课程名称︰普通化学甲 课程性质︰必修 课程教师︰佘瑞琳 开课学院：工学院 开课系所︰化工系 考试日期（年月日）︰2011/06/22 考试时限（分钟）：110 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : constants: R=8.314J/mol-K=0.082L-atm/mol-K;F=96500C/mol I.Multiple Choice Questions(30%) 1.Which of the following metals will dissolve in 1.0M HCl solution? (a)Ag (b)Cu (c)Fe (d)Zn 2.If a chemical reaction is carried out in a fuel cell, the maximum amount of useful work that can be obtained is (a)ΔU (b)ΔH (c)ΔS (d)ΔG 3.Which of the following is chelating agent? (a)ethylenediamine (b)ONO- (c)C2O4 2-,oxalate ion (d)CN- 4.Choose the one that is optically active. (a)cis-[CoCl2(en)2]+ (b)[CuCl4]2- (c)[Pt(en)(NH3)2]2+ (d)[Co(en)3]3+ 5.Which of the following exhibits the greatest λmax absorption wavelength in the visible spectrum? The spectrochemical series: Cl-<F-<H2O<NH3<en<NO2<CN- (a)[Fe(CN)6]3- (b)[Fe(NO2)6]3- (c)[Fe(en)3]3+ (d)[FeF6]3- 6.Indicate which of the following compounds you would expect to have color? (a)[Co(NH3)6]Cl3 (b)NiSO4 (c)ScCl3 (d)Zn(OH)2 7.Indicate the molecule that is a Z-configuration. (a)　╲╴╱ 　 ╱￣ 　 Bz (b) ╲╴╱ O╴╱￣╲ ￣╲ OH OH (c) ╴ ╱￣╲ CH3 CH3 (d) HO Cl ╲╴╱ ╴O╱￣╲ 8.To prepare methyl ketone (propanone), one should oxidize (a)2-propanol (b)1-butanol (c)2-butanol (d)tert-butyl alcohol 9.Which of the following is a constituent of a nucleic acid (DNA or RNA) chain? (a)purine base (b)phosphate group (c)glycerol (d)pentose sugar 10.The substance glyceryl trilinoleate (linoleic acid: C17H31COOH) is best discribed as a (a)fat (b)oil (c)wax (d)fatty acid 11.For the biomolecule, protein (a)The building blocks are α-amino acids. (b)Glycine, NH2CH2COOH is the simplest amino acid that optically active. (c)It is polymerized by chain reaction polymerization. (d)The monomers are linked together by peptide bonds. 12.Which of the folloing substances show intermolecular hydrogen bonding? (a)butanone (b)methyl acetate (c)propanol (d)CH3NH2 13.Identify the primary amine. (a)CH3NH2 (b)(CH3)2NH H H H | | | (c) H─C─C─C─H | | | H NH2H (d)(CH3CH2)3NH+ → 14.According to the reaction: CH3CH2ONa + CH3CH2CH2I ← CH3CH2CH2OCH2CH3 + NaI (a)CH3CH2O- is the electrophile. (b)I- is the leaving group. (c)It's prefer to use polar aprotic solvent. (d)This is an SN2 reaction. 15.Which of the following compounds have enantiomers? (a) OH | ╱╲ (b) OH | ╱╲ Cl (c) ╱╲ H2N COOH (d) NH2 | ╱╲ COOH II.Problems(70%) 1.(10%)A galvanic cell is based on the following half-reactions and associated standard reduction potentials at 298K : Al 3+ + 3e- → Al E°=-1.676V Sn 2+ + 2e- → Sn E°=-0.137V (a)Write balanced cell reaction for the electrochemical cell (b)Give the line notation for the cell described. (c)Calculate the cell potential, E°cell, at 25℃ under standard conditions. (d)Calculate the equilibrium constant K for the reaction. (e)What is the value of cell potential when reaction reaches equilibrium? 2.(6%)At 298K a voltaic cell, with Ecell=0.180V, is constructed as follows: Ag(s)∣Ag+(satd Ag3PO4)∥Ag+(0.140M)∣Ag(s) What is the Ksp of Ag3PO4? 3.(6%)Draw plausible structures corresponding to each of the following names. (a)hexaamminechromium(III)hexacyanoferrate(III) (b)tetraamminechloronitrito-N-cobalt(III) iron (c)Sketch a structure to precent fac-[CoCl(ox)(NH3)3], ox is oxalate ion. 4.(10%)For the complex ion [Fe(en)3]3+, ethylenediamine (en) is a strong field ligand. (a)What's the coordination number of central metal ion? (b)What's the geometry of the complex ion? (c)Write the electron configurations of the central metal ion. (d)Draw the crystal-field energy-level diagrams, and show the placement of electrons for the complex. (e)Is the complex diamagnetic or paramagnetic? 5.(8%) (a)Write a condensed structural formula and the line-angle formula for 2,3-dimethylpentane. (b)Construct a Newman projection to show the conformation that is lowest in energy when molecule is viewed along C2-C3 axis. 6.(8%)For the glyceraldehyde with the following dashed and solid wedge line structure. (a)Give the absolute configuration in R,S system. (b)Convert the structure to Sischer projection formula. (c)Indicate the D,L configuration. (d)Draw the mirror image if the given gliceraldehyde. CHO H...| ◢ ╲ HO CH2OH 7.(8%)Glucose molecule exists in straight-chain form (structure A) only to a very small extent. The predominant form is cyclic (structure B) as shown. H O ╲// | H─C─OH CH2OH | |╴╴╴╴O HO─C─H → H ╱| ╲ H | |╱ H ╲| H─C─OH |╲ OH H ╱| | HO ╲| |╱ OH H─C─OH |￣￣￣￣| | H OH CH2OH Structure A structure B Indicate (a)the chiral carbon(s), and (b)the penultimate carbon on structure A. (c)Circle the anomeric carbon on structure B. (d)Is structure B an α-glucose or β-glucose? (e)Is this an aldose or ketose? (f)Is this a D-glucose or L-glucose? (g)Can you distinguish a sugar that is dextrorotatory or levorotatory by absolute configurations? 8.(8%)Nylon 66 is produced by the reaction of 1,6-hexanediamine with hexanedioic acid. (a)Give the structral formula of two monomers. (b)Write the polymerization reaction of Nylon 66. (c)Is this a homopolymer or copolymer? (d)Is this a polyester or polyamide? 9.(6%)Give the structures of the main organic product in the following reaction (a)An SN2 reaction: C2H5 | HO: + H...C ──→ ◢ ╲ CH3 I (b)An E2 reaction: H | (CH3)3COH H3CH2C─C─CH2─Br + (CH3)3CO-Na+ ────→ | H (c)An addition reaction: ╱﹨ CCl4 ║ ﹨╱ + Br2 ───→ ║ ∕╲ ╲∕ --

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