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89年 - 089 學士後西醫：化學#84970

科目：學士後西醫-化學 | 年份：89年 | 選擇題數：40 | 申論題數：9

試卷資訊

所屬科目：學士後西醫-化學

選擇題 (40)

1. Which element has the highest electron affinity? (A)oxygen (B)nitrogen (C)fluorine (D)chlorine
2. Predict which of the following sets of ions would have the greatest coulombic attraction in a solid compound: (A)Na+, F- (B)Na+, Cl- (C)Na+, Br- (D)Na+, I-
3. Identify the following species as Lewis acids: (A)NH3 (B)BF3 (C)CN- (D)F-

4. On the basis of configuration for the neutral molecule O2, write the molecular orbital configuration of the valence molecular orbital for5ea68c84b82f4.jpg, give the expected bond order. (A)0.5 (B)1.0 (C)1.5 (D)2.0 (E)2.5

5. Rank the following molecules, ions and radicals in order of increasing H－C－H bond angles: CH3+; CH3-; CH2; CH22+. (A)CH22+＞CH3+＞CH2＞CH3- (B)CH3-＞CH2＞CH3+＞CH22+ (C)CH2＞CH3+＞CH3-＞CH22+ (D)CH3+＞CH22+CH2＞CH3- (E)CH3+=CH22+=CH2=CH3-
6. Identify which kind of intermolecular forces might arise between molecules of the chloromethane: (A)ion-ion (B)ion-dipole (C)dipole-dipole (D)hydrogen bonding (E)dispersion
7. A gas sample is heated in a cylinder, using 375KJ of heat. At the same time a piston compresses the gas, using 645KJ of work. What is the change in internal energy of the gas during this process? (A)1020KJ (B)270KJ (C)1.72KJ (D)500KJ (E)30KJ
8. Calculate the enthalpy of the reaction P4(s) + 10Cl2(g) → 4PCl5(s) from the reactions: P4(s) + 6Cl2(g) → 4PCl3(l) △ H= -1278.8KJ PCl3(l) + Cl2(g) → PCl5(s) △ H= -124KJ (A)1.154 (B)-1.775 (C)-1.154 (D)2.433 (E)1.503MJ‧ mol-1
9. List the following substances in order of increasing molar entropy at 298K: (1)H2O(l), (2)H2O(g), (3)H2O(s), (4)C(s). (A)(2) ＞ (1) ＞ (3) ＞ (4) (B)(4) ＞ (3) ＞ (2) ＞ (1) (C)(1) = (2) = (3) = (4) (D)(1) ＞ (2) ＞ (3) ＞ (4) (E)(3) ＞ (1) ＞ (2) ＞ (4)
10. Which of the following compounds become less stable with respect to the elements as the temperature is raised? (1)PCl5(g) , (2)HCN(g), (3)NO(g), (4)SO2(g) (A)(1) (B)(3) (C)(1), (2) (D)(3), (4) (E)(2)
11. The following groups are found in some organic molecules. Which are hydrophilic? (1)－NH2; (2)CH3; (3)－Br; (4)－COOH. (A)(1), (3) (B)(2), (4) (C)(1), (2) (D)(2), (3) (E)(1), (4)
12. Estimate the boiling-point elevation of saturated solution of LiF at 100℃ (the solubility of LiF is 230 mg / 1.00×102g of water at 100℃). Assume that the ionic compounds undergo complete dissociation. (A)0.051℃ (B)0.22℃ (C)0.09℃ (D)0.030℃ (E)0.11℃
13. Arrange the following bases in order of increasing basicity strength: (1)ammonia, (2)ethylamine, (3)aniline. (A)(2) ＜ (1) ＜ (3) (B)(1) ＜ (2) ＜ (3) (C)(1) ＜(3) ＜ (2) (D)(3) ＜ (1) ＜ (2) (E)(3) ＜ (2) ＜ (1)
14. Calculating the pH of the solution resulting when 5.00mL of 0.150M NaOH(aq) is added to 25.00mL of 0.100M HCOOH(aq). Use Ka = 1.8×10-4 for HCOOH. (A)3.75 (B)3.38 (C)4.20 (D)7.5 (E)5.30
15. Arrange the following metals in order of increasing strength as reducing agents: Li, Na, K,Mg. (A)Na ＞ K ＞ Li ＞ Mg (B)K ＞ Mg ＞ Na ＞ Li (C)Li ＞ K ＞ Na ＞ Mg (D)Li ＞ Na ＞ K ＞ Mg (E)Mg ＞ K ＞ Na ＞ Li
16. Which of the following atoms has the greatest polarizability? (A)manganese (B)iron (C)nitrogen (D)oxygen (E)tellurfium
17. Xenon hexafluoride exists as the ionic solid XeF5+F-. Based on the Lewis structure for XeF5+ from VSEPR theory, predict XeF5+ shape. (A)octahedral (B)trigonal bipyramidal (C)square pyramidal (D)tetrahedral (E)distorted octahedral
18. What can a tetrahedral complex show?(1)stereoisomerism (2)geometrical isomerism (3)optical isomerism (A)(1), (2) (B)(1), (3) (C)(2), (3) (D)(1) (E)(3)
19 .Determine the type of structural isomerism that exists in the following pairs of compounds: [Co(NO2)(NH3)5]Br2 and [Co(ONO)(NH3)5]Br2. (A)ionization isomers (B)geometrical isomers (C)optical isomers (D)coordination isomers (E)linkage isomers
20. Indicate which molecules display optical inactive: (1)CH3CHBrCH2CH3, (2)CH3CH2CHCl2, (3)1-bromo-2chloropropane, (4)1,2-dichloropentane (A)(2) (B)(1), (2) (C)(3) (D)(1) (E)(4)
21.What mass of AgNO3 (169.9g / mol) is needed to convert 2.33g of Na2CO3 (106.0g / mol) to Ag2CO3? (A)7.47g (B)0.044g (C)0.022g (D)3.73g (E)1.57g
22. Calculate the molar concentration of HNO3 (63.0 g / mol) in the solution that has a specific gravity of 1.42 and is 70% HNO3 (w / w). (A)8M (B)4M (C)13M (D)16M (E)12M
23. Exactly 50.00mL of an HCl solution requires 29.71mL of 0.01963 M Ba(OH)2 to reach an end point with bromocresol green indicator. Calculate the molarity of the HCl. (A)0.0133M (B)0.0196M (C)0.029M (D)0.0046M (E)0.0233M
24.Calculate the hydronium ion concentration of pure water at 25℃. (A)1.0×10-6M (B)1.0×10-4M (C)1.0×10-7M (D)1.0×10-14M (E)1.0×10-8M
25. Calculate the hydronium ion concentration in 0.200M aqueous NaOH (A)0.020M (B)1.0 ×10-14M (C)5.0 ×10-14M (D)0.1M (E)1.0 ×10-7M
26. Which of the followings are Lewis acids?5ea6903b26a92.jpg(A)(1), (2) (B)(2), (4), (5) (C)(1), (4), (5) (D)(4), (5), (6) (E)(3), (4), (5)
27. Which of the follwing compounds can exist as pairs of cis-trans isomers? (1)CH3CH＝CH2 (2)(CH3)2C＝CHCH3 (3)CH3CH2CH＝CHCH3 (4)(CH3)2C＝C(CH3)CH2CH3 (5)ClCH＝CHCl (6)BrCH＝CHCl (A)3, 5, 6 (B)2, 3, 6 (C)3, 4, 5 (D)1, 2, 4 (E)2, 5, 6
28. Assign E or Z configuration to these alkenes, respectively: 5ea690811c1e5.jpg(A)E, Z, E (B)Z, E, Z (C)Z, Z, E (D)E, E, Z (E)Z, Z, Z
29. How many alkene products, including E,Z isomers, might be obtained by dehydration of 3-methyl-3-hexanol with aqueous sulfuric acid?5ea6909959cae.jpg(A)6 (B)5 (C)4 (D)3 (E)2
30. What product would you obtain from catalytic hydrogenation of this alkene,(CH3)2C＝CHCH2CH3? (A)1-methylpentane (B)2-methylpentane (C)4-methylpentane (D)1,2-dimethylpentane (E)3-methylpentane
31. Which of these compounds are chiral?5ea690c8e6c31.jpg(A)(2) (B)(1) (C)3 (D)1, 2 (E)1, 3
32. Assign R, S configurations to these molecules, respectively: 5ea690df79b2e.jpg(A)R, S, S (B)S, S, S (C)R, R, R (D)R, R, S (E)S, S, R
33. Which of these substances have a meso form, respectively? (1)2, 3-Dibromobutane,(2)2, 3-Dibromopentane, (3)2, 4-Dibromopentane. (A)1, 2 (B)1, 3 (C)2 (D)2, 3
34. Which reagent in the following compounds is more nucleophilic? (A)(CH3)2N- (B)(CH3)2NH (C)(CH3)3B (D)(CH3)3N (E)CH3NH2
35. Tell whether these reactions are SNl: 5ea69132e1f20.jpg(A)1, 2 (B)1, 3 (C)2, 3 (D)2 (E)3
36. How many nonequivalent kinds of protons are present in this compound, 2-methyl-1-butene? (A)1 (B)2 (C)3 (D)4 (E)5

