Quiz 06 Intermolecular Forces Question 1 10 out of 10 points The vapor pressure of a liquid increases exponentially with increasing temperature chiefly because Selected Answer b The fraction of high e.
Quiz 06 - Intermolecular Forces Question 10 out of 10 points The vapor pressure of a liquid increases exponentially with increasing temperature chiefly because: Selected Answer: Answers: b The fraction of high energy molecules increases much faster than the average energy a The strength of the intermolecular forces increases b The fraction of high energy molecules increases much faster than the average energy c The average molecular mass increases d Atmospheric pressure increases Question 10 out of 10 points Which interaction is that? Selected Answer: Answers: d A&B a Hydrogen bonding b Dipole - dipole interaction c Dipole – induced dipole interaction d A&B Question out of 10 points Which one of the following substances will have hydrogen bonding as one of its intermolecular forces? Selected Answer: A Answers: c a D b C c A d B Question out of 10 points Which of the following substances, C2H6, CH3OH, CH3CONH2 exhibits H bonding? Selected Answer: Answers: c C2H6, CH3OH, CH3CONH2 a C2H6, CH3OH b C2H6 c C2H6, CH3OH, CH3CONH2 d CH3OH, CH3CONH2 Question 10 out of 10 points Which interaction is that? Selected Answer: Answers: c Dipole - dipole interaction a Dispersion interaction b Ionic - dipole interaction c Dipole - dipole interaction d Dipole – induced dipole interaction Question out of 10 points Which of the following statements is TRUE? Dipole-dipole forces have a greater energy than dipole-induced dipole forces Dipole-induced dipole forces have a greater energy than ion-induced dipole forces Hydrogen bonding is responsible for the relatively low boiling point of water Hydrogen bonding helps explain why solid water floats on liquid water Selected Answer: Answers: c Only a 1,3 b All of them c Only d 1,4 e None of them f 2,3 Question 10 out of 10 points Intramolecular forces exist _ each molecule, while intermolecular forces exist _ the molecules As a result, intramolecular forces are relative _, whereas intermolecular forces are relative _ Selected Answer: Answers: c within, between, strong, weak a between, within, weak, strong b between, within, strong, weak c within, between, strong, weak d within, between, weak, strong Question 10 out of 10 points Which intermolecular attractions are in order from weakest to strongest? Selected Answer: Answers: d London Dispersion < Hydrogen Bonding < Ion-dipole < Ionic Bonding a London Dispersion < Ion-dipole < Hydrogen Bonding < Ionic Bonding b Hydrogen Bonding < London Dispersion < Ion-dipole < Ionic Bonding c Ion-dipole < London Dispersion < Ionic Bonding < Hydrogen Bonding d London Dispersion < Hydrogen Bonding < Ion-dipole < Ionic Bonding Question 10 out of 10 points Why does boiling point of water become higher when salt is added? Selected Answer: b When salt is added, ionic – dipole interaction is formed, this interaction is stronger than intrisic interaction in water As a result, boiling point increases Answers: a None of them b When salt is added, ionic – dipole interaction is formed, this interaction is stronger than intrisic interaction in water As a result, boiling point increases c When salt is added, dipole – induced dipole interaction is formed, this interaction is stronger than intrisic interaction in water As a result, boiling point increases d When salt is added, dipole – dipole interaction is formed, this interaction is stronger than intrisic interaction in water As a result, boiling point increases Question 10 10 out of 10 points Given CCl4 and CS2, which one has higher boiling point? Why? Selected Answer: a CCl4, because CCl4 is more polar Answers: a CCl4, because CCl4 is more polar b CS2, because CS2 has hydrogen bonds c CCl4, because CCl4 is less polar d CS2, because CS2 is less polar Question 11 10 out of 10 points Fill in the blanks about intermolecular forces Ionic Polar Ionic x [A] Polar Ion-dipole [B] Non-polar Ion – induced dipole [C] Non-polar [D] [E] [F] o Questi on A Correct Match A Ion-dipole B F Dipole - dipole C G Dipole – induced dipole Selected Match A Ion-dipole F Dipole - dipole G Dipole – induced dipole D C C Ion – induced dipole E Ion – induced dipole B B Dipole – induced dipole F Dipole – induced dipole E E Induced dipole – induced dipole Induced dipole – induced dipole o All Answer Choices A Ion-dipole B Dipole – induced dipole C Ion – induced dipole D Ion-Ion E Induced dipole – induced dipole F Dipole - dipole G Dipole – induced dipole o Question 12 10 out of 10 points + - blanks dissolves in water, aqueous Na and Cl ions result The force of attraction that exists between Na+ and H2O is called a(n) interaction Selected Answer: a ion-dipole Answers: a ion-dipole b dipole-dipole c ion-ion d hydrogen bonding Question 13 Which force affects the boiling point, and melting point? 