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• 35. Which of the following reactions do not produce HCI? (A) phosgene reacts with moisture (B) the a
• 36. An aqueous solution containing Ba2+, Pb2+, Cu2+, C3+and Hg22+ions is treated by HCI, H2S and NaO
• 37. How many pars of lone pair electrons dose the Xe atom of XeF4 possess? (A)1 (B) 2 (C)3 (D) 4 (E)
• 38. The coordination number of Cs in CsCl under ambient conditions is: (A)1 (B)2 (C)4 (D)6(E) 8
• 39. Which of the following elements has the highest electron affinity (most exothermic)? (A)O(B)F(C)
• 40. Which of the following statements is not correct for balancing the following chemical equation?a
• 52. The first law of thermodynamics can be given as ________. (A)ΔE = q + w (B)(C) for any spontaneo
• 53. When a system is at equilibrium, ________. (A)the reverse process is spontaneous but the forward
• 54. The second law of thermodynamics states that ________. (A)ΔE = q + w (B)ΔH°rxn = Σ nΔH°f (produc
• 55. ΔS is positive for the reaction ________. (A)2H2 (g) + O2 (g) → 2H2O (g) (B)2NO2 (g) → N2O4 (g)
• 56. With thermodynamics, one cannot determine ________. (A)the speed of a reaction (B)the direction
• 57. Photoionization processes (e.g., N2 + hν → N2+ + e-) remove UV of ＜ 150 nm. Which photoreaction
• 58. Which one of the following substances found in the atmosphere will absorb radiation in the infra
• 59. What is meant by the salinity of seawater? (A)percent by mass of salt in seawater (B)mass in gra
• 60. Which one of the following pairs cannot be mixed together to form a buffer solution? (A)C5H5N, C
• 61. The Henderson-Hasselbalch equation is ________. (A) (B) (C)(D)
• 62. Which compound listed below has the greatest molar solubility in water? (A)CdCO3 (B)Cd(OH)2 (C)
• 63. In which one of the following solutions is silver chloride the most soluble? (A)0.200 M HCl (B)0
• 64. A result of the common-ion effect is ________. (A)that some ions, such as Na+ (aq), frequently a
• 65. A Br∅nsted-Lowry base is defined as a substance that ________. (A)increases [H+] when placed in
• 66. The hydride ion, , is a stronger base than the hydroxide ion, O . The product(s) of the reaction
• 67. Which one of the following has the weakest conjugate base? (A)HF (Ka = 6.8 × 10-4) (B)HClO (Ka =
• 68. Which one of the following will change the value of an equilibrium constant? (A)changing tempera
• 69. The equilibrium constant for the gas phase reactionis Keq = 4.34 × 10-3 at 300 °(C) At equilibri
• 70. Consider the following reaction at equilibrium:Le Châtelier's principle predicts that the m