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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

Zr( 40) andHf ( 72) lie in the same group and Hf comes after La. Hence, Zr and Hf have nearly same size due to lanthanoid contraction.
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PRADEEP-D- AND F-BLOCK ELEMENTS-COMPETITIONS FOCUS
  1. Which of the following exhibits only +3 oxidation state?

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  2. Lanthanide contraction is observed in:

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

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

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  5. The correct order of ionic radii of Ce, La, Pm and Yb in +3 oxidation ...

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  6. Identify the incorrect statement among the following:

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  7. Knowing that the chemistry of lanthanoids (Ln) is dominated by its +3 ...

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  8. Among the following lanthanoid ions, the paramagnetic ion is

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  9. Consider the following statement in respect of Lantinanoids : (i) Th...

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

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  11. Consider the following statements: (I) La(OH)(3) is the least b...

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  12. Which is not the correct statement about the chemistry of 3d and 4f se...

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  13. Which of the following elements shows maximum number of different oxid...

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  14. Which of the following is not an actinoid ?

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  15. Among the following pairs the maximum, oxidation states is shown by

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  16. The actinoids exhibit more number of oxidation states in general than ...

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

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  18. Reason of lanthanoid contraction is

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

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  20. All Cu(II) halides are known except the iodide. The reason for it is t...

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