COORDINATION CHEMISTRY: A SKILL BASED TEST

TEST PAPER NO. 09 TOPIC : COORDINATION CHEMISTRY M.M. 50 TIME: 3 HRS. Name of Student________________________________ Roll No. _______________ Q.NO. 1-10 carries 1 mark, 11-20 2 marks, 21-25 carries 3 marks, 26 carries 5 marks. 1. Write the formulae of compound: Tetraamineaquachloridocoalt(III) chloride 2. Write the IUPAC name of K3[Cr(C2O4)3] 3. Why geometrical isomerism is not possible for tetrahedra complexes having two different types of unidentate ligands coordinated with the central metal atom? 4. Indicate the type of isomerism exhibited by [Co(en)3]Cl3 5. The spin only moment of [MnBr4]-2 is 5.9 BM. Predict the geometry of the complex ion? 6. Calculate the overall complex dissociaation equilibrium constant for the [Cu(NH3)4]2+ ion, given 4 for this complex is 2.1 x 1013 7. Draw the stuctures of optical isomers of: [Cr(C2O4)3]-3 ? 8. A solution of [Ni(H2O)6]2+ is green but a solution of [Ni(CN)4]-2 is colourless? 9. What is meant by chelate effect give one example? 10. How many ions are produced from complex [Co(NH3)6]Cl2 in a solution? 11. List various types of isomerism possible for coordination compounds, giving an example of each type? 12. Discuss the nature of bonding in metal carbonyls? 13. What is spectrochemical series? Explain the difference b/w a weak and strong field ligand with example? 14. Draw figure to show the splitting of d orbitals in an octahedral crystal field? 15 What is meant by the the stabillity of a cooordination compound in solution? State the factors which govern the stability of complexes? 16 Explain the bonding in the coordination compounds in terms of Werner’s postulate? 17. What is meant by unidentate, didentate and ambidentate ligands? 2 ex of each. 18. Give the application of coordination compound in field of biological science? 19. Give the application of coordination compound : a. Extraction or Metallurgy b. Photography 20. Explain the : a. [Cr(NH3)6]3+ is paramagnetic while [Ni(CN)4]-2 is diamagnatic. b. [Fe(CN)6]-4 and [Fe(H2O)6]+3 are different colours in dilute solution. 21. Write shor not on: a. Coordination number b. Ligand c. Homoleptic and heteroleptic 22. Explain Crystal field theory in reference to : octahedral and tetrahedral complex. 23. Explain [Ni(CN)4]-2 : under following heads: a. Nomenclature b. Hybridization c. Magnetic moment 24 Write the formulae and name of complex formed during qualatitive test: a. Ring test of Nitrate b. Prussian Blue colour in test of Ferric c. EDTA Ligand 25 Give the oxidation state, d orbital occupation and coordination number of the central metal ion in the following complex: a. K3[Co(C2O4)3] b. (NH4)2[CoF4] c. cis-[Cr(en)2Cl2]Cl 26 a. Explain on the basis of vlaence bond theory that [Ni(CN)4]-2 ion with square planar structure is diamagnetic and the [Ni(Cl)4]-2 ion with tetrahedra geometry is paramagnetic. b. [Ni(Cl)4]-2 is paramagnetic while [Ni(CO)4] is diamagnetic though both are tetrahedral. [Fe(H2O)6]3+ is strongly paramagnetic whereas [Fe(CN)6]-3 is weakly paramagnetic. [Co(NH3)6]3+ is an inner orbital complex whereas [Ni(NH3)6]2+ is an outer orbital complex. Hexaquo manganese (II) ion contains five unpaired electrons, while the hexacyanoion contains only one unpaired electron.