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Coordination Compounds Test - 7

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Coordination Compounds Test - 7
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Wilkinson's catalyst used as a homogeneous catalyst in the hydrogenation of alkenes contains 
  • Question 2
    1 / -0

    The compounds [Cr(H2O)6]Cl3 and [Cr(H2O)4Cl2]Cl.2H2O exhibit

    Solution

    Hydrate isomers differ by whether water molecules are directly bonded to the central metal atom/ion or are merely present as free water molecules in the crystal lattice. In the first complex the 6 water molecules are directly bonded to the central metal whereas in the second complex 2 water molecules are present as water of crystallisation and 4 water molecules are directly bonded to the central metal. So these exhibit hydrate isomerism.

  • Question 3
    1 / -0
    In the equation 4M + 8CN- + 2H2O + O2 → 4[M(CN)2]- + 4OH-, the metal ion is
  • Question 4
    1 / -0

    The correct IUPAC name of [Fe(C5H​​​​5)2] is

    Solution

    C5H−5 is cyclopentadienyl ligand. Name of ligand is written first followed by the name of the central metal and its oxidation state in paranthesis in roman numerals. C5H5- carries -1 charge and there are two such ligands. The overall charge on the complex is 0 so to balance the -2 charge of the ligands iron must be in +2 oxidation state. Hence, the IUPAC name of the complex is


    Bis(cyclopentandienyl)iron(II)

  • Question 5
    1 / -0
    The "spin only" magnetic moment (in B) of Ni2+ in aqueous solution would be (atomic number of Ni = 28)
  • Question 6
    1 / -0

    Which is used in cancer therapy?

    Solution

    Cis-platin ( cis – [Pt(NH3)2(Cl)2]) is a coordination compounds used in treatment of cancer. It inhibits the growth of tumors.

  • Question 7
    1 / -0
    How many EDTA molecules are required to make an octahedral complex with a Ca2+ ion?
  • Question 8
    1 / -0
    When 0.1 mol of CoCl3(NH3)5 is treated with excess of AgNO3, 0.2 mol of AgCl is obtained. The conductivity of the solution will correspond to
  • Question 9
    1 / -0
    Out of TiF62-, CoF63-, Cu2Cl2 and NiCl42-, the colourless species are
  • Question 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
  • Question 11
    1 / -0
    Crystal field stabilization energy for high spin d4 octahedral complex is
  • Question 12
    1 / -0
    Which of the following pairs of 'coordination compound - IUPAC name' are correct?

    a. [CoCl(NH3)5]CO3 - chloropentaammine cobalt (III) carbonate
    b. K2[Zn(OH)4] - potassium tetrahydroxozincate (II)
    c. [Pt(py)4][PtCl4] - tetrapyridineplatinum (II) tetrachloroplatinate (II)
    d. K4[Ni(CN)4] - potassium tetracyanonickel (0)
  • Question 13
    1 / -0
    Both Co3+ and Pt4+ have coordination number as six. Which of the following pairs of complexes will show approximately the same electrical conductance for their 0.001 M aqueous solutions?
  • Question 14
    1 / -0
    Which of the following statements is not correct?
  • Question 15
    1 / -0
    [Co(NH3)4(NO2)2]Cl exhibits
  • Question 16
    1 / -0
    Which of the following pairs is incorrectly matched?
  • Question 17
    1 / -0
    In which of the following octahedral complexes of Co (At. No. 27) will the magnitude of 0 be the highest?
  • Question 18
    1 / -0
    Which of the following complexes shows maximum stability?
  • Question 19
    1 / -0

    The metal-carbon bond in metal carbonyls possess

    Solution

    The metal-carbon bond in metal carbonyls possess both σ and π character. The M–C σ bond is formed by the donation of lone pair of electrons on the carbonyl carbon into a vacant orbital of the metal. The M–C π bond is formed by the donation of a pair of electrons from a filled d orbital of metal into the vacant antibonding π* orbital of carbon monoxide. The metal to ligand bonding creates a synergic effect which strengthens the bond between CO and the metal.

  • Question 20
    1 / -0
    Which of the following has square planar structure?
  • Question 21
    1 / -0

    What is used as the complexing agent in volumetric analysis of ions like Mg2+and Ca2+?

    Solution

    EDTA (ethylenediaminetetraacetato) is a hexadentate ligand and it forms stable chelate complex with given metal ions. The selective estimation of these ions can be done due to differensce in stability constants of complexes of these ions with EDTA.

  • Question 22
    1 / -0
    Facial and meridional isomerism will be exhibited by
  • Question 23
    1 / -0
    [CoBr(NH3)5]SO4 and [CoSO4(NH3)5]Br are
  • Question 24
    1 / -0
    Match the compounds given in Column I with the oxidation state of cobalt present in them (given in Column II) and choose the correct answer.

    Column I (Compound) Column II (Oxidation state of Co)
    A. [Co(NCS)(NH3)5](SO3) 1. +4
    B. [Co(NH3)4Cl2]SO4 2. 0
    C. Na4[Co(S2O3)3] 3. +1
    D. [Co2(CO)8] 4. +2
      5. +3
  • Question 25
    1 / -0
    Which of the following metal carbonyls has the lowest C-O bond order?
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