※ [本文转录自 NTU-Exam 看板] 作者: sa033766 (乡长) 看板: NTU-Exam 标题: [试题] 94上 杨美惠 普通化学期末考 时间: Wed Jan 18 02:27:49 2006 课程名称︰普通化学丙 课程性质︰系定必修 课程教师︰杨美惠 开课系所︰兽医 植微 考试时间︰95.1.13 试题 : 一.Multuple Choice Questions (62%) 1.Which statement is incorrect? (A)Decreasing the external pressure decreases the boiling point of a liquid. (B)The normal bouling point is the temperature at which the vapor pressure equals 1 atm (C)The density of a liquid decreases with increasing temperature, while that of vapor increases. (D)Even above the critical temperature, increasing the pressure on a gas should make it liquefy. (E)A supercritical fluid exists at temperatures above Tc and pressures above Pc. 2.Which of the following liquids has the greatest viscocity? (A)hexane (B)CH3OCH2CH2CH3 (C)CH3CH2OCH2CH3 (D)CH3CH2OH (E)HOCH2CH2OH 3.A metal that crystallizes in the body-centered cubic (bcc) structure has a crystal coordination number of (A)4 (B)6 (C)8 (D)10 (E)12 4.Which of the following is true of a unit cell of an ionic crystal? (A)It is the same as the formula unit. (B)It is any portion of the ionic crystal that has a cubic shape. (C)It shares a portion of its ions with other unit cells. (D)It always contains the same number of cations and anions. 5. ︿ Reaction Rate│-------------╭─────── │ ╱ │ ╱ │ ／ │ ／ │ ／ │ ／ │／ └───────────────> Substrate Concentration Consider the plot shown above of reaction rate versus substrate concentration for an enzyme. Why does the curve become flat with large substrate concentration? (A)Large substrate concentrations saturate all of the active sites on the enzyme molecules. (B)Large amounts of substrate change the acidity of the reaction medium thus slowing the activity of the enzyme. (C)Large substrate concontrations reduce the number of enzyme-substrate (ES) complexes being formed. (D)LeChatlier's Principle doesn't apply to enzyme kinetics. (E)Additions of large amounts of substrate change the effective temperature and thus the rate of the reaction changes. 6.In the reaction 2A + B -> 2C + D , -△[A]/△t is found to be 5.0 M．min^-1. What is the rate of reaction of B ? (A)2.5 (B)5.0 (C)10 (D)75 (E)Additional information is required. 7.Which statement is incorrect? (A)The half-lifeof a zero order reaction is directly proportional to the initial concentration(i.e, the greater the concentration the longer the half-life) (B)The half-life of a first order reaction is directly proportional to the initial concentration. (C)The half-life of a second order reaction is inversely proportional to the initial concentration. (D)The half-life of a first order reaction is independent of the initial concentration. (E)The shorter the half-life, the faster is the reaction. 8.According to the collision theory of kinetics, which statement best describes the rate of a chemical reaction? (A)All collisions result in a chemical reaction. (B)All collisions between molecules with at least a minimum kinetic energy result in reaction. (C)All collisions between molecules with at least a minimum kinetic energy and the proper orientation result in reaction. (D)The greater the difference in energy between the reactants and products, the faster is the reaction. (E)The greater the difference in energy between the reactaants and the transition state, the faster is the reaction. 9.Consider the following 2-step mechanism. Which of the species in the mechanism is the intermediate? H2O2 + I¯ ==> H2O + OI¯ fast step H2O2 + OI¯==> H2O + O2 + I¯ slow step ─────────────────────── 2H2O2 ==> 2H2O+ O2 net reaction (A)H2O2 (B)H2O (C)I¯ (D)OI¯ (E)O2 10.The value of Kc is changed when (A)the concentration of reactants are changed. (B)the volume of the system is changed. (C)the pressure of the system is changed. (D)the temperature of the system is changed. (E)a catalyst is added. 11.For the gaseous system, 2H2S + 3O2 <==> 2H2O + SO2, how is Kp related to Kc at a given temperature? (A)less than (B)equal to (C)greater than (D)unrelated to 12.Which change will increase the quantity of product in the following reaction? (A)an increase in temperature (B)a decrease in volume of container (C)a decrease in pressure (D)adding a catalyst (E)increasing P by adding some argon 13.Which of the following is not a spontaneous process at room temperature? (A)the reaction of N2(g) and O2(g) to form NO(g) (components of air) (B)H2O(s) ==> H2O(l) at 10。C. (C)CH4(g) + 2O2(g) ==> CO2(g) + 2H2O(l) (combustion of natural gas) (D)4Fe(s) + 3O2(g) ==> 2Fe2O3(s) (formation of rust) (E)CaO(s) + CO2(g) ==> CaCO3(s), Kp = 7.1×10^22 14.Which of the following statements correctly identifies the Second Law of Thermodynamics? (A)All spontaneous processes increase the entropy of the universe. (B)The enthalpy of a pure substance at 0K is zero. (C)The total entropy of the universe is the sum of the entropy of the system and the surroundings. (D)The free energy of a reaction at equilibrium is zero. (E)The reverse of a spontaneous reaction is a nonspontaneous process. 