113年 - 113 國立中興大學_公費生招生考試_學士後醫學系：化學科#119556

科目：學士後西醫-化學 | 年份：113年 | 選擇題數：50 | 申論題數：0

試卷資訊

所屬科目：學士後西醫-化學

選擇題 (50)

1. Please determine the more stable anion in each of the following cases: (i), (ii), and (iii). (A) a, c, f (B) a, d, f (C) b, d, f (D) b, d, e (E) a, c, e

2. When a solution of 0.1 M Na2CO3/0.1 M NaHCO3 (H2CO3: Ka1 = 4.2 x I0-7 and Ka2 = 4.69 x I0-11) is titrated with 0.1 M HCl. Which one is the titration curve?(A)(B)(C)(D)(E)

3.The relative initial rates of the reaction X2 + Y2 →products in vessels (a)-(d) follow a ratio of 1:8:2:16. Unshaded spheres depict X2 molecules, while shaded spheres represent the presence ofY2? molecules at the start of the reaction. What is the overall order of reaction? (A)l (B)2 (C)3 (D)4 (E)5

4. Michaelis and Menten assumed that the overall reaction for an enzyme-catalyzed reaction could be expressed as:

Based on above reaction, the rate of breakdown of the enzyme-substrate complex can be described by the expression: (A) k1([Et]-[ES]) (B) k1([Et]-[ES])[S] (C)k2[ES] (D) k-1[ES]+k2[ES] (E)k-1[ES]
5. Which one is not an input transducer? (A) Mass analyzer (B) Glass-calomel electrode (C) Electron multiplier (D) Photomultiplier tube (E) Photodiode

6. Please identify the meso compound(s) in the given chemical structures (I), (II) and (III). (A) I only (B) II only (C) III only (D) I and III only (E) I, II, and III
7. What is the volume of a cube (V=L3) with the side length of 2.0 ± 0.2 cm? (A) 8.0 ± 0.008 cm3 (B) 8.0 ± 0.2 cm3 (C) 8.0 ±0.6 cm3 (D) 8.0 ± 1.4 cm3 (E) 8.0 ± 2.4 cm3

8. Please write the IUPAC name for the compound presented below. (A) 2-propy 1-3-methylbutane (B) 4-isopropylpentane (C) 2-isopropylpentane (D) 5,6-dimethylhexane (E) 2,3-dimethylhexane
9. Write the names for P4Se3 and K₂[PtCl4]. (A) Phosphorous selenide and potassium chloroplatinate (B) Tetraphosphorous triselenide and dipotassium monotetrachloroplatinate (C) Phosphorous selenide and potassium chloroplatinate(II) (D) Tetraphosphorous triselenide and potassium tetrachloroplatinate(II) (E) Phosphorous selenide and dipotassium tetrachloroplatinate

10. In the following energy diagram illustrating the progression of a reaction, please identify the location(s) indicating the presence of an intermediate? (A) Only I, III, and V (B) Only II and IV (C) Only I (D) Only IV (E) I, II, III, IV, and V

11. Which one would result in an endothermic AHsoiution? (A) When |△Hlattice| ＜ |△Hhydration| (B) When I△Hlatticel is close to |△Hhydration| (C) When |△Hlatticel ＞|△Hhydration|(D) When |△Hsolvent|>|△Hsolute|(E) When |△Hsolven|<|△Hsolute|

12. Which description best represents the change in entropy for the given reaction?(A)△S = 0 (B) △S = 1 (C) △S ＞ 0 (D) △S ＜ 0 (E) None of the above

13. When 3-Chloro-3-methylhexane undergoes treatment with a strong base, how many distinct alkenes will be generated? (A)1 (B)2 (C)3 (D)4 (E)5

14. The following are the two pKa values for serine. What is the isoelectric point (pl) of serine? (A) 9.15 (B) 6.94 (C) 5.68 (D) 2.21 (E) None of the above

15. Based on the provided bond energies, what is the △H°rxn for the reaction below? (A) -564 kJ (B) +564 kJ (C) +270 kJ (D) -270 kJ (E) -612 kJ

16.What is the solubility of La(IO3)3 (Ksp = 1.0✖10-11) in a solution prepared by mixing 1.0 L of0.0040 M La(NO3)3 with 1.0 L of 0.20 M NaIO3? (A) 1.0✖10-4 M (B)1.0✖10-6M (C)1.0✖10-8 M (D)  1.0✖10-9 M (E)1.0✖10-10M
17.Which one has the less significant effect on the activity coefficient for a given species? (A) Ionic strength of the solution (B) Molar concentration of the species (C) Charge on the species (D) Temperature of the solution (E) Effective diameter of the hydrated ion

