Practice Final Exam 2009

Practice Final Exam 2009 - CHM2046 Final Exam April 29,...

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CHM2046 Final Exam April 29, 2006 IMPORTANT: Bubble in A , B or C as the test form code at the top right of your answer sheet AND also bubble in your Section Number and UFID on the left side of your answer sheet. ΔGº = -RT lnK ΔGº = -nF Eº cell ΔG = ΔGº + RT lnQ E cell = Eº cell - (0.0592/n) log Q pH = pK a + log ([base])/[acid]) F = 9.65 x 10 4 J/V mol e - (or C/mol e - ) R = 8.31 J/K mol Each student received a table of half-cell potentials and a Periodic Table “Help, I need somebody, Help, not just anybody, Help, you know I need someone, HELP!” The Beatles VERSION 0 On this version, the correct answer to each question is a. 1. Which of the following has the most covalent banding? a. PbO 2 b. HgO c. PbO d. Tl 2 O e. Tl 2 O 3 2. Which is the most ionic compound? a. CsCl b. MgCl 2 c. MnCl 2 d. MnCl 3 e. GaCl 3 3. Which group 1 or 2 metal will react with dry oxygen gas to give a compound of formula M 2 O? a. Li b. Na c. Be d. K e. Mg 4. The formulas of selenous and chlorous acids are a. H 2 SeO 3 and HClO 2 b. HSeO 2 and HClO c. H 2 SeO 3 and HClO d. HSeO 3 and HClO 2 e. H 2 SeO 2 and HClO 5. A 3d metal in the +3 oxidation state in an octahedral [ML 6 ] 3+ complex ion has two unpaired electrons when it is low-spin, and four unpaired electrons when it is high-spin. The metal is a. Mn d. Cr b. Co e. Ni c. Fe 6. The condensed configuration of the element Ag is a. [Kr]5s 1 4d 10 b. [Kr]5s 2 4d 9
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c. [Kr]4d 11 d. [Ar]4s 2 3d 9 e. [Xe]5s 2 4d 10 7. How many total isomers of any kind are possible for the octahedral complex [CrCl 4 (NO 2 ) 2 ] 3- ? a. 6 d. 3 b. 2 e. 5 c. 4 8. A metal forms a M 4+ ion with condensed electronic configuration [Kr]4d 4 . The metal is a. Ru d. Mn b. Rh e. Co c. Pd 9. For the elements Ge, In, Sn and Tl, the electronegativities and the metallic character are in the order: a. Ge > Sn > In > Tl and Tl > In > Sn > Ge b. Ge > Sn > In > Tl and Ge > Sn > In > Tl c. Tl > In > Sn > Ge and Tl > In > Sn > Ge d. Tl > In > Sn > Ge and Ge > Sn > In > Tl e. cannot be determined 10. Two compounds of formula [MA 2 B 2 C 2 ], where A, B and C are monodentate ligands, are mirror images of each other but they are not the same molecule. Which of the following statements is true? a. The compounds are optical isomers. b. The compounds are coordination isomers. c. The compounds are linkage isomers. d. The compounds are geometric isomers. e. Since the compounds are mirror images, they are not isomers of any type. 11. The strongest oxidizing agent in Group 17 is a. F 2 d. I 2 b. Cl 2 e. At 2 c. Br 2 12. Which of the following is a metalloid? a. Ge d. P b. Sn e. Bi c. Al 13. The main reason that at room temperature the elements nitrogen and oxygen are gases, whereas phosphorus and sulfur are solids is: a. Nitrogen and oxygen contain multiple bonding and therefore form small molecules, whereas phosphorus and sulfur contain only single bonds and thus form bigger molecules. b.
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Practice Final Exam 2009 - CHM2046 Final Exam April 29,...

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