1. 下列哪組是大氣中含量最豐富的氣體？
(A) O₂, Ne
(B) N₂, O₂
(C) CO₂, O₂
(D) He, CO₂

47. A d6 ion is complexed with six strong-field ligands (for example, SCN-). What is the number of unpaired electrons in this complex? (A) 3(B) 2 (C)0(D) 1(E) 4

48. Which of the following state nts are true about starch? I: the mono omers are fructose and Rlucose； Il: the mon onomer is glucose； Ill: it is the main carbohydrate reservoir in plants； IV: It is the main carbohydrate reservoir in animals； V: It is an addition polymer； VI. It is a condensation polymer. (A) II, III, VI (B) I, IV, V (C) I, II, IV, V (D) I, II, V (E) II, IV, VI

49. Which of the following pairs of substances could form an addition copolymer? (A) HOCH2CH2OH + HOOCH2COOH(B) HOOC(CH2)3COOH + HOCH2CH2CHANH2 (C) HOOCCH2CH2COOH + HOCH2OCH2 OH (D) H2C=CHCH=CH2 +H2CCH=CHCH3 (E) H2NCH2 COOH + H2NCH2CH2COOH

50. Which of the following statements is/are true of benzene? I: Benzene belongs to a class of cyclic unsaturated hydrocarbons known as the aromatic hydrocarbons；II : Benzene undergoes substitution reaction in which hydrogen atoms are replaced by other atoms； Ill: sp2 hybrid orbitals on each carbon of a benzene molecule are used to form the H-H and H-C a bonds. (A) IIl only (B) II only (C) I only (D) I and Il (E) I and Ill

2. 真實氣體在何種情況下最接近理想氣體？ (A) 低溫低壓 (B) 高溫低壓 (C) 高溫高壓 (D) 低溫高壓

3. 一個水分子，最多可形成幾個氫鍵？ (A) 0 (B) 2 (C) 4 (D) 無限多個

4. 一個具有七個質子、七個電子及八個中子的元素是下列哪一個? (A) Si (B) N (C) P (D) C

5. 交通號誌的綠色光，其頻率為 ，其波長為何？ (光速 = ) (A) 700 nm (B) 580 nm (C) 530 nm (D) 470 nm

6. 木星距離地球約 6.4 x 108 km，無線電波的速率和光一樣 (3.0 x )，從地球用無線電波和在木星上的太空船連絡，需要多少時間？(A) 0.59 hr(B) 1.16 hr(C) 5.9 hr(D) 11.6 hr

7. 唾液中含有一種酵素可催化： (A) 核酸之分解　(B) 肉類蛋白質之分解 (C) 澱粉之分解　(D)　蔗糖之分解