82. What is the structural relationship of the following two compounds?

(A) same compound
(B) enantiomers
(C) cis-trans isomers
(D) structural isomers
(E) diastereomers

3. What term describes the structural relationship between (2R,3R,4S)-2,3,4-trichloroheptane and (2R,3R,4R)-2,3,4-trichloroheptane? (A) not isomers (B) constitutional isomers (C) enantiomers (D) diastereomers (E) conformers

49.下列兩分子關係為何？(A)互為鏡像異構物(enantiomer) (B)互為非鏡像異構物(diastereomer) (C)相同的化合物(same compound) (D)互為組成異構物(constitutional isomer)

48. 下列兩者的關係為何？ (A) enantiomers (B) diastereomers (C) identical (D) constitutional isomers

9.Which of the following terms best describes the pair of compound shown: (A)enantiomers (B)diastereomers (C)meso compounds (D)same compound (E)threo-erythro isomer

33. 下列四組構造式中，哪些組是互為非鏡相異構物(diastereomers)？  (A) I, II (B) I, IV (C) II, III (D) III, IV

83. Two complex ions containing Ni are , which is blue, and , which is purple.Which one of these statements is correct? (en = H2N–CH2–CH2–NH2)(A) The wavelength of the light absorbed by is greater than the wavelength absorbedby .(B) The energy of the photon absorbed by [Ni(en)3]2+ is greater than that absorbed by.(C) Both complex ions are diamagnetic.(D) absorbs light in the violet region of the spectrum.(E) The crystal field splitting energy () is greater for than for .

84. Which of the following becomes more soluble in water upon addition of NaOH?(A) an amine (B) a carboxylic acid (C) a phenol(D) an alkane (E) two of these

85. Given the compound as shown below: Which of the labeled H atoms (1-5) in the following molecule would be predicted to be the most acidic?(A) 1 (B) 2(C) 3(D) 4(E) 5

86. Which of the following compounds exhibits the highest stability?(A) 2-methyl-1,2-pentadiene (B) (Z)-2-methyl-1,3-pentadiene(C) （E）-2-methyl-1,3-pentadiene (D) 2-methyl-2,3-pentadiene(E) 2-methyl-1,4-pentadiene

87. A metal fluoride crystallizes in a close-packed arrangement of fluoride ions, with the metal ions occupying one-half of the octahedral holes. What is the formula of this compound?(A) MF (B) MF2 (C) MF3 (D) M2F (E) M2F3

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