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94年 - 學士後西醫化學94化學#86885
> 試題詳解
57. Which of the following compounds is a hydrazone?
(A)
(B)
(C)
(D)
(E)
答案：
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統計：
A(0), B(0), C(0), D(4), E(0) #2347833
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2022/07/09
私人筆記#4382162
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其他試題
53. Which of the following reagents is best used for conversion show below? (A) 1. NaBH4, 2. D3O+ (B) 1. NaBD4, 2. H3O+ (C) 1. LiAlH4, 2. D3O+ (D) 1. LiAlH4, 2. H3O+ (E) 1. NaBH4, 2. H3O+
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54. The mass spectra of alcohols often fail to exhibit detectable M peaks but instead show relatively large peaks. (A) M+1 (B) M+2 (C) M-15 (D) M-16 (E) M-18
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55. The following compound is used as an additive in gasoline to improve its octane value:Which of the following is a correct IUPAC name for this compound: (A) 2,2,4-trimethyl-1-pentene (B) 2,2,4-trimethyl-2-pentene (C) 2,2,4-trimethyl-5-pentene (D) 2,4,4-trimethyl-1-pentene (E) 2,4,4-trimethyl-2-pentene
#2347831
56. Which of the following amines will react with cyclopentanone to form an enamine? (A) CH3(CH2)3NH2 (B) (CH3)3N (C) pyridine (D) (CH3)3CNH2 (E) none of the above
#2347832
58. Which of the following statements describes the first step in the mechanism of the aldol condensation? (A) An alpha hydrogen is abstracted by the base to from an enolate anion. (B) A nucleophilic base attacks the carbony1 carbon atom. (C) The carbonyl oxygen is protonated by the base ion. (D) An alpha hydrogen is abstracted by an acid to the enolate anion. (E) none of above.
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59. What is the product from the following reaction? (A) (B) (C) (D) (E) none of the above
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60. Which of the following compounds is hydrolyzed most slowly in aqueous NaOH? (A) (B) (C) (D) (E)
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61. What is the major product of the following reaction? (A) (B) (C) (D) (E) none of the above.
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62. Which of the following is the best method for preparing N-benzylpyrrolidine from benzoic acid?(A) I). Pyrrolidine; II) SOCl2; III). 1. LAH; 2. H2O (B) I). SOCl2; II). Pyrrolidine; III). 1. LAH; 2. H2O (C) I). 1. LAH; 2. H2O; II). SOCl2; III). Pyrrolidine (D) I). SOCl2; II). 1. LAH; 2. H2O; III). 1. Pyrrolidine (E) None of the above
#2347838
63. What is the major product of the following conversions? (A) (B) (C) (D) (E)
#2347839
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