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JEE Main Chemistry · d- and f-Block Elements · Set 13 (Q361-390)

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  1. 361.
    The electronic configurations of bivalent europium and trivalent cerium are respectively :
    (atomic number : Xe = 54, Ce = 58, Eu = 63)
    1. (1)[Xe] and [Xe]
    2. (2)[Xe] and [Xe]
    3. (3)[Xe] and [Xe]
    4. (4)[Xe] and [Xe]
  2. 362.
    Which element is not present in Nessler's reagent ?
    1. (1)Mercury
    2. (2)Potassium
    3. (3)Iodine
    4. (4)Oxygen
  3. 363.
    Which of the following processes does not involve oxidation of iron ?
    1. (1)Decolourization of blue CuSO4 solution by iron
    2. (2)Formation of Fe (CO)5 from Fe
    3. (3)Liberation of H2 from steam by iron at high temperature
    4. (4)Rusting of iron sheets
  4. 364.
    Match the following:

    The correct match is Codes:

    A
    B
    C
    1. (1)1
      3
      6
    2. (2)1
      5
      2
    3. (3)4
      5
      2
    4. (4)4
      3
      6
  5. 365.
    Because of lanthanoid contraction, which of the following pairs of elements have nearly same atomic radii?. (Numbers in the parenthesis are atomic numbers)
    1. (1)and
    2. (2)and
    3. (3)andZr(40)
    4. (4)Zr(40)and
  6. 366.
    The electron of an element X with an atomic number of 71 enters into the orbital:
    1. (1)6s
    2. (2)5d
    3. (3)4f
    4. (4)6p
  7. 367.
    The incorrect statement is:
    1. (1)Manganate and permanganate ions are paramagnetic
    2. (2)Manganate and permanganate ions are tetrahedral
    3. (3)Manganateion is green in colourand permanganate ion in purple in colour
    4. (4)In Manganate and permanganate, the – bonding takes place by overlap of p-orbitals of oxygen and d-orbitals of manganese.
  8. 368.
    Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature ? (Given for Nd = 60,Yb = 70, La = 57,Ce = 58)
    1. (1)Nd
    2. (2)Yb
    3. (3)La
    4. (4)Ce
  9. 369.
    The ion is a strong reducing agent in spite of its ground state electronic configuration (outermost): [Atomic number of Eu = 63]
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  10. 370.
    The highest possible oxidation states of uranium and plutonium, respectively, are :
    1. (1)6 and 7
    2. (2)6 and 4
    3. (3)7 and 6
    4. (4)4 and 6
  11. 371.
    The statement that is incorrect about the interstitial compounds is:
    1. (1)They are chemically reactive
    2. (2)They are very hard
    3. (3)They have metallic conductivity
    4. (4)They have high melting points
  12. 372.
    Mischmetal is an alloy consisting mainly of:
    1. (1)lanthanoid and actinoid metals
    2. (2)actinoid and transition metals
    3. (3)lanthanoid metals
    4. (4)actinoid metals
  13. 373.
    is reduced to by using
    1. (1) in presence of NaOH
    2. (2) in water
    3. (3) in presence of
    4. (4) in presence of
  14. 374.
    The electronic configuration of gadolinium (Atomic No. ) is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  15. 375.
    The transition elements have a general electronic configuration
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  16. 376.
    The d-electron configurations of Cr2+, Mn2+, Fe2+ and Co2+ are d4, d5, d6 and d7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour ?
    1. (1)[Mn(H2O)6]2+
    2. (2)[Fe(H2O)6]2+
    3. (3)[Co(H2O)6]2+
    4. (4)[Cr(H2O)6]2+
  17. 377.
    Among the following, which is the strongest oxidizing agent ?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  18. 378.
    Which one of the following nitrates will leaves behind a metal on strong heating ?
    1. (1)Copper nitrate
    2. (2)Manganese nitrate
    3. (3)Silver nitrate
    4. (4)Ferric nitrate
  19. 379.
    when treated with gives green colour solution of . The two solutions are separated as shown below :
    [SPM : Semi Permeable Membrane]

    Due to osmosis :
    1. (1)Molarity of solution is lowered.
    2. (2)Molarity of solution is lowered.
    3. (3)Green colour formation observed on side Y.
    4. (4)Green colour formation observed on side X.
  20. 380.
    What would happen when a solution of potassium chromate is treated with an excess of dilute ?
    1. (1)O and O are formed
    2. (2)CrO is reduced to +3 state of Cr
    3. (3)CrO is oxidised to +7 state of Cr
    4. (4) and O are formed
  21. 381.
    Which one of the following statements is correct when is passed through acidified solution?
    1. (1)is reduced.
    2. (2)Green is formed.
    3. (3)The solution turns blue.
    4. (4)The solution is decolourised.
  22. 382.
    In which of the following compounds transition metal has zero oxidation state?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  23. 383.
    Four successive members of the first series ofthe transition metals are listed below. For which one of them the standard potential value has a positive sign?.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  24. 384.
    In neutral or faintly alkaline medium, being a powerful oxidant can oxidize, thiosulphate almost quantitatively, to sulphate. In this reaction overall change in oxidation state of manganese will be :
    1. (1)5
    2. (2)1
    3. (3)0
    4. (4)3
  25. 385.
    In the structure of the dichromate ion, there is a :
    1. (1)linear symmetrical Cr − O – Cr bond.
    2. (2)non-linear symmetrical Cr − O – Cr bond.
    3. (3)linear unsymmetrical Cr − O – Cr bond.
    4. (4)non-linear unsymmetrical Cr − O – Cr bond.
  26. 386.
    Which of the following statements is false ?
    1. (1) is less soluble than
    2. (2) is primary standard in volumetry
    3. (3) is tetrahedral in shape
    4. (4) has a Cr–O–Cr bond
  27. 387.
    The correct order of atomic radii is:
    1. (1)N>Ce>Eu>Ho
    2. (2)Ho>N>Eu>Ce
    3. (3)Ce>Eu>Ho>N
    4. (4)Eu>Ce>Ho>N
  28. 388.
    Dihydrogen reacts with CuO to give
    1. (1)
    2. (2)Cu
    3. (3)O
    4. (4)Cu
  29. 389.
    Which is least stable in aqueous medium
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  30. 390.
    An acidified manganate solution undergoes disproportionation reaction. The spin-only magnetic moment value of the product having manganese in higher oxidation state is_________B.M. (Nearest integer)