12.What is the major organic product obtained from the following reaction?

(A) I
(B) II
(C) III
(D) IV
(E) V

13. When CH3CH₂CHO reacts with PhNHNH₂ under conditions of acid catalysis, the major organic product is_______.(A) a nitrile (B) an imine(C) a hydrazone(D) an oxime (E) a ketone

14. What compound results from the 1,4-addition of one equivalent of HBr to 1,3-butadiene?(A) 1-bromo-1-butene(B) 1-bromo-2-butene(C) 4-bromo-1-butene(D) 3-bromo-1-butene(E) 2-bromo-2-butene

15. Which of the following is aromatic?(A) cycloheptatrienyl cation (B) 1,3,5-hexatriene(C) cyclobutenyl anion(D) 1,3-cyclohexadiene(E) cyclopentadienyl cation

16.How many hydrogens in the structure of 2,3-dimethylcyclopentanone are replaced by deuteriums when it is shaken in D2O containing trace hydroxide?(A) 1 (B) 2 (C) 3 (D) 6 (E) 7

17. Consider molecules with the formula C10H14Br2O2. Which of the following structural features is possible within this set ofmolecules?(A) 3 triple bonds(D) 4 double bonds(B) 2 rings and 1 double bond(E) 3 rings and 2 double bonds(C) 2 rings and 1 triple bond

18. Predict the two most likely mechanisms for the reaction of 2-iodohexane with sodium ethoxide.(A)SN2 and SN1 (B) E1 and E2 (C) SN2 and E2(D) E1 and SN1 (E) E2 and SN1

19. When 1,3-butadiene reacts with CH2=CHCN, which of the terms below best describes the product mixture?(A) a mixture of two diastereomers(C) a racemic mixture(E) a mixture of bicyclic compounds(B) a single compound(D) optically active

20. Give the product for the following reaction.(A) alanine(B) leucine (C) valine(D) isoleucine(E) glycine

21. Which of the following statements correctly describes the contribution of △S° to△G°?(A) The entropy term makes a greater contribution to AG° at high temperatures.(B) The entropy term makes a greater contribution to AG° at low temperatures.(C) The entropy term makes a greater contribution to AG° in exothermic reactions.(D) The entropy term makes a greater contribution to AG° in endothermic reactions.(E) The entropy term always makes a more significant contribution to AG° than does the enthalpy term.

22. What compound is produced when N,N-dimethylpropanamide is treated with LiAlH4?(A) CH3CH2CONH₂ (B) CH3CH2CH2NH2(C) CH3CH2CH2OH(D) CH3CH2CH2N(CH3)2 (E) CH3CH2N(CH3)2

115年 - [無官方正解]115 台灣聯合大學系統_碩士班招生考試_化學類：有機化學#140181

115年 - [無官方正解]115 國立臺灣大學_ 碩士班招生考試試題：有機化學(A)#137731

114年 - 114 台灣聯合大學系統_碩士班招生考試_化學類：有機化學#127002

113年 - 113 台灣聯合大學系統_碩士班招生考試試題_化學類：有機化學#122395

112年 - 112 台灣聯合大學系統_ 碩士班招生考試試題：有機化學#138486

112年 - 112-2 嘉南藥理大學_轉系招生藥學系考試試題_四技一年級：有機化學#119239

111年 - [無官方正解]111台灣聯合大學系統_ 碩士班招生考試試題：有機化學#138494

110年 - 110-2 嘉南藥理大學_轉系招生藥學系考試試題：有機化學#120872

110年 - 110 國立臺北科技大學_碩士班招生考試_分子科學與工程系有機高分子碩士班(甲組)：有機化學#110883

110年 - 110 國立清華大學碩士班考試入學試題_部分研究所:有機化學#104992