lanthanides with...

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

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  17. Why transition elements form a large number of alloys ?

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  18. Write chemical reaction for preparation of K2Cr207 from chromite ore.

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  19. What are the main consequences of lanthanoid contraction ?

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  20. Why transition metals show catalytic properties?

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