18. Consider the acid-catalyzed hydration reaction provided below:
Which cations and anions among the following are intermediates according to the approved mechanism for the above reaction? (A) Only I and II (B) Only I, II, and III (C) Only III (D) Only IV (E) None of the above. The process is concerted
19. Which of the following outlines the characteristic pattern observed for an isopropyl group in a 1H NMR spectrum? (A)The spectrum contains a 1H septet and a 6H doublet (B) The spectrum contains a 1H sextet and a 6H doublet (C) The spectrum contains a 1H quartet and a 6H quartet (D) The spectrum contains a 1H triplet and a 6H quartet (E) The spectrum contains a 1H doublet and a 6H quartet
20. Which statement is correct? (A) Comparison with standards is used to identify random error (B) Calibration curve is used to compensate the matrix effect (C) Standard addition method is used to reduce the random errors in measurements (D) Standard addition method is used to compensate the matrix effect (E) Internal standard is used to reduce the random error in measurements

21. Place the following in order of decreasing radius. (A)Te2- ＞F- ＞O2- (B) Te2- ＞ O2-＞ F-(C) O2-＞F-＞Te2- (D) F- ＞ Te2- ＞ O2- (E)F- ＞O2- ＞Te2-
22. Commercial grade hydrofluoric acid (HF = 20.01 g mol-1) solutions are typically 48.0% (w/w). What is the molality of the HF, if the solution has a density of 1.15 g mL-1? (A) 20.9 m (B) 27.6 m (C) 40.1 m (D) 46.1 m (E) 53.1 m

23. Among the following, which radical is the most stable?(A) I (B) II (C)III (D)IV (E)V
24. Place the following in order of decreasing magnitude of lattice energy.
NaF MgO CsI AIN (A) CsI ＞ AIN ＞ MgO ＞ NaF (B) AIN ＞ MgO ＞ NaF ＞ CsI (C) NaF ＞ CsI ＞ MgO ＞ AIN (D) AIN ＞ MgO ＞ CsI ＞ NaF (E) CsI ＞ NaF ＞ MgO ＞ AIN
25. The method detection limit is (A) The lowest concentration of the calibration curve (B) The minimal detectable signal intensity of an analyte (C) The lowest detectable concentration of an analyte (D) The minimal measurable concentration of an analyte (E) The minimum concentration of an analyte that can be reliably distinguished from the blank

26. What is the rate law for the given reaction and its mechanism? (A) Rate = k[HgCl2][C2O42-] (B) Rate = k[HgCl2]2[C2O42-] (C) Rate = k[Hg2Cl2] (D) Rate = k[HgCl2][C2O42-]2 (E) Rate = k[HgCl2]2[C2O42-]2
27.Which one has a different relationship between the signal and concentration? (A) Scattering (B) Fluorescence (C) Phosphorescence (D) Absorption (E) Emission
28.A 50.0-mL aliquot of 1.0 M NaBrO (HBrO: pXa = 8.70) is titrated with 1.0 M HCl. What is the pH after adding 25.0 mL of the acid? (A) 11.30 (B) 9.30 (C) 8.70 (D) 5.30 (E) 3.30

29.Which option below outlines an effective method for relocating the position of a π bond? (A) Substitution, followed by addition (B) Addition, followed by substitution (C) Elimination, followed by addition (D) Addition, followed by elimination (E) None of the above
30. The nitrosonium ion, NO+, forms numerous fascinating complexes with nickel, cobalt, and iron. Based on molecular orbital theory, which of the following statements accurately describes NO+? (A) The nitrosonium ion, NO+, possesses a bond order of 2 and exhibits paramagnetism (B) The nitrosonium ion, NO+, possesses a bond order of 2 and exhibits diamagnetism (C) The nitrosonium ion, NO+, possesses a bond order of 3 and exhibits paramagnetism (D) The nitrosonium ion, NO+, possesses a bond order of 3 and exhibits diamagnetism (E) None of these choices are correct
31. At pH 8.0, the predominant form of ethylenediaminetetraacetic acid (EDTA; H4Y: K1= 1.02 x 10-2, K2 = 2.14 x 10-3, K3 = 6.92 x 10-7, K4 = 5.50 x 10-11) is (A) H3Y- (B)H2Y2- (C) HY3- (D) Equal amounts of H2Y2- and HY3- (E)Y4-
32. For a reaction producing both kinetic and thermodynamic products, which of the followings are linked to the kinetic product? 
(I) It is formed faster. 
(II) It is the more stable product.
(III) l) It involves the lower energy transition state.
(IV) ) It is favored with cold reaction conditions. (A) Only I (B) Only I, III and IV (C) Only II (D) Only II, III and IV (E) Only III
33. How many lone pairs of electrons are in the Lewis structure of D-glucose (C6H12O6 = 180.16 g mol- 1)? (A) 4 (B)6 (C)8 (D)9 (E)12