10 out of 10 points Selected Answer: a Intermolecular interaction Answers: a Intermolecular interaction b Metallic interaction c Intramolecular bond d None of above Question 14 10 out of 10 points Based on the following information: o CF4, Molecular Weight: 87.99, Normal Boiling Point: -182°C o CCl4, Molecular Weight: 153.8, Normal Boiling Point: -123°C Which of the above substances would have the higher equilibrium vapor pressure assuming that both substances are in the liquid state at the same temperature? Selected Answer: a CF4 Answers: a CF4 b CF4 and CCl4 would have the same vapor pressure c Impossible to determine from the information given d CCl4 Question 15 out of 10 points Which interaction helps ionic compounds dissolve in polar solution? Selected Answer: Answers: d Ionic - induced dipole interaction a Dipole - dipole interaction b Dispersion interaction c Ionic - dipole interaction d Ionic - induced dipole interaction Quiz 07 - Gases and Their Properties Question 10 out of 10 points What volume of CH4 at 0°C and 1.00 atm contains the same number of molecules as 0.50 L of N2 measured at 27°C and 0.50 atm? Selected Answer: c 0.23 L Answers: a 0.68 L b 0.46 L c 0.23 L d 0.92 L Question out of 10 points Why cannot Ideal Gas Law be applied when the pressure is high and temperature is low? Selected Answer: Answers: a For high pressure, the gas particles get to be far to each other and the interactions between them can not be ignored; while for an ideal gas, we assume that there is no interaction between those particles When the temperature is too high, the phrase transition will take place a For high pressure, the gas particles get to be far to each other and the interactions between them can not be ignored; while for an ideal gas, we assume that there is no interaction between those particles When the temperature is too high, the phrase transition will take place b For high pressure, the gas particles get to be close to each other and the interactions between them can not be ignored; while for an ideal gas, we assume that there is no interaction between those particles When the temperature is too low, the phrase transition will take place c For high pressure, the gas particles get to be close to each other and the interactions between them can be ignored; while for an ideal gas, we assume that there is no interaction between those particles When the temperature is too low, the phrase transition will take place d For high pressure, the gas particles get to be far to each other and the interactions between them can not be ignored; while for an ideal gas, we assume that there is no interaction between those particles When the temperature is too low, the phrase transition will take place Question 10 out of 10 points If the volume of a confined gas is doubled while the temperature remains constant, what change (if any) would be observed in the pressure? Selected Answer: a It would be half as large Answers: a It would be half as large b It would double c It would be four times as large d It would be 1/4 as large e It would remain the same Question 10 out of 10 points At what temperature will 41.6 grams N2 exerts a pressure of 815 torr in a 20.0 L cylinder? Selected Answer: Answers: e 176 K a 337 K b 134 K c 238 K d 400 K e 176 K Question 10 out of 10 points Calculate the missing variable V1=150 L, T1=180 K, V2=57.0 L, T2=? Selected Answer: Answers: c 68.4 K a 68.4 oC b 68.5 K c 68.4 K d 68.5 oC Question 10 out of 10 points Which of the following statements is FALSE? Selected Answer: Answers: e Solid water (ice), unlike most substances, is denser than its liquid form (water) a Gases completely fill any container they occupy and are easily compressed b Vapor refers to a gas formed by evaporation of a liquid or sublimation of a solid c Condensed states have much higher densities than gases d Molecules are very far apart in gases and closer together in liquids and solids e Solid water (ice), unlike most substances, is denser than its liquid form (water) Question 10 out of 10 points Major components in air Selected Answer: Answers: b N 2, O a O 2,