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#### Coordination Chemistry Model Question Paper 1

12th Standard EM

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Chemistry

Time : 01:00:00 Hrs
Total Marks : 50
5 x 1 = 5
1. IUPAC name of the complex K3[Al(C2O4)3] is

(a)

potassiumtrioxalatoaluminium(III)

(b)

tassiumtrioxalatoaluminate(II)

(c)

potassiumtrisoxalatoaluminate(III)

(d)

potassiumtrioxalatoaluminate(III)

2. Crystal field stabilization energy for high spin d5 octahedral complex is

(a)

-0.6$\triangle$

(b)

0

(c)

2(P-${ \Delta }_{ 0 }$)

(d)

2(P+${ \Delta }_{ 0 }$)

3. 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]ct and [Co(NH3)4(SCN)2]Cl

(d)

both (b) and (c)

4. 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

5. The spin only magnetic moment of [Mnfsr4]2- is 5.9 BM. Geometry of the complex ion is

(a)

Tetrahedral

(b)

Octahedral

(c)

Square planar

(d)

Pentagonal pyramidal

6. 5 x 2 = 10
7. Ni2+ is identified using alcoholic solution of dimethyl glyoxime. Write the structural formula for the rosy red precipitate of a complex formed in the reaction.

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

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

10. Write the IUPAC name of [Ag(NH3)2]Cl.

11. Give an example for the complexes possessing co-ordination number 8 and 7

12. 5 x 3 = 15
13. What is linkage isomerism? Explain with an example

14. Write the postulates of Werner’s theory

15. Why tetrahedral complexes do not exhibit geometrical isomerism

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

17. Draw and explain the structure of Cisplatin.

18. 4 x 5 = 20
19. On the basis of VB theory explain the nature of bonding in [CoC2O4)3]3-

20. 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]

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

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