Chem 4 QuizGecko Set PDF

**1. Which is stronger: chemical bonds or intermolecular forces?** A. Chemical bonds\ B. Intermolecular forces\ C. Both are equally strong\ D. It depends on the type of bond **Answer:** A **2. What are the three types of intermolecular forces listed from weakest to strongest?** A. Hydrogen bondi...

**1. Which is stronger: chemical bonds or intermolecular forces?** A. Chemical bonds\ B. Intermolecular forces\ C. Both are equally strong\ D. It depends on the type of bond **Answer:** A **2. What are the three types of intermolecular forces listed from weakest to strongest?** A. Hydrogen bonding, London dispersion, dipole-dipole\ B. Dipole-dipole, hydrogen bonding, London dispersion\ C. London dispersion, dipole-dipole, hydrogen bonding\ D. Dipole-dipole, London dispersion, hydrogen bonding **Answer:** C **3. Which type of molecules exhibit London dispersion forces?** A. Only polar molecules\ B. Only nonpolar molecules\ C. All molecules\ D. Only molecules with hydrogen bonding **Answer:** C **4. How does molecular size affect dispersion forces?** A. Smaller molecules have greater dispersion forces.\ B. Larger molecules have greater dispersion forces.\ C. Molecular size does not affect dispersion forces.\ D. Dispersion forces only depend on shape. **Answer:** B **5. What is the effect of molecular shape on dispersion forces?** A. More compact shapes have greater dispersion forces.\ B. Irregular shapes have weaker dispersion forces.\ C. More compact shapes have weaker dispersion forces.\ D. Shape does not affect dispersion forces. **Answer:** C **6. Which molecules exhibit dipole-dipole forces?** A. Nonpolar molecules\ B. Polar molecules\ C. All molecules\ D. Only molecules with hydrogen bonds **Answer:** B **7. What is hydrogen bonding?** A. A type of chemical bond\ B. A special dipole-dipole interaction involving N-H, O-H, or F-H bonds\ C. A dispersion force between polar molecules\ D. A covalent bond involving hydrogen **Answer:** B **8. Which molecule does NOT exhibit hydrogen bonding?** A. CH3NH2\\text{CH}\_3\\text{NH}\_2CH3​NH2​\ B. H3CF\\text{H}\_3\\text{CF}H3​CF\ C. HF\\text{HF}HF\ D. CH3CH2OH\\text{CH}\_3\\text{CH}\_2\\text{OH}CH3​CH2​OH **Answer:** B **9. What is surface tension?** A. The energy required to decrease the surface area of a liquid\ B. The energy required to increase the surface area of a liquid\ C. The ability of a liquid to form a concave meniscus\ D. The ability of a liquid to adhere to surfaces **Answer:** B **10. What happens to surface tension as intermolecular forces increase?** A. Surface tension decreases\ B. Surface tension increases\ C. Surface tension remains the same\ D. Surface tension only depends on temperature **Answer:** B **11. What is capillary action?** A. The attraction between liquid molecules only\ B. The attraction between liquid molecules and tube walls\ C. The movement of liquid through a tube due to cohesive and adhesive forces\ D. The effect of gravity on liquid molecules **Answer:** C **12. What type of meniscus forms when cohesive forces are stronger?** A. Flat\ B. Convex (hill)\ C. Concave (valley)\ D. Cylindrical **Answer:** B **13. What is vapor pressure?** A. The pressure of gas molecules above the surface of a liquid\ B. The pressure needed to boil a liquid\ C. The temperature at which a liquid boils\ D. The pressure exerted by intermolecular forces **Answer:** A **14. How is vapor pressure related to boiling point?** A. Vapor pressure decreases as boiling point increases.\ B. A liquid boils when its vapor pressure equals atmospheric pressure.\ C. Vapor pressure is not related to boiling point.