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Which of the two have almost similar siz...

Which of the two have almost similar size

A

`""_(22)Ti "and" ""_(40)Zr`

B

`""_(41)Nb "and" ""_(73) Ta`

C

`""_(39) Y "and" ""_(57)La`

D

`""_(20)Ca "and" ""_(31)Ir`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-D-BLOCK ELEMENTS-OBJECTIVE EXERCISE-1 (LANTHANIDES AND ACTINIDES)
  1. Which of the following is a lanthanide ?

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  2. Which of the two have almost similar size

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  3. In aqueous solutions Eu^(2+) acts as

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  4. The radius of La^(3+) (Z=57) is 1.06A^(@). Which one of the following ...

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  5. The actinide element which can exhibit +7 oxidation state in its compo...

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  6. Highest oxidation state exhibited by an actinide element in its compou...

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  7. Actinide that is naturally available with highest isotopic number

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  8. Which of the following Lanthanoid is radioactive

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  9. Which of the following pair of ions have same outer electronic configu...

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  10. Which of the following is strong oxidant ?

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  11. Among the following correct basic strength order is i) La(OH)3 , ii)...

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  12. More number of oxidation states are exhibited by the actinoids than by...

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  13. An 'f' block element without any f electron is

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  14. Larger number of oxidation states are exhibited by the actinoids than ...

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  15. Incorrect statement among the following is

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  16. Among the following largest ion is

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  17. 4f^(14) configuratoin is observed in

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  18. Which element among the lanthanides has the smallest atomic radius

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  19. The electronic configuration of Gadolinium (At. No.64) is

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  20. Across the lanthanide series, the basic strength of the lanthanide hyd...

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