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Coordination Chemistry

12th Chemistry - Coordination Chemistry Model Question Paper

Coordination Chemistry Model Question Paper

12th Standard

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Chemistry

Time : 01:00:00 Hrs
Total Marks : 40
    5 x 1 = 5

  1. IUPAC name of the complex K3[Al(C2O4)3] is _______.

    (a)

    potassiumtrioxalatoaluminium(III)

    (b)

    possiumtrioxalatoaluminate(II)

    (c)

    potassiumtrisoxalatoaluminate(III)

    (d)

    potassiumtrioxalatoaluminate(III)

  2. Which one of the following pairs represents linkage isomers?

    (a)

    [Cu(NH3)4][PtCl4] and [Pt(NH3)4][CuCl4]

    (b)

    [Co(NH3)5(NO3)]SO4 and [Co(NH3)5(ONO)]

    (c)

    [Co(NH3)4(NCS)2]Cl and [Co(NH3)4(SCN)2]Cl

    (d)

    both (b) and (c)

  3. Structural formula of tetra aquadichlorideo Chromium (III) chloride _______.

    (a)

    [Cr(H2O)4Cl2]Cl2

    (b)

    [Cr(H2O)4Cl3]

    (c)

    [(H2O)4Cl2Cr]Cl2

    (d)

    [Cl2(H2O)4Cr]Cl3

  4. IUPAC name of H2[Ptcl6] is _______.

    (a)

    Hexa chloridoplatinum (IV) acid

    (b)

    Hexa chloridoplatinum (IV) acid

    (c)

    Hexachloridoplatinic (IV) acid

    (d)

    Dihydrogenhexaehloro platinate (IV)

  5. Predict the geometry and hybridisation of Fe(Co)5 _______.

    (a)

    Trigonal planar, dsp3

    (b)

    Trigonal bipyramidal, dsp3

    (c)

    Square planar dsp2

    (d)

    Octahedral d2sp3

    6. 1 x 1 = 1

  6. Which among the following statement is correct?
    a) Magnitude of crystal field splitting energy depends only on ligand field.
    b) Lower CFSE favour formation of low spin complex.
    c) t2g orbitals are three fold degenerate while eg orbitals and two fold degenerate
    d) all the above

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    c) t2g orbitals are three fold degenerate while eg orbitals and two fold degenerate

    7. 2 x 2 = 4

  7. Assertion: Tetrahedral complexes do not show geometrical isomerism.
    Reason: The relative position of the ligands attached to the central metal atom is same with respect to each other.
    Codes:
    a) Both assertion and reason are true and the reason is the correct explanation of the assertion.
    b) Both the assertion and reason are true but the reason is not the correct explanation of the assertion.
    c) Assertion is true but reason is false.
    d) Both assertion and reason are false.

  8. Assertion: EDTA is used remove lead poisoning.
    Reason: EDTA is a chelating ligand.
    Codes:
    a) Both assertion and reason are true and the reason is the correct explanation of the assertion.
    b) Both the assertion and reason are true but the reason is not the correct explanation of the assertion.
    c) Assertion is true but reason is false.
    d) Both assertion and reason are false.

    9. 1 x 2 = 2

  9. The crystal field splitting power of various ligands for a given metal ion are in the following order.
    a) I- < Br- < Cl- < SCN- < S2- < F < OH-
    b) I- < Br- < SCN- < Cl- < S2- < F < OH-
    c) Br- < I- < SCN- < S2- < Cl- < F < OH-
    d) Br- < I- < SCN- < S2 < Cl- < OH- < F

    10. 2 x 2 = 4

  10. Write the formula for the co-ordination compounds. 

  11. Write the IUPAC name of the complex.

    12. 3 x 3 = 9

  12. Why tetrahedral complexes do not exhibit geometrical isomerism.

  13. Draw the structure of the following homoleptic metal carbonyl.
    (i) [Ni(CO)4]
    (ii) [Fe(CO)5]
    (iii) [Cr(CO)6]

  14. Mohr's salt answers the presence of Fe2+, NH4+and SO42- ions, whereas the potassium ferrithiocyanate will not answer Fe3+ and SCN ions give reason.

    15. 3 x 5 = 15

  15. Discuss briefly the nature of bonding in metal carbonyls.

  16. Write the oxidation state, coordination number , nature of ligand, magnetic property and electronic configuration in octahedral crystal field for the complex K4[Mn(CN)6]

  17. How are metal carbonyls classified depending on the number of metal atoms?

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