15.Which of the following is most dependent on temperature? (A)△H。 (B)△S。 (C)△G。 (D)None of the above depends on temperature. 16.Predict the signs of △S。,△H。 and △G。 for the following process at 25。C 2NH3(g) ==> N2(g) + 3H2(g) △S。 △H。 △G。 (A) + + - (B) - + - (C) + - + (D) - - - (E) + + + 17. Table 18.1 Selected Standard Electrode Potential at 25。C Reaction E。,V Mg2+(aq) + 2e¯ ==> Mg(s) -2.356 Fe2+(aq) + 2e¯ ==> Fe(s) -0.440 Pb2+(aq) + 2e¯ ==> Pb(s) -0.125 2H+(aq) + 2e¯ ==> H2(g) 0.0 Cu2+(aq) + 2e¯ ==> Cu(s) +0.337 I2(s) + 2e¯ ==> 2I¯(s) +0.535 Fe3+(aq) + e¯ ==> Fe2+(aq) +0.771 Ag+(aq) + e¯ ==> Ag(s) +0.800 O2(g) + 4H+(aq) + 2e¯ ==> 2H2O +1.229 Cl2(g) + 2e¯ ==> 2Cl¯(aq) +1.358 F2(g) + 2e¯ ==> 2F¯(aq) +2.866 (Refer to Table 18.1)Which is the best oxidizing agent? (A)F¯ (B)Mg2+ (C)Fe3+ (D)Cu2+ (E)Cl2 18.Consuder a cell made up of two half cells consisting of the same metal in solutions of the metal ion of different concentrations. Which statement is incorrect? (A)The E。cell is zero. (B)The cell containing more concentrated electrolyte is the anode. (C)The spontaneous reaction will proceed until the concentrations become equal. (D)Reduction occurs in the more concentrated solution. (E)The greater the ratio in concentrations between the two cells, the greater is the initial voltage. 19.Half-reactions can be added together to obtain the complete balanced redox reaction if (A)the number of atoms balances. (B)the number of elections in the oxidation half-reaction equals the number of electrons in the reduction half-reaction. (C)one of the reactions is reduction and the other is oxidation. (D)the charges on the ions in each half-reaction are identical. (E)the individual half-reactions are balanced. 20.Which of these metals is not a transition element? (A)Zr (B)Mo (C)Os (D)Pb (E)Hg 21.The fact that the atomic size doesn't increase between the 5th and 6th period members of a group of transition metals is an example of (A)periodicity (B)group classification (C)electrical conductivity (D)lanthanide contraction (E)superconductivity. 22.What is the coordination number of copper in the [Cu(en)2(H2O)2]2+ complex? (A)0 (B)2 (C)4 (D)6 (E)none of these 23.Name the following coordination ccompound:Na3[Fe(H2O)6] (A)trisodium hexaaquairon(II) (B)sodium hexaaquairon(III) (C)trisodium hexahydroiron(III) (D)sodium iron(III) hydrate (E)trisodium iron(II) hexahydrate 24.Name the following compound:[Cr(NH3)2(en)Cl2]Cl (A)chromium(III) diammineethylenediamine trichloride (B)diammineethylenediaminodichlorochromium(III) chloride (C)diamminedichloroethylenediaminechromium(III) chloride (D)diammineethylenediaminetrichlorochromium(III) (E)trichlorodiamminoethylenediaminechromate 25.Which statement is incorrect? (A)Crystal field theory views the bond between the contral atom or ion and the ligands as largely electrostatic. (B)The spectrochemical series orders the ligands according to their abilities to spilt the d-orbital energy level. (C)Paramagnetic species contain unpaired electrons. (D)A "high spin" complex results from a strong field ligand. (E)The splitting of the energies of the d orbitals results from different interactions between the d orbitals and the ligands. 26.Reasoning from crystal field theorry,which correlatin of ligand and solution color is most reasonable? (A)weak field-yellow (B)strong field-yellow (C)weak field-red (D)strong field-violet (E)strong field-blue 27.Which of the following coordination complexes is most stable? (A)[Ni(NH3)6]2+ (B)NiCl2 (C)[Ni(H2O)6]2+ (D)[NiEDTA]2¯ (E)[Ni(CO)6]2+ 28.Name the functional group in the following molecule(in the order,circle, triangle,and rectangle) O H H H H ∥ ∣ ∣ ∣ ∣ HO—C—C—C—C—O—C—H ︱ ︱ ︱ ︱ NH2 H H H (A)alcohol, amine ,ketone (B)carboxylic acid, amine, ether (C)carboxylic acid, amine, ester (D)ester, nitro, rther (E)carboxylate, imine, alcohol 29.Which type of spectroscopy would be most useful in detecting the presence of a C═O functional group in a molecule? (A)IR (B)UV-Vis (C)NMR (D)MS (E)X-ray 30.Which of the following techniques could be used to distinguish between 1,3-pentaduene and pentane? (A)NMR spectroscopy (B)IR spectroscopy (C)UV spectroscopy (D)both A and B (E)all of the above 31.Which of the following spectroscopic methods would be able to easily distinguish between the following molecules? H OH H H H H ｜ ｜ ｜ ｜ ｜ ｜ H—C—C—C—H H—C—C—C—OH ｜ ｜ ｜ ｜ ｜ ｜ H H H H H H (A)Infrared spectroscopy (B)Ultra-violet spectroscopy (C)Nuclear Magnetic Resonance Spectroscopy (D)all of the above (E)The two molecules are indistinguishable. 至於计算题在最後一张 连同答案卷一起交回了@@" 如有强者能提供计算题题目和全部的答案 感激不尽^^ -- ┌───────────────┐ │ ◢██◣ 加权指数:5566 │ 老师就跟你说 5566 不要买 不要买 不要买 │ ﹨ █＼ ／▌ 成交量:7788 │ │ ◤□︵□ │ 　你听了没有？ (怒) │ 〝 ◣ 口◢ \／＼ 惨跌 │ │ ▁ ◥￣︺￣◣ ＼ │ 你没有听嘛！!（丢笔）　　- by senior --

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