77. Which of the following compounds exhibits the pattern of m/z values: 41, 43, 57, 87, 101, 116?

 
(A) n-butyl n-propyl ether
(B) sec-butyl iso-propyl ether
(C) 2-heptanol
(D) hexanoic acid
(E) None of the above

73. Which of the following represents the HOMO of pentadienyl anion? 

74. Predict the major product for the following reaction sequence. (A) I (B) II (C) III (D) IV (E) V

75. The H-bonds formed in the tertiary structure of proteins can be differentiated from those formed in secondary structures. What is the major distinguishing factor? (A) The H-bonds in 3° structures are significantly stronger than those found in 2° structures. (B) The H-bonds in 3° structures are more random than those formed in 2° structures.(C) The H-bonds in 3° structures are formed by predictable interactions among the peptide backbone α-amine and α-carboxylate groups. (D) The H-bonds in 3° structures are formed by interactions involving the side chain R-groups. (E) Both B and D are correct.

76. Predict the outcome of the following sequence of reactions.  (A) I (B) II (C) III (D) IV (E) V

78. How many different β-hydroxyaldehydes and β-hydroxyketones, including constitutional isomers and stereoisomers, are formed upon treatment of a mixture of acetone and acetophenone with base? (A) 4 (B) 6 (C) 9 (D) 10 (E) 12 .

79. Deduce the identity of the compound from the data provided. C5H10O2: IR (cm-1): 3380 (br, s). 1 H-NMR (ppm): 1.30 (s, 3H), 3.50 (t, 1H), 3.64 (d, 2H), 4.38 (d, 2H), 4.52 (d, 2H). 13C-NMR (ppm): 20.72 (q), 40.78 (t), 67.59 (t), 79.74 (t). (A) (2,3-dimethyloxiran-2-yl)methanol (B) 1-(2-methyloxiran-2-yl)ethanol (C) 1-(oxetan-3-yl)ethanol (D) (3-methyloxetan-3-yl)methanol (E) (tetrahydrofuran-2-yl)methanol

80. Predict the major product for the following reaction. (A) I (B) II (C) III (D) IV (E) None of the above

1 運輸系統與運輸業經營的首要目標為： (A)便利 (B)經濟 (C)安全 (D)準點

2 運輸事業供應社會公眾勞務，其所收取之費率，即單位勞務之售票，稱為： (A)基本運價 (B)運費 (C)票價 (D)運價

3 下列何者為旅客使用私人運輸的隱含成本？ (A)購車費用 (B)保險支出 (C)牌照稅 (D)時間價值