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Arrange Ce^(3+),La^(3+), Pm^(3) and Yb^(...

Arrange `Ce^(3+),La^(3+), Pm^(3)` and `Yb^(3+)` in increasing order of their size -

A

`Yb^(3+)ltPm^(3+)ltCe^(3+)ltLa^(3+)`

B

`Ce^(3+)gtYb^(3+)ltPm^(3+)La^(3+)`

C

`Yb^(3+)Pm^(3+)ltLa^(3+)ltCe^(3+)`

D

`Pm^(3+)ltLa^(3+)ltCe^(3+)ltYb^(3+)`

Text Solution

Verified by Experts

The correct Answer is:
A
Due to lanthnide contraction left to right ionic size decreases.
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BANSAL-D AND F BLOCK ELEMENTS-Exercise-1 (Single Correct Choice Type)
  1. Arrange Ce^(3+),La^(3+), Pm^(3) and Yb^(3+) in increasing order of the...

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  2. Which of the following is not a characteristic property of transition...

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  3. The atomic numbers of vanadium (V). Chromium (Cr), managanese (Mn) and...

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  4. Transition metals ions form interstial compounds because-

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  5. Paramagnetism is a property due to the presence of unpaired electrons....

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  6. The ion pair of the following in which both the ions have unpaired ele...

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  7. What happen when a solution of potassium chromate is treated with an e...

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  8. Transition elements act as catalyst because-

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  9. The radius of La^(+) (at no 57) is 1.06Å. What may be the radius of Lu...

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  10. Calomel is the name of

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  11. Cerium (Z= 58) is an important nember of the lanthanoids . Which of th...

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  12. Excess of KI reacts with CuSO(4) solution and Na(2)SO(3) solution is a...

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  13. Formula of chromyl chloride is-

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  14. Calomel (H(2)Cl(2)) on reaction with ammonium hydroxide gives

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  15. The reaction, 2Cu^(+)toCu+Cu^(2+) is called-

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  16. The lanthanide contraction is responsible for the fact that

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  17. Amongst [TiE(6)]^(2-), [CoF(6)]^(3-), Cu(2)Cl(2) and [NiCl(4)]^(2-) [A...

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  18. Lanthanoid contraction is caused due to:

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  19. CrO(3) is a//an"….."

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  20. Which of the following is expected to have lowest magnetic moment-

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