\ D. Boiling point decreases as vapor pressure increases. **Answer:** B **15. What happens to the boiling point of a liquid at high altitude?** A. It increases due to lower atmospheric pressure.\ B. It decreases due to lower atmospheric pressure.\ C. It stays the same as at sea level.\ D. It decreases due to higher atmospheric pressure. **Answer:** B **16. Which of the following decreases as intermolecular forces increase?** A. Vapor pressure\ B. Boiling point\ C. Enthalpy of vaporization\ D. Melting point **Answer:** A **17. Which of the following increases as intermolecular forces increase?** A. Vapor pressure\ B. Boiling point\ C. Gas-phase molecules\ D. Surface area **Answer:** B **18. What is a phase diagram?** A. A graph with pressure on the y-axis and temperature on the x-axis\ B. A graph with heat on the y-axis and temperature on the x-axis\ C. A graph showing the boiling point of liquids\ D. A graph showing heating and cooling cycles **Answer:** A **19. What is a heating curve?** A. A graph showing phase changes at constant pressure\ B. A graph showing temperature changes at constant pressure\ C. A graph showing pressure changes as temperature increases\ D. A graph showing the melting and boiling points of solids **Answer:** B **20. What are liquid crystals?** A. A state between solid and gas\ B. A state with both liquid and gas properties\ C. A state between liquid and solid, where molecules have solid organization but liquid properties\ D. A super-cooled liquid state **Answer:** C **21. Which of the following molecules will exhibit the strongest intermolecular forces?** A. CH4\\text{CH}\_4CH4​\ B. H2O\\text{H}\_2\\text{O}H2​O\ C. N2\\text{N}\_2N2​\ D. CO2\\text{CO}\_2CO2​ **Answer:** B **22. Which molecule exhibits dipole-dipole interactions but not hydrogen bonding?** A. HF\\text{HF}HF\ B. CH3CH2OH\\text{CH}\_3\\text{CH}\_2\\text{OH}CH3​CH2​OH\ C. HCl\\text{HCl}HCl\ D. CH4\\text{CH}\_4CH4​ **Answer:** C **23. What happens to dispersion forces as the shape of a molecule becomes more compact?** A. Dispersion forces increase.\ B. Dispersion forces decrease.\ C. Dispersion forces are unaffected by shape.\ D. Dispersion forces depend only on molecular size. **Answer:** B **24. How does boiling point change as intermolecular forces increase?** A. It decreases.\ B. It increases.\ C. It remains constant.\ D. It depends on molecular weight only. **Answer:** B **25. Why does H3CF\\text{H}\_3\\text{CF}H3​CF not exhibit hydrogen bonding?** A. It has no hydrogen atoms.\ B. It has no fluorine atoms.\ C. The hydrogen and fluorine atoms are not bonded together.\ D. It only exhibits dipole-dipole interactions. **Answer:** C ### **Boyle's Law** #### 1. What happens to the pressure (PPP) of a gas when the volume (VVV) is increased, while temperature is held constant? A. PPP increases\ B. PPP decreases\ C. PPP stays the same\ D. PPP fluctuates **Answer:** B #### 2. What happens to the pressure (PPP) when the volume (VVV) is decreased at constant temperature? A. PPP decreases\ B. PPP increases\ C. PPP remains constant\ D. PPP doubles **Answer:** B #### 3. Boyle's Law describes the relationship between which two variables? A. Volume and temperature\ B. Pressure and temperature\ C. Pressure and volume\ D. Number of particles and volume **Answer:** C #### 4. What is the mathematical equation for Boyle's Law? A. P1T1=P2T2P\_1T\_1 = P\_2T\_2P1​T1​=P2​T2​\ B. V1T1=V2T2V\_1T\_1 = V\_2T\_2V1​T1​=V2​T2​\ C. P1V1=P2V2P\_1V\_1 = P\_2V\_2P1​V1​=P2​V2​\ D. V1n1=V2n2V\_1n\_1 = V\_2n\_2V1​n1​=V2​n2​ **Answer:** C #### 5. Are pressure (PPP) and volume (VVV) directly or