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• 41.Thiols are alcohol analogs in which the oxygen has been replaced by sulfur (e.g., CH3SH). Given t
• 42.Rank the transition states which occur during the following reaction steps in order of increasing
• 36.Which of the following atoms is paramagnetic?(A)Cd (B)Tl1-(C)Nb1+ (D)Ni (E)Ru1+
• 43.An alkane with a molecular formula C6H14 reacts with chlorine in the presence of light and heat.
• 46.In the traction of a reagent such as HBr with an alkene, the frist step of the reaction is theto
• 47.Markovnikov’s rule “works” because:(A)The most stable transition state is the one leading to the
• 45.The product from the reaction of 1-pentene with Cl2 in H2O is named:(A)1-Chloro-2-pentanol (B)2-C
• 48.Treatment of 2-methyl-2-butene with HBr in the presence of peroxide yields(A)A primary alkyl brom
• 40.Which of the following is least able to serve as a nucleophile in a chemical reaction?(A)Br-(B)OH
• 49.The strongest evidence for the formation of a bridged bromonium ion as an intermediate in the add
• 50.A compound having a molecular formula of C20H36 is inert to catalytic hydrogenation. Which of the
• 51.The bimolecular subsittution reactionCH3Br + OH- →CH3OH + Br-is represented by the kinetic equati
• 52.The solvoysis reactions of optically active halides generally proceed with(A)Complete racemizatio
• 53.Which of the following statements pertaining to an SN2 reaction are true?1.The rate of reaction i
• 54.Which of the following phrases are not correctly associated with SN1 reactions?1.Rearrangements p
• 44.Carboxylic acids exist in the vapor state as:(A)Monomeric species (B)Cyclic esters (C)Cyclic dime
• 55.Which of the following statements is true concerning pKa?(A)The larger the pKavalue, the weaker t
• 56.Referring to the following equilibrium (R=alkyl group) (A)K < 1 ; the equilibrium would lie th
• 23. 如圖(十二)，圖上有B、C兩點 為圓的兩切線。若 將圓分成兩弧，且其中一弧的長為圓周長的1/10，則∠BPC的度數為何？(A)108(B)120(C)144(D)162
• (28~30)【題組】28. Why did Chief Seattle ask “Every part of the Earth is sacred to my people?”(A) Becaus
• 34. 如圖(十六)，有兩全等的正三角形 ABC、DEF，且D、A 分別為 △ABC、△DEF 的重心。固定D 點，將 △DEF 逆時針旋轉，使得A 落在 上，如圖(十七)所示。求圖(十六)與圖(十七
• 57.Which alkyne yields butanoic acid (CH3CH2CH2CO2H) as the only organic product upon treatment with
• 24. 下列何者是 22x7 - 83x6 + 21x5 的因式？(A) 2x + 3(B) x2(11x - 7)(C) x4(11x - 3)(D) x6(2x + 7)
• 58.Which of the following produces a significant amount of acetylide ion on reaction with acetylene?
• 59.Hydrogenation of cyclohexene releases 120kJ/mol of heat. Which of the following most likely repre