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Arrange Ce^(3+) (Z = 58), Sm^(3+) (Z = 6...

Arrange `Ce^(3+) (Z = 58), Sm^(3+) (Z = 62) and Yb^(3+)(Z = 70)` in decreasing order of ionic radii.

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. How many unpaired electrons are present in Gd(Z = 64) ?

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  2. Name the actinoid used for the manufacture of fine rods for atomic rea...

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  3. Arrange Ce^(3+) (Z = 58), Sm^(3+) (Z = 62) and Yb^(3+)(Z = 70) in decr...

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  4. Name the basic cause of similar atomic radii of Hf and Zr.

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  5. Does actinoids show actinoid contraction similar to lanthanoid contrac...

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  6. Name the trivalent lanthanoid having the configuration [Xe] 4f^7.

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  7. Which of the following ion is colourless ? U^(3+), Cm^(4+), Th^(4+)

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  8. Name two tripositive lanthanoid ions which are colourless.

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  9. Express 2111 in roman numbers.

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  10. Express 2112 in roman numbers.

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  11. Express 2113 in roman numbers.

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  12. Express 2115 in roman numbers.

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  13. Express 2116 in roman numbers.

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  14. True of False : In Cr2O7^(2-), all Cr-O bonds are equivalent.

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  15. True of False : Ti(III) compounds are coloured while Ti (IV) compounds...

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  16. True of False : CuCl4^(2-) exists but CuI4^(2-) does not.

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  17. What is the oxidation state of Cr in CrO5.

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  18. True of False : Lanthanide compounds are less basic than actinide comp...

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  19. Complete the missing links: In CrO4^(2-) ion, Cr is .......... hybridi...

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  20. Write the general electronic configuration of transition elements.

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