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Because of lanthnoid contraction, which ...

Because of lanthnoid contraction, which of the following pairs of elements have nearly same atomic radii ? (Number in the parenthesis are atomic numbers)

A

Zr(40) and Hf(72)

B

Zr(40) and Ta(73)

C

Ti(22) and Zr(40)

D

Zr(40) and Nb(41)

Text Solution

Verified by Experts

The correct Answer is:
A
Because of lanthanoid contraction, Zr and Hf have same atomic radii.
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MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-COMPETITION FILE (MULTIPLE CHOICE QUESTION ((B) MULTIPLE CHOICE QUESTION FROM COMPETITIVE EXAMINATION))
  1. Among the transition metals of 3d series, that one that has the highes...

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

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

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

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

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

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

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

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

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  10. The magnitude and permanganate ions are tetrahedral due to

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

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

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  13. The maximum oxidation state exhibited by actinide ions is

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  14. KMnO4 gets reduced to

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

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  16. In context of the lanthanoids, which of the following statements is no...

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  17. Iron exhibits +2 and +3 oxidation states. Which of the following state...

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  18. When H(2)O(2) is shaken with an acidified solution of K(2)Cr(2)O(7) in...

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  19. Four successive members of the first series of transition metals are l...

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  20. Which of the following arrangements does not represent the correct ord...

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