1 Buckminsterfullerene is an allotrope of carbon that is: A A flat sheet B A giant covalent structure C A spherical molecule D An ionic compound
2 The conversion of a solid directly into a gas without passing through the liquid state is called: A Melting B Sublimation C Evaporation D Condensation
4 Which force is primarily responsible for the high boiling point of water? A London dispersion forces B Dipole-dipole forces C Hydrogen bonding D Ion-dipole forces
5 The allotropic form of carbon that is the hardest natural substance is: A Graphite B Diamond C Buckminsterfullerene D Charcoal
6 At what temperature does a liquid boil? A At its melting point B When its vapor pressure equals atmospheric pressure C At 0°C D When it freezes
8 The intermolecular force between a polar molecule and a nonpolar molecule is called: A Dipole-dipole force B Dipole-induced dipole force C Ion-dipole force D London dispersion force
9 Which of the following best explains why gases diffuse rapidly? A They have high density B They have weak intermolecular forces C They have strong intermolecular forces D They have a definite shape
10 The boiling point of a liquid is the temperature at which its vapor pressure becomes equal to: A Zero B Atmospheric pressure C Critical pressure D Osmotic pressure
11 Which of the following is a characteristic property of liquids? A Fixed shape B High compressibility C Definite volume D Rapid diffusion
12 Which of the following best describes the intermolecular force present between a polar molecule and a nonpolar molecule? A Dipole-dipole force B Dipole-induced dipole force C Ion-dipole force D London dispersion force
13 Which intermolecular force exists between a polar molecule and a nonpolar molecule? A Dipole-dipole forces B Dipole-induced dipole forces C London dispersion forces D Ion-dipole forces
14 The pressure exerted by the vapors of a liquid in equilibrium with its liquid at a given temperature is called: A Atmospheric pressure B Vapor pressure C Osmotic pressure D Partial pressure
15 Which property of gases allows them to spread out and mix with other gases? A Diffusion B Effusion C Compressibility D Density
16 Which type of intermolecular force is present between a polar molecule and a nonpolar molecule? A Dipole-dipole forces B Dipole-induced dipole forces C London dispersion forces D Hydrogen bonding
17 Which property of gases is responsible for the smell of ammonia spreading in a room? A Effusion B Diffusion C Compressibility D Density
18 Which of the following is a property of solids? A High compressibility B Definite shape and volume C Indefinite shape D High fluidity
19 Which property of gases is responsible for the smell of perfume spreading in a room? A Compressibility B Diffusion C Effusion D Density
20 What is the process of a solid changing directly into a gas called? A Melting B Sublimation C Evaporation D Condensation
21 The process of a liquid changing into a gas at its boiling point is called: A Evaporation B Condensation C Boiling D Sublimation
22 Which allotrope of carbon is composed of spherical molecules? A Diamond B Graphite C Buckminsterfullerene D Graphene
23 The density of a substance is defined as: A Mass per unit volume B Volume per unit mass C Mass per unit temperature D Volume per unit pressure
24 The process of a gas changing directly into a solid is called: A Sublimation B Deposition C Condensation D Evaporation
25 Which of the following statements about liquids is FALSE? A Liquids have a definite volume. B Liquids are highly compressible. C Liquids can evaporate. D Liquids have a definite boiling point at a given pressure.