F-Block Elements MCQs [Chemistry]

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1. : The lanthanides contraction is responsible for the fact that



2. : How many elements are members of lanthanides?



3. : Which of the mentioned are important minerals of lanthanides?



4. : What is the % of Ce-earths in Monazite?



5. : Which of the mentioned statements is not true with regard to misch metals use?



6. : Which of the mentioned classical methods is used to separate lanthanides?



7. : Which of the mentioned modern methods is used to separate lanthanides?



8. : Which are the elements in which the additional electron enters (n-2) f orbital?



9. : What is the another name for 4f block elements?



10. : The +2 and +4 oxidation states is shown by which lanthanides?



11. : The lanthanide contraction is due to decrease in



12. : Which of the mentioned is not member of lanthanides?



13. : Which of the following are the elements in which the extra electron enters 5f-orbitals of the (n-2)th main shell?



14. : Which of the mentioned does not belong to actinides?



15. : Which of the mentioned organic solvents is commonly used for separation of actinides?



16. : Which of the mentioned elements shows maximum variable oxidation states among the actinides?



17. : Which of the mentioned elements shows +2 oxidation states among the actinides?



18. : Which of the mentioned elements shows only +4 oxidation state among the actinides?



19. : What is the % of Ye-earths in Xenotime?



20. : What is the location of significant deposits of lanthanides?



21. : Which of the mentioned is not a member of lanthanides?



22. : Which of the mentioned elements shows only +3 oxidation state among the actinides?



23. : Which of the mentioned elements shows color spectra among the actinides?



24. : The decrease in ionic radii of lanthanides in row is due to



25. : Which of the mentioned hydroxides is more basic?



26. : Which of the mentioned elements shows maximum number of different oxidation states in its compounds?



27. : Which of the mentioned statements is false?



28. : An alloy of cerium and iron is known as _________.



29. : Which of the mentioned statements is not true with regard to actinides?



30. : Which of the mentioned minerals is not a member of cerium group of minerals?



31. : Which of the mentioned minerals is not belonging to carbonate group?



32. : Which of the mentioned minerals is not belonging to phosphate group?



33. : Which of the mentioned statements is not true with regard to lanthanides?



34. : Which of the mentioned members of lanthanides has larger ionic radius?



35. : The color of lanthanides is due to



36. : The alloys of lanthanides are known as



37. : Which of the mentioned minerals is not a member of yttrium group of minerals?



38. : Which of the mentioned statements is not true with regard to lanthanides?



39. : Which of the following are the alloys of lanthanides with other metals?



40. : A typical misch metal consists of



41. : The lanthanides are used in



42. : The common oxidation state of lanthanides is



 

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