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Two lanthanoids ............. and .........

Two lanthanoids ............. and ............. show +4 oxidation states.

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. Equivalent weight of K2Cr2O7 in acidic medium is ................ .

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  2. CrO3 is an acidic hydride of ............. .

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  3. Two lanthanoids ............. and ............. show +4 oxidation stat...

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  4. The formula of Prussion blue is ................ .

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  5. The actinoid used for manufacture of fine rods for atomic reactors is ...

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  6. The last element in the actinoid series is :

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  7. Choose the correct alternative: Cerium (Z = 58) exhibits +2/+4 oxidati...

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

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  9. NO2^(-) is oxidised to N2/NO3^(-) by acidified KMnO4.

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  10. What happens when 95% of copper combine with 4% of tin and 1% of phosp...

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  11. Misch metal alloy contains about 95% lanthanoid/actinoid metals.

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  12. Baeyer's reagentisalkaline alkaline KMnO4/alkaline K2Cr2O7 solution.

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  13. Ionic radius of Ce^(3+)(Z = 58) is less/more than that of Yb^(3+) (Z =...

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  14. Number of unpaired electrons in gadolinium (Z = 64) is 8/6.

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  15. Colour of acidic K2Cr2O7 solution is orange / yellow .

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  16. Mn2O3 is acidic/basic oxide.

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  17. Pt^(4+) is less/more stable than Ni^(4+) .

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  18. Density of Mn is more/ less than Fe.

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  19. The number of unpaired electrons in Fe^(3+) ion is:

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  20. What is the number of unpaired electrons in : Cu^(+)?

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