108年 - 108 學士後西醫：化學#77055

科目：學士後西醫-化學 | 年份：108年 | 選擇題數：45 | 申論題數：0

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所屬科目：學士後西醫-化學

選擇題 (45)

16. Using the rules of significant figures, calculate the following: 0.102 × 0.0821 × 273/1.01 (A) 2.2635 (B) 2.264 (C) 2.26 (D) 2.3 (E) 2.66351
17. Which of the following best describes an orbital? (A) Space where electrons are likely to be found in an atom. (B) Space which may contain electrons, protons, and/or neutrons. (C) The space in an atom where an electron is most unlikely to be found. (D) Small, walled spheres that contain electrons. (E) A single space within an atom that contains all electrons of that atom.
18. Which of the following is the correct electron configuration for OF− ? 
(A) 5d0702c91d9f4.jpg (B) 5d0702d0df837.jpg (C) 5d0702d8ac0eb.jpg(D) 5d070322da3a5.jpg(E) None of the above.

19. Which of the following resonance structures is the most stable? (A)5d07004de0da4.jpg (B) 5d070053b6f54.jpg(C) 5d07005a5df6c.jpg(D) 5d0700616054d.jpg(E) All of them are the same.

20. Which of the following does NOT contain at least one pi bond? (A) H2CO (B) CO2 (C) C2H2 (D) NO (E) All of the above (A-D) contain at least one pi bond.
21. Order the intermolecular forces (dipole-dipole, London dispersion, ionic, and hydrogen-bonding) from weakest to strongest. (A) dipole-dipole, London dispersion, ionic, and hydrogen-bonding (B) London dispersion, dipole-dipole, hydrogen-bonding, and ionic (C) hydrogen-bonding, dipole-dipole, London dispersion, and ionic (D) dipole-dipole, ionic, London dispersion, and hydrogen-bonding (E) London dispersion, ionic, dipole-dipole, and hydrogen-bonding
22. Which separation technique is based on differences in the affinity of the substances to be separated? (A) filtration (B) distillation (C) solvent extraction (D) paper chromatography (E) None of the above.
23. Which of the following gives correct rank of the ionization energies for Cs, Na, O, F, and S? (A) Cs ＜ Na ＜ S ＜ O ＜ F (B) Cs ＜ S ＜ Na ＜ O ＜ F (C) F ＜ O ＜ Na ＜S ＜ Cs (D) F ＜ O ＜ S ＜ Na ＜ Cs (E) Na ＜ S ＜ Cs ＜ F ＜ O
24. Naturally occurring copper exists in two isotopic forms: 63Cu and 65Cu. The atomic mass of copper is 63.55 amu. What is the approximate natural abundance of 63Cu? (A) 63% (B) 90% (C) 80% (D) 85% (E) 72%
25. The correct mathematical expression for finding the molar solubility(s) of Al(OH)3 is . (A) 9 s2 = Ksp (B) 3 s3 = Ksp (C) 27 s4 = Ksp (D) s4 = Ksp (E) 9 s3 = Ksp

26. Consider the following octahedral complex structures, each involving ethylene diamine and two different, unidentate ligands X and Y. Which, if any, of the following pairs are optical isomers? 5d072c2420c62.jpg(A) 1 and 4 (B) 1 and 2 (C) 3 and 4 (D) 1 and 3 (E) None of the above.

27. For which of the following processes would ∆S° be expected to be most positive? 
(A) NH3(g) + HCl(g) → NH4Cl(g) (B) 2NH4NO3(s) → 2N2(g) + O2(g) + 4H2O(g) (C) H2O(l) → H2O(s) (D) N2O4(g) → 2NO2(g) (E) O2(g) + 2H2(g) → 2H2O(g)

28. Why is this reaction considered to be exothermic?5d072d57117a7.jpg (A) Because energy difference A and energy difference C are about equal. (B) Because energy difference B is greater than energy difference C plus energy difference A. (C) Because energy difference A is greater than energy difference C. (D) Because energy difference B is greater than energy difference A. (E) Because energy difference B is greater than energy difference C.

29. The structure of pentose is shown on the down figure. How many carbon atoms with chirality are there in this molecule? 5d072d676ecdd.jpg(A) 1 (B) 2 (C) 3 (D) 4 (E) 5

30. Which one is Bragg equation? (A) F = ma (B) Hɸ = Eɸ (C) nλ = 2dsinθ (D) Δx ∙ Δp = h (E) E = mc2
複選題
61. Regarding the reactions of organic compounds, which of the following statements is NOT true?(一律送分，請勾選ABCDE) (A) The reaction of benzene and chloromethane can produce toluene. (B) Methanol is prepared in industry by the hydrogenation of carbon dioxide. (C) The commercial production of ethanol is carried out by the reaction of water with ethylene. (D) Aldehyde can be produced commercially by the oxidation of primary alcohol. (E) Ketone can be produced commercially by the oxidation of secondary alcohol.

