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Transition and Inner Transition Elements Model Question Paper 1

12th Standard EM

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Chemistry

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 1 = 5
  1. The magnetic moment of Mn2+ ion is

    (a)

    5.92BM

    (b)

    2.80BM

    (c)

    8.95BM

    (d)

    3.90BM

  2. Which of the following compounds is colourless?

    (a)

    Fe3+

    (b)

    Ti4+

    (c)

    Co2+

    (d)

    Ni2+

  3. Which of the following does not give oxygen on heating?

    (a)

    K2Cr2O7

    (b)

    (NH4)2Cr2O7

    (c)

    KClO3

    (d)

    Zn(ClO3)2

  4. The highest possible oxidation state shown by osmium in its compound is

    (a)

    +4

    (b)

    +6

    (c)

    +8

    (d)

    +10

  5. Ce (Z=58) and Yb (Z=70) exhibits stable +4 and +2 oxidation states respectively. This is because

    (a)

    Ce4+ and Yb2+acquire f7 configuration

    (b)

    Ce4+ and Yb2+ acquire f0 configuration

    (c)

    Ce4+ and Yb2+acquire fand f14 configuration

    (d)

    Ce4+and Yb2+ acquire f0 and f14 configuration

  6. 5 x 2 = 10
  7. What are inner transition elements?

  8. What is lanthanide contraction and what are the effects of lanthanide contraction?

  9. What are coinage metals?

  10. Which is the most common oxidation state of lanthanoides?

  11. What happens when KMnO4 is treated with KI?

  12. 5 x 3 = 15
  13. Explain the variation in E0M3+/M2+  3d series.

  14. Compare the ionization enthalpies of first series of the transition elements.

  15. Actinoid contraction is greater from element to element than the lanthanoid contraction, why?

  16. Write chemical equations for the reactions involved in the manufacture of potassium permanganate from pyrolusite ore.

  17. Explain why oxidation states of transition elements increases first from Sc to Mn and then decrease?

  18. 4 x 5 = 20
  19. predict which of the following will be coloured in aqueous solution Ti2+ , V3+ Sc4+, Cu+ ,Sc3+, Fe3+, Ni2+ and Co3+

  20. Transition metals show high melting points why?

  21. Why is there a variation of atomic andionic size as we move from Sc to Zn?

  22. How are materials classified based on their magnetic properties?

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