複選題
15. Place the following substances in order of increasing vapor pressure at a given temperature.  NF₃ NH₃ BCl₃
(A) NH₃＜NF₃＜BCl₃
(B) NF₃＜NH₃＜BCl₃
(C) BCl₃＜NF₃＜NH₃
(D) NH₃＜BCl₃＜NF₃
(E) BCl₃＜NH₃＜NF₃

11. Draw the Lewis structure for including any valid resonance structures. Which of the following statements is TRUE? (A) The nitrite ion contains one N-O single bond and one N=O double bond. (B) The nitrite ion contains two N-O bonds that are equivalent to 1.5 bonds. (C) The nitrite ion contains two N=Odouble bonds. (D) The nitrite ion contains two N-O single bonds. (E) None of the above are true.

12. Place the following in order of decreasing X-A-X bond angle, where A represents the central atom and X represents the outer atoms in each molecule. (A) (B) (C) (D) (E)

13. Draw the Lewis structure for . What is the hybridization on the Br atom? (A) sp3d2 (B) sp3d (C) sp3 (D) sp2 (E) sp

14. Using the VSEPR model, the molecular geometry of the central atom in SO2 is ________ (A) linear (B) trigonal planar (C) tetrahedral (D) bent (E) trigonal pyramidal

16. Which of the following compounds exhibits only dispersion and dipole-dipole intermolecular interactions? (A) H2 (B) HI (C) CO2 (D) CH3NH2 (E) CH3OH

17. Which of the following statements is TRUE? (A) The solubility of a solid is not dependent on either temperature or pressure. (B) The solubility of a solid is highly dependent on pressure. (C) The solubility of a solid is highly dependent on both pressure and temperature. (D) The solubility of a solid is highly dependent on temperature. (E) None of the above.

18. Consider the following reaction at equilibrium. What will happen if we add more SO3 in the system? SO2(g)+NO2(g)⇌ SO3(g)+NO(g) (A) The reaction will shift in the direction of products. (B) The reaction will shift to decrease the pressure. (C) No change will occur since SO3 is not included in the equilibrium expression. (D) The reaction will shift in the direction of reactants. (E) The equilibrium constant will decrease.

19. Which Br Φnsted-Lowry acid is not considered to be a strong acid in water? (A) HI (B) HBr (C) H2SO3 (D) HNO3 (E)HCI

20. Which of the following is a Lewis acid? (A) BCl3 (B) CH4 (C) NH3 (D) CHCl3 (E) None of the above are Lewis acids.

21. When titrating a weak monoprotic acid with NaOH at 25℃, the (A) pH will be less than 7 at the equivalence point. (B) pH will be equal to 7 at the equivalence point. (C) pH will be greater than 7 at the equivalence point. (D) titration will require more moles of base than acid to reach the equivalence point. (E) titration will require more moles of acid than base to reach the equivalence point.