March 06, 2015

ONLINE TEST - f - Block Elements - EM

This Quiz is a Simple test for +2 Science group students which contain Questions asked from March - 2006 to March - 2017 in f - Block Elements. Just participate in it and test your skill.

  1. The oxide used in gas lamp material is
  2. MnO2
    CeO2
    N2O5
    Fe2O3

  3. Elements that form oxocations are
  4. Lanthanides
    Actinides
    Noble gases
    Alkali / base metals

  5. __________ is the oxidation state of U in UF6
  6. + 6
    + 4
    + 3
    0

  7. According to Fajan’s rule, decrease in size of Ln3+ ion in Ln(OH)3
  8. increases the covalent character
    decreases the covalent character
    increases the basic character
    increases the ionic character

  9. Alloys of Lanthanides are called as
  10. Misch metals
    Metalloids
    Plate metal
    None of these

  11. Among the Lanthanides, with the increase in atomic number the tendency to act as reducing agent
  12. increases
    decreases
    no change
    none of these

  13. Ceria / CeO2 is used in
  14. toys
    tracer bullets
    gas lamp material
    none of these

  15. Lanthanide contraction is due to
  16. perfect shielding of 3d electron
    imperfect shielding of 3d electron
    perfect shielding of 4f electron
    imperfect shielding of 4f electron

  17. Maximum oxidation state exhibited by Lanthanides is
  18. + 3
    + 4
    + 6
    + 7

  19. The (most) common oxidation state of lanthanides is
  20. + 2
    + 3
    + 4
    + 6

  21. The elements in which extra electron enter (n – 2) f orbital are
  22. s - block elements
    p - block elements
    d - block elements
    f - block elements

  23. The fuel used in nuclear power plant is
  24. Copper
    Lead
    Uranium
    Radium

  25. Which isotope is used as a power source in long mission space probes is?
  26. U–235
    Pu–235
    Pu–238
    U–238

  27. The radioactive element of lanthanide is
  28. Cerium
    Promethium
    Gadolinium
    Lutetium

  29. ThO2 / Thoria is used in
  30. toys
    tracer bullets
    gas lamp material
    dyeing cotton

  31. Which is used in Gas lamp materials?
  32. Ceria
    Thoria
    Mish metal
    Both (a) & (b)

  33. Lanthanides are extracted from
  34. Limonite
    Monazite
    Magnetite
    Cassiterite

  35. Lanthanides are separated by
  36. Fractional distillation
    Steam distillation
    Fractional Crystallisation
    Sublimation

  37. Metallothermic processes involving Lanthanides are called as
  38. Aluminothermic process
    Lanthanido-thermic process
    Reduction process
    Oxidation process

  39. The electronic configuration of Lanthanides is
  40. [Xe]4f0 5d0 6s0
    [Xe] 4f1–7 5d1 6s1
    [Xe]4f1–14 5d1 6s2
    [Xe]4f1–14 5d1–10 6s2

  41. The electronic configuration of Actinides is
  42. [Rn]5f0–14 6d0 7s0
    [Rn]5f0–14 6d0–2 7s0
    [Rn]5f0–14 6d0–2 7s1
    [Rn]5f0–14 6d0–2 7s2

  43. The lanthanide contraction is responsible for the fact that
  44. Zn and Y have about the same radius
    Zr and Nb have similar oxidation state
    Zr and Hf have about the same radius
    Zr and Zn have the same oxidation state

  45. Which of the following is a radioactive lanthanide
  46. Pu
    Ac
    Th
    Pm

  47. The long mission space probes use as power source____________
  48. Pu
    Pm
    Th
    U

  49. The most common oxidation state of actinide is
  50. + 2
    + 1
    + 3
    + 4

  51. Which of the following lanthanides have no partly filled 4f sub-shell but have electrons in 5d
  52. Ce
    Lu
    Pm
    Nd

  53. The oxidation state of Uranium in UO2Cl2 is
  54. + 2
    + 4
    + 5
    + 6

  55. Important ore of lanthanides is :
  56. Pitch blende
    Monozite
    Gypsum
    Chormite

  57. Actinide contraction is due to
  58. perfect shielding of 5f electron
    imperfect shielding of 4f electron
    imperfect shielding of 5f electron
    perfect shielding of 4f electron

  59. __________ is used in cigarette lighters
  60. Mish metal
    CeO2
    Mg- alloys
    pyrophoric alloy

  61. The major constituents of Mish metals are
  62. Ce, Nd, Th
    Th, Ac, Ce
    Ce, La, Nd
    Ce, Lr, U

  63. ________________ element is used as fuel in nuclear power plant.
  64. U-236
    Pu-238
    U-235
    Pu-235

  65. Which Mg alloy is used in making parts of jet engines?
  66. 3% Mishmetal and 0.1% Zr
    30% Mishmetal and 1% Zr
    30% Mishmetal and 0.1% Zr
    3% Mishmetal and 1% Zr

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