Chem 2 Chapter 13 Questions Part 2 PDF

**51. What is a colligative property?**\ A) A property that depends on the number of solute particles in a solution\ B) A property that depends on the chemical nature of the solute\ C) A property that determines the solubility of a substance\ D) A property that depends only on temperature\ E) A prop...

**51. What is a colligative property?**\ A) A property that depends on the number of solute particles in a solution\ B) A property that depends on the chemical nature of the solute\ C) A property that determines the solubility of a substance\ D) A property that depends only on temperature\ E) A property that changes with molecular weight **52. Which of the following is NOT a colligative property?**\ A) Boiling point elevation\ B) Freezing point depression\ C) Vapor pressure lowering\ D) Osmotic pressure\ E) Surface tension **53. What does the Van't Hoff factor (i) represent?**\ A) The number of formula units in a solution\ B) The ratio of solute to solvent molecules\ C) The number of particles into which a solute dissociates in solution\ D) The boiling point of the solution\ E) The molecular weight of a solute **54. Which of the following compounds has a Van't Hoff factor (i) of 3?**\ A) NaCl\ B) KBr\ C) CaCl₂\ D) C₆H₁₂O₆\ E) CH₃COOH **55. What happens to the boiling point of a solution when a non-volatile solute is added?**\ A) It increases\ B) It decreases\ C) It remains the same\ D) It depends on the solute's polarity\ E) It depends on the solute's reactivity **56. Freezing point depression occurs because:**\ A) Solute particles disrupt the formation of the solid phase\ B) Solute particles increase kinetic energy\ C) Solvent molecules move faster\ D) The density of the solvent changes\ E) The vapor pressure of the solvent increases **57. Which solution has the highest boiling point?**\ A) 1 M NaCl\ B) 1 M C₆H₁₂O₆\ C) 1 M CaCl₂\ D) 1 M CH₃COOH\ E) 1 M KNO₃ **58. What is the key factor in determining the magnitude of a colligative property?**\ A) The number of solute particles in solution\ B) The identity of the solute\ C) The color of the solution\ D) The boiling point of the solvent\ E) The molecular weight of the solute **59. Which of the following best describes a solution?**\ A) A homogeneous mixture with completely dissolved solute particles\ B) A heterogeneous mixture with visible solute particles\ C) A suspension with large particles that settle over time\ D) A mixture that cannot be separated by filtration\ E) A system with intermediate-sized particles **60. What distinguishes a colloid from a true solution?**\ A) Colloids have larger particle sizes than solutions\ B) Colloids scatter light (Tyndall effect)\ C) Colloids cannot be separated by normal filtration\ D) Colloidal particles do not settle over time\ E) All of the above **61. Which of the following is an example of a colloid?**\ A) Saltwater\ B) Air\ C) Milk\ D) Sugar solution\ E) Copper sulfate solution **62. The Tyndall effect is observed in:**\ A) True solutions\ B) Colloids\ C) Suspensions\ D) Solvents\ E) Electrolyte solutions **63. What characteristic defines a hydrophilic colloid?**\ A) Strong attraction to water\ B) Repels water\ C) Does not interact with water\ D) Completely dissolves in water\ E) Only interacts with nonpolar solvents **64. How do hydrophilic colloids remain stable in water?**\ A) Hydration shell formation\ B) Electrostatic repulsion\ C) Emulsification\ D) Both A and B\ E) None of the above **65. What stabilizes hydrophobic colloids in water?**\ A) Surface charge addition\ B) Emulsification\ C) Hydration shell formation\ D) Both A and B\ E) None of the above **66. What role do surfactants play in emulsification?**\ A) Reduce surface tension\ B) Prevent aggregation of hydrophobic particles\ C) Form micelles around particles\ D) All of the above\ E) None of the above **67. Which of the following is an example of a hydrophobic colloid?**\ A) Starch\ B) Milk\ C) Paint\ D) Gelatin\ E) Protein solution **68. What happens when a colloidal solution is destabilized?**\ A) Particles aggregate and settle out\ B) Particles dissolve completely\ C) The solution remains unchanged\ D) The solution turns into a true solution\ E) The solute evaporates **69. What happens to osmotic pressure when solute concentration increases?**\ A) It increases\ B) It decreases\ C) It remains unchanged\ D) It depends on temperature\ E) It depends on solute identity **70. Which factor does NOT affect the magnitude of colligative properties?**\ A) The number of solute particles\ B) The solvent identity\ C) The Van't Hoff factor\ D) The temperature of the solution\ E) The mass of the solvent **71. Which type of solute has the greatest effect on colligative properties?**\ A) A strong electrolyte\ B) A weak electrolyte\ C) A non-electrolyte\ D) A gas\ E) A polymer **72. What does the addition of a solute do to the vapor pressure of a solvent?**\ A) Lowers it\ B) Raises it\ C) Has no effect\ D) Increases temperature\ E) Depends on solute identity **73. Why does an electrolyte have a greater effect on colligative properties than a nonelectrolyte?**\ A) It dissociates into multiple particles\ B) It is more soluble\ C) It has a higher molecular weight\ D) It increases entropy\ E) It reacts with the solvent **74. What is the key difference between a solution and a colloid?**\ A) Colloids scatter light\ B) Colloids settle over time\ C) Solutions have larger particles\ D) Colloids are homogeneous mixtures\ E) Solutions are always opaque **75. Which of the following is NOT an example of a colloid?**\ A) Blood\ B) Gelatin\ C) Air\ D) Fog\ E) Paint **76. What property allows colloids to remain dispersed in a solvent?**\ A) Electrostatic repulsion\ B) Large particle size\ C) High density\ D) Chemical reactivity\ E) High surface tension **77. How does an emulsifier stabilize a colloid?**\ A) By preventing aggregation\ B) By reducing solubility\ C) By increasing particle size\ D) By decreasing temperature\ E) By neutralizing charges **78. Which type of colloid consists of liquid droplets dispersed in another liquid?**\ A) Emulsion\ B) Aerosol\ C) Gel\ D) Foam\ E) Suspension **79. What is the main reason hydrophobic colloids need stabilization?**\ A) They tend to aggregate in water\ B) They dissolve easily\ C) They form true solutions\ D) They repel solvents\ E) They are highly volatile **80. What is the purpose of the Van't Hoff factor in colligative property calculations?**\ A) To account for solute dissociation\ B) To determine solubility\ C) To measure boiling point\ D) To adjust pH\ E) To increase solute reactivity