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Coordination Compounds Test - 10
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Coordination Compounds Test - 10

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  • Question 1/10
    1 / -0

    Which of the following statements is not correct?

    Solutions

    [Fe(H2O)6]3+ is an outer orbital complex involving sp3d2 hybridisation.

     

  • Question 2/10
    1 / -0

    Among the following complexes (K-P),

    K - K3[Fe(CN)6]
    L - [Co(NH3)6]Cl3
    M - Na3[Co(oxalate)3]
    N - [Ni(H2O)6]Cl2
    O - K2[Pt(CN)4]
    P - [Zn(H2O)6](NO3)2

    the diamagnetic complexes are

    Solutions

    Following complexes are diamagnetic:
    L : [Co(NH3)6]Cl3 = d2sp3
    M : Na3[Co(oxalate)3] = d2sp3
    O : K2[Pt(CN)4] = dsp2
    P : [Zn(H2O)6](NO3)2 = sp3d2

     

  • Question 3/10
    1 / -0

    Which of the following pairs is incorrectly matched?

    Solutions

    [Fe(H2O)6]2+ has four unpaired electrons.

     

  • Question 4/10
    1 / -0

    The "spin only" magnetic moment (in μB) of Ni2+ in aqueous solution would be (atomic number of Ni = 28)

    Solutions

    Ni2+ in aqueous solution exists as [Ni(H2O)6]2+. It has sp3d2 hybridisation as Ni (II): 3d8s0

     

  • Question 5/10
    1 / -0

    In which of the following octahedral complexes of Co (At. No. 27) will the magnitude of Δ0 be the highest?

    Solutions

    The magnitude of D0 for [Co(CN)6]3- will be the highest as from all the given ligands, CN- is a strong field ligand.

     

  • Question 6/10
    1 / -0

    Crystal field stabilization energy for high spin d4 octahedral complex is

    Solutions

     

  • Question 7/10
    1 / -0

    Out of TiF62-, CoF63-, Cu2Cl2 and NiCl42-, the colourless species are

    Solutions

    TiF62- - Ti : [Ar]3d24s2, Ti4+ : [Ar]3d0
    CoF63- - Co : [Ar]3d74s2, Co3+ : [Ar]3d6
    Cu2Cl2 - Cu : [Ar]3d104s1, Cu+ : [Ar]3d10
    NiCl42- -Ni : [Ar]3d84s2, Ni2+ : [Ar]3d8
    The species having empty d-orbital or completely filled d-orbital are colourless. So, TiF62- and Cu2Cl2 are colourless.

     

  • Question 8/10
    1 / -0

    Which of the following metal carbonyls has the lowest C-O bond order?

    Solutions

    As the electron density on a metal atom increases, more p-back bonding to CO takes place. This further weakens the CO bond by shifting more electron density towards oxygen. Therefore, C-O bond order decreases.

     

  • Question 9/10
    1 / -0

    Which of the following complexes shows maximum stability?

    Solutions

    [Fe(C2O4)3]3- shows maximum stability due to chelation.

     

  • Question 10/10
    1 / -0

    Wilkinson's catalyst used as a homogeneous catalyst in the hydrogenation of alkenes contains

    Solutions

    Wilkinson's catalyst is (Ph3P)3RhCl.

     

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