12. Consider a solution containing the following cations: Na⁺, and Ag⁺. Treatment of the solution with dilute HCl followed by saturation with H2S results in formation of precipitate(s). Which ions still remain in solution ?
(A) Ag⁺ only；
(B) Na⁺, ；
(C) Ag⁺ and ；
(D) Na⁺, , and ；
(E) Na⁺ only

8 If equal, rigid spheres are arranged in a simple cubic lattice in the usual way (i.e., in such a way that they touch each other), what fraction of the corresponding solid will be empty space? (A) 0.52； (B) 0.32； (C) 0.68； (D) 0.48； (E) none of these

9 At a given temperature, you have a mixture of benzene (vapor pressure of pure benzene = 745 torr) and toluene (vapor pressure of pure toluene = 290 torr). The mole fraction of benzene in the vapor above the solution is 0.590. Assuming ideal behavior, calculate the mole fraction of toluene in the solution. (A) 0.213； (B) 0.778； (C) 0.641； (D) 0.359； (E) 0.590

10. A 1 L container originally holds 0.4 mol of N2, 0.1 mol of O2, and 0.08 mole of NO. If the volume of the container holding the equilibrium mixture of N2, O2, and NO is decreased to 0.5 L without changing the quantities of the gases present, how will their concentrations change? (A) The concentration of NO will increase； the concentrations of N2 and O2 will decrease. (B) The concentrations of N2 and O2 will increase； and the concentration of NO will decrease. (C) The concentrations of N2, O2, and NO will increase. (D) The concentrations of N2, O2, and NO will decrease. (E) There will be no change in the concentrations of N2, O2, and NO.

11. In titrating 0.20 M hydrochloric acid, HCl, with 0.20 M NaOH at 25°C, the solution at the equivalence point is (Cl: 35.45 g/mol): (A) 0.20 M NaCl； (B) very acidic； (C) slightly acidic； (D) 0.10 M HCl and 0.20 M NaOH； (E) 0.10 M NaCl

13. A mixture of hydrogen and chlorine remains unreacted until it is exposed to ultraviolet light from a burning magnesium strip. Then the following reaction occurs very rapidly:  → ∆G = -45.54 kJ； ∆H = -44.12 kJ； ∆S = -4.76 J/K  Which of the following is consistent with this information? (A) The reactants are thermodynamically more stable than the products. (B) The reaction has a small equilibrium constant. (C) The ultraviolet light raises the temperature of the system and makes the reaction more favorable. (D) The negative value for ∆S slows down the reaction. (E) The reaction is spontaneous, but the reactants are kinetically stable.

14. The smallest amount of radioactive material that will support a self-sustained fission reaction is called the (A) molar mass； (B) moderator； (C) supercritical mass； (D) subcritical mass； (E) critical mass

15. Give the number of geometrical isomers for the octahedral compound [MA2B2C2], where A, B, and C represent ligands. (A) 1； (B) 2； (C) 3； (D) 5； (E) none of these 

1.提出邀約時，應以「喜歡」代替「欣賞」，這樣對方才能感受到自己的愛意。(A)O(B)X

2.高中階段應努力尋找相知相惜的伴侶，盡情享受戀愛喜悅、愛與被愛的幸褔，才不枉費美好青春。(A)O(B)X

3.真正的愛只要保有親密感與承諾即可，有沒有激情都無所謂。(A)O(B)X