89. A sample of a washing powder that contains a mixture of Na₂CO₃ and NaHCO₃ is titrated with aqueous HCl and the following result is obtained: What is the mole ratio of CO₃^2– to HCO^3– in the washing powder?
(A) 2 mole CO₃^2– : 1 mole HCO^3–
(B) 1 mole CO₃^2– : 1 mole HCO^3–
(C) 1 mole CO₃^2– : 2 mole HCO^3–
(D) 1 mole CO₃^2– : 3 mole HCO^3–
(E) 3 mole CO₃^2– : 1 mole HCO^3–(一律送分)

85. Which of the following species is diamagnetic? (A) CN (B) B2 (C) O2 (D) All of the above. (E) None of the above.

86. Which of the lines in the figure below is the best representation of the relationship between the volume of a gas and its pressure, other factors remaining constant? (A) a (B) b (C) c (D) d (E) e

87. Sulfur tetrafluoride adopts a see-saw geometry with two axial F atoms with a F–S–F angle of about 180º and two equatorial F atoms at about 90º from the axial fluorines. Which statement most accurately describes the axial and equatorial S–F bonds? (A) The axial S–F bonds are longer because the two fluorine atoms must share bonding to the same orbital on sulfur. (B) The axial S–F bonds are longer because they experience greater repulsion from the other fluorine atoms in the molecule. (C) The equatorial S–F bonds are longer because the equatorial F–S–F bond angle is the smallest in the molecule. (D) The equatorial S–F bonds are longer because they experience greater repulsion from the lone pair on sulfur. (E) The equatorial S–F bonds are longer because they experience greater repulsion from two axial fluorine atoms.

88. According to the Haber-Bosch process, which statement is true? (A) The reaction to produce NH3 from H2 and N2 is reversible. (B) According to the Le Châtelier’s principle, the overall reaction is favorable to produce products in the state of high pressure. (C) Increasing the reaction temperature can accelerate the reaction to equilibrium. (D) Using Fe as a catalyst can accelerate the reaction to equilibrium, but cannot change the equilibrium between the reagents and products. (E) All statement are true.

90. A student gave a molecule the following name:2-methyl-4-t-butylpentane However, the teacher pointed out that, although the molecule could be correctly drawn from this name, the name violates the IUPAC rules. What is the correct (IUPAC) name of the molecule? (A) 2-t-butyl-4-methylpentane (B) 2,4,5,5-tetramethylhexane (C) 1-sec-butyl-1,2,2-trimethylpentane (D) 2-t-butyl-4-iso-propylbutane (E) None of the above.

301 裝載危險物品車輛之 (A)前、後、左、右四側 (B)左、右兩側 (C)左、右、後三側 應懸 掛黏貼危險物品標誌及標示牌。

302 較易導致汽車鋼板彈簧斷裂的原因是： (A)超載 (B)潤滑不良 (C)減震器過緊 。

303 載運危險物品車輛是否可進入八卦山或雪山隧道內： (A)可以 (B)不可以 (C)沒有特別 規定 。

304 運送危險物品車輛之車頭及車尾應懸掛之三角旗，每邊不得少於 (A)三十公分 (B)二十 公分 (C)五十公分 。

305 道路危險物品運送人員專業訓練證明書之有效期限為 (A)2年 (B)1年 (C)3年 。