indirectly proportional according to Boyle's Law? A. Directly proportional\ B. Indirectly proportional\ C. Neither\ D. Sometimes directly, sometimes indirectly **Answer:** B ### **Charles' Law** #### 6. What happens to the volume (VVV) of a gas when the temperature (TTT) is increased, while pressure is held constant? A. VVV decreases\ B. VVV increases\ C. VVV stays constant\ D. VVV fluctuates **Answer:** B #### 7. What happens to the volume (VVV) when the temperature (TTT) is decreased at constant pressure? A. VVV increases\ B. VVV decreases\ C. VVV remains constant\ D. VVV doubles **Answer:** B #### 8. Charles' Law describes the relationship between which two variables? A. Volume and temperature\ B. Pressure and temperature\ C. Pressure and volume\ D. Number of particles and volume **Answer:** A #### 9. What is the mathematical equation for Charles' Law? A. P1T1=P2T2P\_1T\_1 = P\_2T\_2P1​T1​=P2​T2​\ B. V1T1=V2T2V\_1T\_1 = V\_2T\_2V1​T1​=V2​T2​\ C. P1V1=P2V2P\_1V\_1 = P\_2V\_2P1​V1​=P2​V2​\ D. V1n1=V2n2V\_1n\_1 = V\_2n\_2V1​n1​=V2​n2​ **Answer:** B #### 10. Are volume (VVV) and temperature (TTT) directly or indirectly proportional according to Charles' Law? A. Directly proportional\ B. Indirectly proportional\ C. Neither\ D. Sometimes directly, sometimes indirectly **Answer:** A ### **Gay-Lussac's Law** #### 11. What happens to the pressure (PPP) of a gas when the temperature (TTT) is increased, while volume is held constant? A. PPP decreases\ B. PPP increases\ C. PPP stays constant\ D. PPP fluctuates **Answer:** B #### 12. What happens to the pressure (PPP) when the temperature (TTT) is decreased at constant volume? A. PPP increases\ B. PPP decreases\ C. PPP remains constant\ D. PPP doubles **Answer:** B #### 13. Gay-Lussac's Law describes the relationship between which two variables? A. Volume and temperature\ B. Pressure and temperature\ C. Pressure and volume\ D. Number of particles and volume **Answer:** B #### 14. What is the mathematical equation for Gay-Lussac's Law? A. P1T1=P2T2P\_1T\_1 = P\_2T\_2P1​T1​=P2​T2​\ B. V1T1=V2T2V\_1T\_1 = V\_2T\_2V1​T1​=V2​T2​\ C. P1V1=P2V2P\_1V\_1 = P\_2V\_2P1​V1​=P2​V2​\ D. V1n1=V2n2V\_1n\_1 = V\_2n\_2V1​n1​=V2​n2​ **Answer:** A #### 15. Are pressure (PPP) and temperature (TTT) directly or indirectly proportional according to Gay-Lussac's Law? A. Directly proportional\ B. Indirectly proportional\ C. Neither\ D. Sometimes directly, sometimes indirectly **Answer:** A ### **Avogadro's Law** #### 16. What happens to the volume (VVV) of a gas when the number of particles (nnn) is increased, while pressure and temperature are held constant? A. VVV decreases\ B. VVV increases\ C. VVV stays constant\ D. VVV fluctuates **Answer:** B #### 17. Avogadro's Law describes the relationship between which two variables? A. Volume and temperature\ B. Volume and number of particles\ C. Pressure and temperature\ D. Pressure and volume **Answer:** B #### 18. What is the mathematical equation for Avogadro's Law? A. P1T1=P2T2P\_1T\_1 = P\_2T\_2P1​T1​=P2​T2​\ B. V1T1=V2T2V\_1T\_1 = V\_2T\_2V1​T1​=V2​T2​\ C. P1V1=P2V2P\_1V\_1 = P\_2V\_2P1​V1​=P2​V2​\ D. V1n1=V2n2V\_1n\_1 = V\_2n\_2V1​n1​=V2​n2​ **Answer:** D #### 19. Are volume (VVV) and the number of particles (nnn) directly or indirectly proportional according to Avogadro's Law? A. Directly proportional\ B. Indirectly proportional\ C. Neither\ D. Sometimes directly, sometimes indirectly **Answer:** A ### **Particle Behavior** #### 20. What happens to the speed of gas particles as temperature increases? A. Speed decreases\ B. Speed increases\ C. Speed remains constant\ D. Speed fluctuates **Answer:** B