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

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

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

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.

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

4.失戀時最好躲起來療傷，不向別人抒發心情，畢竟沒有人能真正了解自己的痛苦。(A)O(B)X

5.談戀愛是很傷腦筋的事，為了避免受到傷害，最好都不要交朋友。(A)O(B)X