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12th Standard Chemistry - Coordination Chemistry Model Question Paper Oct-09 , 2019

Coordination Chemistry

12th Standard Chemistry - Coordination Chemistry Model Question Paper

Coordination Chemistry Model Question Paper

12th Standard

    Reg.No. :
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Chemistry

Time : 02:00:00 Hrs
Total Marks : 60
    10 x 1 = 10

  1. The sum of primary valence and secondary valence of the metal M in the complex [M(en)2(Ox)]Cl is________.

    (a)

    3

    (b)

    6

    (c)

    -3

    (d)

    9

  2. An excess of silver nitrate is added to 100ml of a 0.01M solution of Pentaaquachlorochromium (III)chloride. The number of moles of AgCl precipitated would be _______.

    (a)

    0.02

    (b)

    0.002

    (c)

    0.01

    (d)

    0.2

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

    (a)

    potassium trioxalatoaluminium (III)

    (b)

    possium trioxalatoaluminate (II)

    (c)

    potassium trisoxalatoaluminate (III)

    (d)

    potassium trioxalatoaluminate (III)

  4. A magnetic moment of 1.73BM will be shown by one among the following.

    (a)

    TiCl4

    (b)

    [CoCl6]4-

    (c)

    [Cu(NH3)4]2+

    (d)

    [Ni(CN)4]2-

  5. In which of the following coordination entities the magnitude of Δ0 will be maximum?

    (a)

    [Co(CN)6]3-

    (b)

    [Co(C2O4)3]3-

    (c)

    [Co(H2O)6]3+

    (d)

    [Co(NH3)6]3+

  6. Which one of the following will give a pair of enantiomorphs?

    (a)

    [Cr(NH3)6][Co(CN)6]

    (b)

    [Co(en)2Cl2]Cl

    (c)

    [Pt(NH3)4][PtCl4]

    (d)

    [Co(NH3)4Cl2]NO2

  7. How many geometrical isomers are possible for [Pt(Py)(NH3)(Br)(Cl)]?

    (a)

    3

    (b)

    4

    (c)

    0

    (d)

    15

  8. Which kind of isomerism is possible for a complex [Co(NH3)4Br2]CI?

    (a)

    geometrical and ionization

    (b)

    geometrical and optical

    (c)

    optical and ionization

    (d)

    geometrical only

  9. A complex in which the oxidation number of the metal is zero is_______.

    (a)

    K4[Fe(CN)6]

    (b)

    [Fe(CN)3(NH3)3]

    (c)

    [Fe(CO)5]

    (d)

    both (b) and (c)

  10. Fac-mer isomerism is shown by _______.

    (a)

    [CO(en)3]3+

    (b)

    [Co(NH3)4(Cl)2]+

    (c)

    [Co(NH3)3(Cl)3]

    (d)

    [Co(NH3)5Cl]SO4

    11. 5 x 1 = 5

  11. Lead

    12. (1)

    Linear

  12. Tin

    13. (2)

    Stannate

  13. [Ti(H2O)6]3+

    14. (3)

    Octahedral, d2sp3

  14. Sp

    15. (4)

    Photosynthesis

  15. Chlorophyll

    16. (5)

    Plumbate
    6 x 2 = 12

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

  17. [CuCl4]2- exists while [Cul4]2- does not exist why?

  18. Give an example of coordination compound used in medicine and two examples of biologically important coordination compounds.

  19. Draw all possible geometrical isomers of the complex [Co(en)2Cl2]+ and identify the optically active isomer.

  20. [Ti(H2O)6]3+ is coloured, while [Sc(H2O)6]3+ is colourless- explain.

  21. Define coordination number.

    22. 6 x 3 = 18

  22. Give an example for complex of the type [Ma2b2c2] where a, b, c are monodentate ligands and give the possible isomers.

  23. What is linkage isomerism? Explain with an example.

  24. Classify the following ligands based on the number of donor atoms.
    a) NH3
    b) en
    c) ox2-
    d) pyridine

  25. Give the difference between double salts and coordination compounds.

  26. Write the postulates of Werner’s theory.

  27. Why tetrahedral complexes do not exhibit geometrical isomerism.

    28. 3 x 5 = 15

  28. What is crystal field splitting energy?

  29. What is crystal field stabilization energy (CFSE)?

  30. What are the limitations of VB theory?

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