※ [本文转录自 NTU-Exam 看板] 作者: ShawSean (#9 Sean) 看板: NTU-Exam 标题: [试题] 94下 佘瑞琳 普通化学甲下 期中考 时间: Sat Apr 1 11:57:30 2006 课程名称︰普通化学甲下 课程性质︰必修 课程教师︰佘瑞琳 开课系所︰农化、大气、地质 考试时间︰2006.03.31 试题 : C=3.00×10^8m/s;h=6.63×10^-34J/s; Gas constant: R=8.314J/mol.K =0.082L.atm/mol.K I. Multiple Choices (36%) 1.The vibrational energy of molecules often require photons in the region of (a)infrared (b)microwaves (c)radio frequency (d)visible light 2.Which form of electromagnetic radiation has the highest energy? (a)infrared (b)microwaves (c)radio frequency (d)visible light 3.Which of the following orbital designations are incorrect? (a)1p (b)2d (c)6s (d)4f 4.How many electrons in an atom can have the quantum numbers n=3, l=1? (a)3 (b)1 (c)6 (d)2 5.Which of the following combinations of quantum numbers is not allowed? (a)(1,1,1,+1/2) (b)(3,2,0,-1/2) (c)(4,3,-3,+1) (d)(3,1,-1,-1/2) 6.The electron configurations for Fe^2+ is (a)[Ar]4s^2 3d^6 (b)[Ar]4s^0 3d^5 (c)[Ar]4s^2 3d^4 (d)[Ar]4s^0 3d^6 7.Which of the following give a correct trend in size? (a)Al<Si<P<Cl (b)Be<Mg<Ca<Sr (c)I<Br<Cl<F (d)Na^+<MG^2+<Al^3+<Si^4+ 8.Place the elements O, F, and Cl in order of increasing first ionization energy (a)Cl, O, F (b)O, F, Cl (c)F, O, Cl (d)Cl, F, O 9.Which of the following molecules has a dipole moment? (a)CH2Cl2 (b)trans-C2H2F2 (c)SO3 (d)BrF3 10.Which of the following molecules is linear? (a)I3^- (b)CO2 (c)O3 (d)H2S 11.Which of the following has the central atom that is dsp^3 hybridized? (a)SO4^2- (b)SCl4 (c)NH4^+ (d)SF6 12.Which of the following orbital diagrams are possible for a ground-state electron configuration? (a)〔↑↓〕　〔↑↓〕　〔↑　〕〔　↓〕〔↑　〕 1s 2s 2p (b)〔↑↓〕　〔↑↓〕　〔↑　〕〔↑　〕〔　　〕 1s 2s 2p (c)〔↑↓〕　〔↑　〕　〔↑　〕〔↑　〕〔↑　〕 1s 2s 2p (d)〔↑↓〕　〔↑↓〕　〔↑↓〕〔↑　〕〔↑　〕 1s 2s 2p 13.Which quantum number defines the orientation of an orbital? (a)spin (b)magnetic (c)pricipal (d)azimuthal(angular momentum) 14.Which of the following illustration is correct? (a)allotropes: graphite and diamond (b)isotopes: O2 and O3 (c)isoelectronics: Fe^2+ and Cu^2+ (d)noble gas: F2 and Cl2 According to the spectrum, answer the following questions: 15.This is a (a)IR (b)UV-vis (c)H-NMR (d)Mass spectrum. 16.There are (a)one (b)two (c)three (d)four sets of equivalent hydrogens. 17.The molecule might be (a)CH3-O-CH3 (b)CH3CH2OH (c)CH3CH2Cl (d)(CH3)4Si 18.Which of the following is the property of nanodiamond? (a)good thermoconductivity (b)biocompatible (c)transparent (d)composed of carbon atoms II. Problems: (64%) 1.It take 208.4 kJ of energy to remove one mole of electrons from the atoms on the surface of rubidium metal. If rubidium metal is irradiated with 254 nm light, what is the maximum kinetic energy the released electrons can have? (6%, 12.29) 2.Using the following information, write each balanced thermochemical equations, and calculate the lattice enthalpy of AgF(s) (10%) enthalpy of formation of Ag(g) +284 kJ/mol ionization energy of Ag(g) +731 kJ/mol enthalpy of formation of F(g) + 79 kJ/mol enthalpy of formation of AgF(s) -205 kJ/mol electron affinity of F(g) -328 kJ/mol 3.Using the average bond energy in Table 13.6, estimate the enthalpy change for the reaction: HCN(g) + 2H2(g) →CH3NH2(g) (5%, 13.31C) 4.For the molecule SO2, (a)draw the Lewis structures (show any resonance structures), (b)assign the formal charges, (c)specify the orbitals used by the S atom, (d)indicate the bond angles, (e)predict the geometry of the molecule, and (f)is this molecule polar or nonpolar? (13%, p639) 5.Draw the Lewis structure of acetic acid, CH3COOH. (b)Predict the bond angles and the hybride orbitals used by the central atoms: C and O. (c)How many σ and π bonds are there in the molecule? (10%) 6.Draw the Molecular Orbital energy-level diagrams for CO, CO^+, and CO^2+, predict the bond orders, magnetism(paramagnetic or diamagnetic) and the relative bond lengths, bond energies for these three species. Using MO of CO indicate HOMO(Highest Occupied MO) and LUMO(Lowest Unoccupied MO). (20%, 12.35) -- Ana tupa tu, uka mita mahtu sinadan.Asa kata tu malinaskal, aupa aizag a buan. Ana tupa tu, uka mita mahtu kanadan.Asa kata tu malisvala, aupa aizag a bunun. I sia mita tu is-ag, maza mastan kaisal bun. ▁▂▃▅▄▃▁. . Adu aiza sipu-gulun mita,i sa mita tu is-ag. . ● . Mais sadu kata buan, maza mita iliskinan. . . ▂▃▅▆▄▃▂▁ Mailan-tagus nalitia tu sin-hasam. Adu aldikusun nin ta. =Biung-Moonlight= --

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