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Which of the following ion is colourless...

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

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. Does actinoids show actinoid contraction similar to lanthanoid contrac...

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

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

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  4. Name two tripositive lanthanoid ions which are colourless.

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  5. Express 2111 in roman numbers.

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  6. Express 2112 in roman numbers.

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  7. Express 2113 in roman numbers.

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  8. Express 2115 in roman numbers.

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  9. Express 2116 in roman numbers.

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

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

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

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

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

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

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  16. Write the general electronic configuration of transition elements.

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  17. What is the most common oxidation state in the Lanthanoids ?

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  18. What happens when 88% of copper, 10% of tin and 2% of zinc combine tog...

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  19. The chromate ion in acidic medium changes to ............. ion.

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  20. The formula of chromite is .............. .

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