CO-ORDINATION CHEMISTRY-IMP QUESTION

 CORDINATION CHEMISTRY; SOME IMPORTANT QUESTION

     XII-BOARD 2013 

                                                                                      MM=35

                                                                             TIME =60 MIN

  Question = 1 -6 (1-marks),,7-17(2-marks),,18-20 (3-marks)

Q1. Write the formula for the following coordination compound:

Tetraamineaquachloridocobalt (III) chloride

Q2. Why is geometrical isomerism not possible in tetrahedral complexes having two different types of unidentate ligands coordinated with the central metal ion?

Q3. Write the IUPAC name of the following coordination compound:

[CoCl2 (en) 2]Cl.

Q4. The spin only magnetic moment of [MnBr4] ^2- is 5.9 BM. Predict the geometry of the Complex ion?

Q5. Out of the following two coordination entities which is chiral (optically active)?

(a)  cis‐[CrCl2 (ox)2]^3-

(b) trans‐[CrCl2 (ox)2]^3-

Q6. [NiCl4] ^2- is paramagnetic while [Ni (CO) ₄] is diamagnetic though both are tetrahedral. Why?

Q7. Draw structures of geometrical isomers of [Fe (NH3 )₂(CN)4]^-

Q8. Indicate the type of isomerism exhibited by the following complex and draw the Structures for these isomers:[Co(en)₃]Cl3

Q7. Draw structures of geometrical isomers of [Fe (NH3 )₂(CN)₄]

Q9. Give evidence that [Co (NH3)₅Cl] so ₄ and [Co(NH₃)₄ SO ₄]Cl are ionization isomers.?

Q10. Calculate the overall complex dissociation equilibrium constant for the [Cu(NH3)4] ²⁺ ion, given that β4 for this complex is 2.1 × 10 ¹³  .?

Q11. What is meant by unidentate ligand? Give two examples.

Q12. What is meant by didentate ligand? Give two examples.

Q13. What is meant by ambidentate ligands? Give two examples.

Q14. Draw the structures of optical isomers of:

[Cr(C2O4)3] ^3-

Q15;. Discuss the nature of bonding in metal carbonyls.

Q16. What is meant by the chelate effect? Give an example?

Q17. Draw the structures of:

(i)                Ni (CO) ₄ (ii) Fe (CO) ₅

Q18. Discuss the nature of bonding in the following coordination entities on the

Basis of valence bond theory:

(i)[Fe (CN)₆]^4- (ii) [FeF₆] ^3-(iii) [Co(C2O4)₃]^3-

Also predict their magnetic behavior.

Q19. What is crystal field splitting energy? Draw figure to show the splitting of d orbital’s in an octahedral crystal field. How does the magnitude of Δo decide the actual configuration of d orbital’s in a coordination entity?

Q20. Discuss briefly giving an example in each case the role of coordination

Compounds in:

(i)                Biological systems (iii) Analytical chemistry

                                BY-DR SUDHIR TOMAR