62. Consider the following data concerning the equation: 5d07356831f77.jpg

(A) Rate = k[H2O2][I– ][H+ ] (B) Rate = k[H2O2]2 [I– ]2 [H+ ]2 (C) Rate = k[I– ][H+ ] (D) Rate = k[H2O2][H+ ] (E) Rate = k[H2O2][I– ]

63. Which of the following statements are true? A catalyst can act in chemical reaction to: 
I. Lower the activation energy. 
II. Change the equilibrium concentration of the products. 
III. Decrease ΔE for the reaction. 
IV. Change the order of the reaction. 
V. Provide a new path for the reaction. (A) I, II, and III (B) II and III (C) II and V (D) I and V (E) III and IV

64. Which of the following statements is true about the following electrochemical cell? 5d0735d5a53a5.jpg (A) The cell reaction is spontaneous with a standard cell potential of 0.06 V. (B) The cell reaction is nonspontaneous with a standard cell potential of –5.80 V. (C) The cell reaction is nonspontaneous with a standard cell potential of –0.06 V. (D) The cell reaction is spontaneous with a standard cell potential of 5.80 V. (E) The cell is at equilibrium.

65. Examine the phase diagram for the substance Bogusium (Bo) and select the correct statement.5d0735f617a10.jpg (A) Bo changes from a liquid to a gas as one follows the line from C to D. (B) The triple point for Bo is at a higher temperature than the melting point for Bo. (C) Bo changes from a solid to a liquid as one follows the line from C to D. (D) Point B represents the critical temperature and pressure for Bo. (E) Bo(s) has a lower density than Bo(l).

66. A 0.20 M solution of MgSO4 has an observed osmotic pressure of 6.0 atm at 25°C. Determine the observed van't Hoff factor for this experiment. (A) 1.23 (B) 2.00 (C) 1.66 (D) 1.80 (E) 1.45
67. Adipic acid contains 49.32% C, 43.84% O, and 6.85% H by mass. What is the empirical formula? (A) C3H5O2 (B) C2HO3 (C) C2H5O4 (D) C3HO3 (E) C3H3O4
68. On a new temperature scale (°L), water boils at 155.00°L and freezes at –10.00°L. Calculate the normal human body temperature using this temperature scale. On the Celsius scale, normal human body temperature is 37.0°C, and water boils at 100.0°C and freezes at 0.0°C. (A) 57.30°L (B) 47.35°L (C) 51.05°L (D) 61.05°L (E) 41.05°L
69. When the following equation C2H5OH + O2⇌ CO2 + H2O is balanced, what are the coefficients? (A) 2, 3, 1, 4 (B) 1, 3, 2, 3 (C) 1, 1, 1, 1 (D) 1, 2, 3, 4 (E) 1, 2, 2, 2
70. To form a buffer solution with pH = 9.0, how many moles of NH4Cl should be added to 3.0 L of 0.20 M NH3(aq) at 25ºC? (Kb of ammonia = 1.8 × 10‒5 ; assuming the volume of solution does not change after adding NH4Cl) (A) 0.36 (B) 0.72 (C) 1.08 (D) 3.6 (E) None of the above.
71. Which statement about hydrogen bonding is true? (A) Hydrogen bonding is the intermolecular attractive forces between two hydrogen atoms in solution. (B) The hydrogen bonding capabilities of water molecules cause CH3CH2CH2CH3 to be more soluble in water than CH3OH. (C) Hydrogen bonding of solvent molecules with a solute will not affect the solubility of the solute. (D) Hydrogen bonding interactions between molecules are weaker than the covalent bonds within the molecule. (E) Hydrogen bonding arises from the dipole moment created by the equal sharing of electrons within certain covalent bonds within a molecule.
72. How many effective atoms are there in a body-centered cubic unit cell? (A) 1/2 (B) 1 (C) 2 (D) 3/2 (E) 3
73. Which of the following has a zero dipole moment? (A) NH3 (B) HCN (C) PCl5 (D) SO2 (E) H2O
74. An electron is promoted from the π to the π∗ molecular orbital in an O2 molecule following the absorption of a photon. Compared to the bond length in the non-excited molecule, the O2 bond length will . (A) be shorter (B) be longer (C) not be affected (D) be same (E) None of the above.
75. Determine the percent dissociation of a 0.18 M solution of hypochlorous acid, HClO. The Ka for the acid is 3.5 × 10−8 . (A) 4.4 × 10−2 % (B) 3.5 × 10−6 % (C) 6.3 × 10−9 % (D) 4.4 × 10−4 % (E) 7.9 × 10−3 %
76. The solubility of CaSO4 in pure water at 0 oC is 1.14 gram per liter. The value of the solubility product is . (A) 7.01 × 10–5 (B) 8.37 × 10–3 (C) 7.01 × 10–2 (D) 8.37 × 10–5 (E) None of the above.

