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What is lanthanoid contraction ?...

What is lanthanoid contraction ?

A

Zr and Y have about the same radius

B

Zr and Nb have similar oxidation state

C

Zr and Hf have about the same radius

D

Zr and Zn have the same oxidation state.

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What is Lanthanide contraction ? What is the cause and consequences of Lanthanide contraction ?

What is Actinoid contraction ? Explain it.

Does actinoids show actinoid contraction similar to lanthanoid contraction ?

Actinoid contraction is greater from element to element than lanthanoid contraction. Why?

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. The hybridisation of Cr in Cr2O7^(2-) ion is

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  2. In alkaline medium, equivalent weight of KMnO4 is ,

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  3. What is lanthanoid contraction ?

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  4. In acidic medium the equivalent weight of K2Cr2O7, is :

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  5. Ammonium dichromate is used in fireworks. The green coloured powder bl...

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

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  7. The number of unpaired electrons in Ni^(2+) is :

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  8. The electronic configuration of terbium (IV) (At. No. 65) is

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  9. Which of the following statement is not correct ?

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

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  11. Give-one reaction in each case to show that H(2)O(2) is an reducin...

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

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

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  14. In which of the following pairs, both the ions are coloured in aqueous...

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

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

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

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  18. Transition elements exhibit a large number of oxidation states.Explain...

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

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

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