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Set 14 of 14 · Questions 391-399 of 399

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NEET Chemistry · d- and f-Block Elements · Set 14 (Q391-399)

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  1. 391.
    The set having ions which are coloured and paramagnetic both is -
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  2. 392.
    In neutral or alkaline solution, oxidises thiosulphate to:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  3. 393.
    The ionic charges of manganate and permanganate ion are respectively
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  4. 394.
    The total number of Mn = O bonds in is ______
    1. (1)4
    2. (2)5
    3. (3)6
    4. (4)3
  5. 395.
    In alkaline medium. oxidises to
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  6. 396.
    Which of the following pair is not isoelectronic species?
    (At. no. Sm, 62; Er, 68: Yb, 70: Lu, 71; Eu, 63: Tb, 65; Tm, 69)
    1. (1) and
    2. (2) and
    3. (3) and
    4. (4) and
  7. 397.
    Which transition metal oxide among the following has electrical conductivity similar to that of copper?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  8. 398.
    The correct statement is
    1. (1)the earlier members of lanthanoid series resemble calcium in their chemical properties
    2. (2)the extent of actinoid contraction is almost the same as lanthanoid contraction
    3. (3)in general, lanthanoids and actinoids do not show variable oxidation states
    4. (4) in aqueous solution is not known.
  9. 399.
    Which of the statements is not true?
    1. (1)On passing through acidified solution, a milky colour is observed.
    2. (2)is preferred over in volumetric analysis.
    3. (3)solution in acidic medium is orange.
    4. (4)solution becomes yellow on increasing the beyond 7.