Final exam version A 2005 12-6-05

Final exam version A 2005 12-6-05 - VERSION A 1. What is...

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1 VERSION A 1. What is the oxidation state of iron in oxyhemoglobin? a) II b) III c) IV d) I e) None of the above 2. Which of the following occurs when deoxyhemoblobin in the T state is converted to oxyhemoglobin in the R state? a) Iron II is converted to iron III and the iron moves from in the plane to out of the plane of the porphyrin ring b) Iron III is converted to iron II and the iron moves from out of the plane to into the same plane as the porphyrin ring. c) Iron III remains iron III and the iron moves from in the plane to out of the plane of the porphyrin ring. d) Iron II remains iron II and the iron moves from out of the plane to into the same plane as the porphyrin ring. e) None of the above. 3. What is the coordination number of iron in oxyhemoglobin? a) Six b) Five c) Four d) Two e) Eight 4. Measurements of the magnetism of [Mn(Cl) 2 (H 2 O) 4 ] 1+ indicate that it is a low spin complex. How many unpaired electron spins are present on Mn in this complex? a) 0 unpaired spins b) 1 unpaired spin c) 2 unpaired spins d) 4 unpaired spins e) none of the above 5. How many electrons with quantum number l = 2 are present in the configuration of Pt in the complex Pt[Cl 6 ] 2- ? a) Six b) Eight c) Four d) Five e) None of the above.
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2 6. How many unpaired electron spins are present in the complex [Ni(CN) 6 ] 4- ? a) Two b) Eight c) Four d) Zero e) None of the above 7. The gemstones ruby and sapphire are both composed of aluminum oxide, but rubies are red while sapphires are blue. The difference in color is due to a) Ruby absorbs red light while sapphire absorbs blue light b) The crystal packing of the aluminum oxide is different in the two and this causes the different colors. c) Small impurities of different transition metal ions cause the different colors. d) Rubies contain the mostly the Al-25 isotope while sapphires contain mostly the Al-27 isotope. e) None of the above 8. The complex [Ni(Cl) 6 ] 4- is green and the complex [Ni(en) 3 ] 2+ is violet. What is the reason for the difference in color of these two complexes? a) Chloride ligands are green and en ligands are violet. b) The different oxidation states of Ni in the two complexes causes the color difference. c) The chloride complex absorbs green light and the en complex absorbs violet light. d) The splitting of the d-orbitals is smaller in the chloride complex than it is in the en complex. e) None of the above. 9. Which of the following energy level diagrams correctly describes the splitting of the d-orbitals of titanium in the complex [Ti(H 2 O) 6 ] 3+ ? d xy d xz d yz d xz d yz d z 2 d z 2 d xz d x 2 - y 2 d xy d z 2 d x 2 - y 2 d xy d x 2 - y 2 d xy d yz d x 2 - y 2 d z 2 d xz d yz Energy Energy Energy Energy (a) (b) (c) (d) (e) None of the above
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3 10. The picture below shows one of the 3d-orbitals in an octahedron. Ligands are located at each of the apices of the octahedron. What is the correct label of this 3d- orbital?
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This note was uploaded on 03/20/2010 for the course CHEM 1C taught by Professor Hooker during the Spring '06 term at UCSB.

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Final exam version A 2005 12-6-05 - VERSION A 1. What is...

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