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d-Block and f-Block Elements Test - 4

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d-Block and f-Block Elements Test - 4
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following statements is incorrect?
  • Question 2
    1 / -0

    Which among the following is the coinage metal?

    Solution

    Cu, Ag, Au are known as coinage metals. The elements of Group 11 are being called the coinage metals.

  • Question 3
    1 / -0
    Which of the following is not a coinage metal?
  • Question 4
    1 / -0

    4d transition elements series are from

    Solution

    4d series arises from Y (4d1 5s2) to Cd (4d10 5s2)

  • Question 5
    1 / -0
    In which of the following species is manganese in the lowest oxidation state?
  • Question 6
    1 / -0

    The f – block elements are known as

    Solution

    The elements in which the valence electron enters in anti penultimate energy level i.e., (n - 2) f are known as f - block elements.This name is because of the position of the valence electron is in the f - orbital.Since the last electron enters into (n - 2)f - orbital which is inner to the penultimate shell (For d-block elements), they are also called inner transition elements

  • Question 7
    1 / -0
    The highest oxidation state of Cr is
  • Question 8
    1 / -0
    The last element of the third transition series is
  • Question 9
    1 / -0
    Which of the following statements is incorrect?
  • Question 10
    1 / -0
    Which among the following species has a radius greater than that of Fe3+?
  • Question 11
    1 / -0
    Which of the following pairs of elements exhibits the stable configuration of half-filled 4f-orbitals?
  • Question 12
    1 / -0
    Directions: The following question has four choices, out of which ONLY ONE is correct.

    Which of the following compounds is coloured?
  • Question 13
    1 / -0
    Which of the following statements is incorrect?
  • Question 14
    1 / -0
    The species with the largest and smallest radii among the 3d series are respectively
  • Question 15
    1 / -0
    Equivalent weight of KMnO4 in acidic medium is 
  • Question 16
    1 / -0
    Cu+ ion is not stable in aqueous solutions and it invariably exists as Cu2+ in them because
  • Question 17
    1 / -0
    To which of the following categories will the given reaction belong?

    2Cu+ Cu + Cu2+
  • Question 18
    1 / -0
    Which of the following pairs represents good reducing and oxidising agents, respectively?
  • Question 19
    1 / -0

    The inner transition metals of 5f series is known as

    Solution

    Inner transition metals of 5f series is known as Actinoids.

  • Question 20
    1 / -0
    For Cr, the states +2, +3 +4 and +1 are well known, but the most stable state(s) amongst these is/are
  • Question 21
    1 / -0

    Which among the following elements does not belong to first transition series?

    Solution

    Ag belongs to second transition series

  • Question 22
    1 / -0
    The number of unpaired electrons in Mn2+ (25) is
  • Question 23
    1 / -0
    Directions: The following question has four choices, out of which ONLY ONE is correct.

    Potassium permanganate is reduced to Mn2+ in acidic solution.
    MnO4– + 8H+ + 5e– Mn2+ + 4H2O
    In neutral or weakly basic medium, however, it is reduced to Mn (IV) state.
    MnO4– + 2H2O + 3e–  MnO2 + 4OH–
    In acidic medium, Cr2O72- is reduced to Cr3+.
    Cr2O72– + 14H+ + 6e– 2Cr3+ + 7H2O

    100 ml of a 0.1 M solution of a reducing agent whose equivalent weight is equal to its molecular weight in both acidic and alkaline media requires 75 ml of a KMnO4 solution in acidic medium for complete oxidation. What is the molar concentration of the KMnO4 solution if the titration is carried out in alkaline medium?
  • Question 24
    1 / -0
    Transition metal compounds are usually coloured. This is due to the electronic transitions
  • Question 25
    1 / -0
    Compounds of most lanthanoids occur in +3 oxidation state. Which of the following formulae of the compounds of lanthanoids is incorrect?
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