34. Which of the following structures represent aromatic compounds?(A) Only I, II and III (B) Only I, III and IV (C) Only I, II, and IV (D) Only II, III and IV (E) I, II, III and IV

35. Based on the molecular orbital diagram shown below, which one is the most stable species? (A) NO2- (B)NO- (C)NO (D)NO+ (E) NO2+
36. Give the ground state electron configuration for Se2-. (A) [Ar]4s24p6 (B) [Ar]4s23d104p2 (C) [Ar]4s23d84p6 (D) [Ar]4s23d104p6 (E) [Ar]4s23d104p4

37. Displayed below is a step in the catalytic cycle of the Suzuki reaction, with 'L' representing a ligand. Which term from the provided options best describes this step?(A) Oxidative addition (B) Reductive elimination (C) Transmetallation (D) Nucleophilic substitution (E) None of the above

38. Which carbon atom is referred to as the anomeric carbon? (A)l (B)2 (C)3 (D)4 (E)5
39. Which complex ion, assuming M is the metal ion and X and Y are ligands in an octahedral geometry, can display geometric isomerism? (A) [MX6]2+ (B) [MX5Y]2+ (C) [MX4Y2]2+ (D) [MX3Y3]2+ (E) None of the above
40. A solution is prepared by mixing 2.0 M H3A and 2.0 M NaH2A in the equal volume (H3A: pXa1 = 2.10, pXa2 = 7.20, pXa3 = 12.30). Which one is the closest to the pH value of this mixture? (A) 2.10 (B) 2.45 (C) 4.65 (D) 7.20 (E) 9.75
41. Please select the accurate statements regarding entropy. 
(I) After the mixing of two gases, AS is positive.
(II) Entropy is a thermodynamic property associated with the level of disorder. 
(III) If the temperature of a gas decreases, AS is positive. 
(IV) Molecules in the gaseous state exhibit higher entropy compared to those in the liquid state. (A) Only I and III (B) Only I, II, III (C) Only I and II (D) Only I, II, IV (E) Only II and III
42. What is the pH of the 1.0 M Na2HAsO4 solution (H3ASO4: pXa1 = 2.24, pXa2 = 6.96, pXa3 = 11.50)? (A) 2.24 (B) 4.60 (C) 6.96 (D) 9.23 (E) 11.50

43. In the illustrated resonance form of ozone below, what is the formal charge on the central oxygen atom? (A)+2 (B)+1 (C)0 (D)-1(E)-2
44. Which statement accurately describes voltaic cells?
(I) Electrons flow from the anode to the cathode. 
( II ) Electrons flow form the more negatively charged electrode to the more positively charged electrode. (III) Electrons flow from higher potential energy to low potential energy. (A) Only I (B) Only I and II (C) Only I and III (D) Only II and III (E) I, II and III

45. Which solution has the highest pH? (A) 0.1 M KCN, Ka of HCN = 4.0 x I0-10 (B) 0.1 M NaHS, Kb of HS- = 1.8 x 10-7 (C) 0.1 M NaOAc, Ka of HOAc = 1.8✖10-5 (D) 0.1 M NaClO, Ka of HClO = 3.2 x 10-8 (E) 0.1 M NH4NO3, Kb of NH3 = 1.8 x I0-5
46. In a decomposition reaction where the half-life is independent of the initial concentration of the reactant, what is the order of the reaction? (A) Zero order (B) First order (C) Second order (D) Third order (E) The order cannot be determined without additional information
47. What is the molecular geometry of SeCl4? (A) Trigonal bipyramidal (B) Tetrahedral (C) Square pyramidal (D) Seesaw (E) Square planar.
48. What is the coordination number of an atom in the body-centered cubic unit cell, and how many atoms are present in the body-centered cubic unit cell? (A) 8, 2 (B) 8,4 (C) 12, 1 (D) 12, 2 (E) 12, 4

49. How many of the following species are paramagnetic? (A)1(B)2 (C)3 (D)4 (E)5
50. A 100.0 mL sample of an aqueous solution at 27°C contains 15.2 mg of an unknown nonelectrolyte compound. If the solution has an osmotic pressure of 7.60 torr, which one is the unknown compound? (A) C8H18N2O2 (B) C6H12O6 (C) C12H22O11 (D) C20H22O7 (E) C21H20O11

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