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Lanthanoid contraction is caused due to:...

Lanthanoid contraction is caused due to:

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Lanthanoid contraction is because of poor shielding effect of 4f electrons.
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DINESH PUBLICATION-D-AND -F BLOCK ELEMENTS-Question From Board Examination
  1. Which out of the two ,La(OH)(3) and Lu(OH)(3), is more basic and why?

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  2. Why are Zn, Cd and Hg quite soft and have low melting points ?

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  3. Lanthanoid contraction is caused due to:

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  4. What may the possible oxidation state of transition metals with the fo...

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  5. Discuss the relative stability in aqueous solution of +2 oxidation sta...

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  6. How many unpaired electrons are present in Mn^(2+) ion ? How do they i...

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  7. Complete the following chemical equations for reactions in aqueous sol...

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  8. There is a greater range of variable oxidation states among the actino...

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  9. Why is ghere a general increase in density of elements from titanaium ...

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  10. Three occurs much more frequently metal-metal bonding in the compound...

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  11. Why is Cu^(+) ion not stable in aqueous solution ? or Why is Cu^(+...

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  12. Complete the following : (i) Cr(2)O(7)^(2-)(aq)+H(2)S(g)+H^(+)(aq) t...

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  13. Which is a stronger reducing agent Cr^(2+) or Fe^(2+) and why?

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  14. Among the divalent cations in the first transition series, manganese e...

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  15. La^(3+)(Z=57) and Lu^(3+)(Z=71) do not show any colour in solution. As...

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  16. Transition element act as good catalysts because

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  17. The atomic radii of the metals of the third (5d) series of transitions...

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  18. Explain why zinc is not rgardede as a transition element.

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  19. Explain why is Ce^(4+) ion a strong oxidising agent ?

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  20. Describe the oxidising property of KMnO(4) in neutral or faintly alkal...

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