77. It is desired to determine the concentration of arsenic in a lake sediment sample by means of neutron activation analysis. The nuclide As 5d073741eef83.jpg captures a neutron to form As 5d07374a6ff49.jpg , which in turn undergoes β decay. The daughter nuclide produces the characteristic γ rays used for the analysis. What is the daughter nuclide? (A) 5d073752cfeed.jpg (B) 5d07375b4411f.jpg (C)5d0737629f7ce.jpg (D)5d073769b7931.jpg (E) 5d07376fbe17e.jpg
複選題

78. As shown below, compound IV can be prepared from reagents I, II, and III. Which of the following reaction conditions is the most suitable for the preparation of IV? 5d07378379fd9.jpg(A) I is slowly added to II, and III is then added to the above mixture. (B) I is slowly added to II, and the resultant mixture is slowly added to III. (C) II is slowly added to I, and III is then added to the above mixture. (D) II is slowly added to I, and the resultant mixture is slowly added to III. (E) I is slowly added to III, and II is then added to the above mixture.

79. The equilibrium constant of a certain reaction was measured at various temperatures to give the plot shown below. What is Δ S o (J/mol∙K ) for the reaction? (R = 8.314 J/mol∙K ) 5d07379b79db6.jpg(A) 0.20 (B) 3.0 (C) −50 (D) −8.3 × 103 (E) 33

80. For the reaction N2(g) + 2H2(g) → N2H4(l), if the percent yield for this reaction is 41.0%, what is the actual mass of hydrazine (N2H4) produced when 30.57 g of nitrogen reacts with 4.45 g of hydrogen? (A) 24.00 g (B) 28.60 g (C) 15.00 g (D) 12.00 g (E) 14.60 g
81. A sample of helium gas has been contaminated with argon gas. At 1 atm and 25°C, the density of the mixture is 0.200 g/L. What is the volume percent helium in the sample? (A) 90.0% (B) 97.5% (C) 80.3% (D) 2.5% (E) 99%
82. Which of the following is NOT a state function? (A) entropy (B) enthalpy (C) internal energy (D) heat (E) temperature
83. A metal ion in a high–spin octahedral complex has four more unpaired electrons than the same ion does in a low–spin octahedral complex. The metal ion could be: (A) V2+ (B) Cu2+ (C) Mn2+ (D) Cr3+ (E) Co2+
84. Which of the following coordination compounds will form a precipitate when treated with an aqueous solution of AgNO3? (A) [Cr(NH3)3Br3] (B) [Mo(Cl)2(NH3)4](NO3) (C) Na3[WCl6] (D) [Pt(NOlinear)2(OAc)2](Br)2 (E) None of the above.
85. Which of the following species is diamagnetic? (A) CN (B) B2 (C) O2 (D) All of the above. (E) None of the above.

86. Which of the lines in the figure below is the best representation of the relationship between the volume of a gas and its pressure, other factors remaining constant?5d07383de41b5.jpg (A) a (B) b (C) c (D) d (E) e

87. Sulfur tetrafluoride adopts a see-saw geometry with two axial F atoms with a F–S–F angle of about 180º and two equatorial F atoms at about 90º from the axial fluorines. Which statement most accurately describes the axial and equatorial S–F bonds? (A) The axial S–F bonds are longer because the two fluorine atoms must share bonding to the same orbital on sulfur. (B) The axial S–F bonds are longer because they experience greater repulsion from the other fluorine atoms in the molecule. (C) The equatorial S–F bonds are longer because the equatorial F–S–F bond angle is the smallest in the molecule. (D) The equatorial S–F bonds are longer because they experience greater repulsion from the lone pair on sulfur. (E) The equatorial S–F bonds are longer because they experience greater repulsion from two axial fluorine atoms.
88. According to the Haber-Bosch process, which statement is true? (A) The reaction to produce NH3 from H2 and N2 is reversible. (B) According to the Le Châtelier’s principle, the overall reaction is favorable to produce products in the state of high pressure. (C) Increasing the reaction temperature can accelerate the reaction to equilibrium. (D) Using Fe as a catalyst can accelerate the reaction to equilibrium, but cannot change the equilibrium between the reagents and products. (E) All statement are true.

89. A sample of a washing powder that contains a mixture of Na2CO3 and NaHCO3 is titrated with aqueous HCl and the following result is obtained: What is the mole ratio of CO32– to HCO3– in the washing powder?5d07385c70513.jpg (A) 2 mole CO32– : 1 mole HCO3– (B) 1 mole CO32– : 1 mole HCO3– (C) 1 mole CO32– : 2 mole HCO3– (D) 1 mole CO32– : 3 mole HCO3– (E) 3 mole CO32– : 1 mole HCO3–(一律送分)
90. A student gave a molecule the following name:2-methyl-4-t-butylpentane However, the teacher pointed out that, although the molecule could be correctly drawn from this name, the name violates the IUPAC rules. What is the correct (IUPAC) name of the molecule? (A) 2-t-butyl-4-methylpentane (B) 2,4,5,5-tetramethylhexane (C) 1-sec-butyl-1,2,2-trimethylpentane (D) 2-t-butyl-4-iso-propylbutane (E) None of the above.

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