1) Choose the pair of substances that are most likely to form a homogeneous solution. A) C6H14 and C10H20 B) LiBr and C5H12 C) N2O4 and NH4Cl D) C6H14 and H20 E) None of the pairs above will form a homogeneous solution. Answer: A 2) Place the following substances in order of increasing vapor pressure at a given temperature NF3 NH3 BC13 A) NH3 < NF3 < BC13 B) NF3 < NH3 < BC13 C) BC13 < NF3 < NH3 D) NH3 BC13 < NF3 E) BC13 NH3 < NF3 Answer: A 3) Which of the following statements is TRUE? A) The solubility of a gas is not dependent on either temperature or pressure. B) The solubility of a gas is highly dependent on pressure. C) The solubility of a gas is highly dependent on both pressure and temperature. D) The solubility of a gas is highly dependent on temperature. E) None of the above. Answer: C 4) Place the following solutions in order of increasing osmotic pressure. I. 0.15 M C2H602 II. 0.15 M MgCl2 III. 0.15 M NaCl A) III < I < II B) II < III < I C) I < II < III D) II < I < III E) I < III < II Answer: E