Coordination Chemistry Model Question Paper

12th Standard EM

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Chemistry

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 1 = 5
  1. An excess of silver nitrate is added to 100ml of a 0.01M solution of pentaaquachloridochromium(III)chloride. The number of moles of AgCl precipitated would be

    (a)

    0.02

    (b)

    0.002

    (c)

    0.01

    (d)

    0.2

  2. A magnetic moment of 1.73BM will be shown by one among the following (NEET)

    (a)

    TiCl4

    (b)

    [CoCl6]4-

    (c)

    [Cu(NH3)4]2+

    (d)

    [Ni(CN)4]2-

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

    (a)

    [Co(CN)6]3-

    (b)

    [Co(C2O4)]3-

    (c)

    [Co(H2O)6]3+

    (d)

    [Co(NH3)6]3+

  4. How many geometrical isomers are possible for<<EVA035.eps>>?

    (a)

    3

    (b)

    4

    (c)

    0

    (d)

    15

  5. 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

  6. 5 x 2 = 10
  7. Arrange the following in order of increasing molar conductivity
    (i) Mg[Cr(NH3)(Cl)5]
    (ii) Cr(NH3)5Cl]3[CoF6]2
    (iii) [Cr(NH3)3Cl3]

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

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

  10. What is the coordination number of central metal ion in [Fe(C2O4)3]3-?

  11. Write the IUPAC name of [Cu(NH3)4]SO4

  12. 5 x 3 = 15
  13. Write the postulates of Werner’s theory

  14. Why tetrahedral complexes do not exhibit geometrical isomerism

  15. What is meant by unidentate, didentate and ambidentate Iigandst Give two examples for each.

  16. What is stability constant?

  17. Draw and explain the structure of Cisplatin.

  18. 4 x 5 = 20
  19. A solution of [Ni(H2O)6]2+ 2is green, whereas a solution of [Ni(CN)4]2- is colorless -Explain

  20. What are the limitations of VB theory?

  21. For the complex [NiCI4]2- write (i) the IUPAC name (ii) The hybridisation type (iii) The shape of the complex

  22. What are the main assumptions of Valence Bond Theory? Explain.

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