37. Which of the following has the greatest Van der Waal’s attraction for other molecules of the same kind? (A)5ea6915ce8635.jpg(B)5ea6916a4219f.jpg(C)5ea69176734b5.jpg(D)5ea69181198d2.jpg(E)5ea6918ae860f.jpg

38. Which of the following alkenes reacts with HCl at the slowest rate? (A)(B)(C)(D)(E)
39.What are the reagents needed to accomplish the following transformation?5ea691be8c7cd.jpg(A)H2O / H+ (B)H2O / Peroxide (C)Hg(OAc)2, H2O / NaBH4 (D)BH3 (E)BH3 / OH-, H2O2, H2O
40. Which of the following compounds shown below is/are the product(s) of this reaction: 5ea691f835c34.jpg(A)Ⅰ only (B)Ⅱ only (C)Ⅰ and Ⅱ of equal yield (D)Ⅰ is major, Ⅱ is minor (E)Ⅰ is minor, Ⅱ is major

申論題 (9)

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Ⅲ. An unknown compound (A), C4H7ClO2, gave the following proton NMR data:(4%) 
(a)triplet, at 1.31 ppm (3H) 
(b)singlet, at 3.95 ppm (2H) 
(c)quartet, at 4.20 ppm (2H) 
Propose a structure for A.
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