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Reason of lanthanoid contraction is...

Reason of lanthanoid contraction is

A

negligible screening effect of 'f'-orbitals

B

increasing nuclear charge

C

decreasing nuclear charge

D

decreasing screening effect.

Text Solution

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The correct Answer is:
A
negligible screening effect of .f.-orbitals
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MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-COMPETITION FILE (MULTIPLE CHOICE QUESTION ((B) MULTIPLE CHOICE QUESTION FROM COMPETITIVE EXAMINATION))
  1. Which of the following does not give oxygen on heating ?

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  2. Which of the following lanthanoid ions is diamagnetic ? (At nos . Ce...

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  3. Reason of lanthanoid contraction is

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  4. The reaction of aqueous KMnO4 with H2O2 gives

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  5. Magnetic moment 2.83 BM is shown by which of the following ions?

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  6. Among the transition metals of 3d series, that one that has the highes...

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  7. Gadolinium belongsd to 4f series. It's atomic number is 64. which of t...

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  8. Because of lanthnoid contraction, which of the following pairs of elem...

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  9. The electronic configuration of Eu (Atomic No. 63), Gd (Atomic No. 64)...

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  10. Which one of the following statements related to lanthanons is incorre...

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  11. Name the gas that can readily decolourise acidified KMnO(4) solution:

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  12. The reason for greater range of oxidation state in actinoids is attrib...

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  13. Which one of the following ions exhibits d-d transition and paramagnet...

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  14. Match the metal ions given in Column I with the spin magnetic moments ...

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  15. The magnitude and permanganate ions are tetrahedral due to

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  16. Amount of oxalic acid present in a solution can be determined by its t...

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  17. Mark the correct statements(s) (1) Manganeses exhibits +7 oxidation ...

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  18. The maximum oxidation state exhibited by actinide ions is

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  19. KMnO4 gets reduced to

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  20. The bonds present in the structure of dichromate ion are

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