Chemistry I - Practice Ch. 10 Gases & Ch. 11 Liquids & Solids

What property allows raindrops to form droplets and resist being broken apart by external forces?

• External resistance
• Internal tension
• Liquid cohesion
• Surface tension

For small molecules of comparable molecular weight, which one of the following choices lists the intermolecular forces in the order of increasing strength?

• a. hydrogen bonds < dipole–dipole forces < London forces
• b. dipole–dipole forces < hydrogen bonds < London forces
• c. London forces < hydrogen bonds < dipole–dipole forces
• d. London forces < dipole–dipole forces < hydrogen bonds

Which covalent compound will exhibit hydrogen bonding in the liquid state?

• a. CH2F2
• b. Cl2NH
• c. H2PCl
• d. HBr

The property that measures or describes the magnitude of resistance to flow in a liquid is called

• a. London forces.
• b. malleability.
• c. surface tension.
• d. vapor pressure.
• e. viscosity.

Which set of properties below is associated with ionic crystalline substances?

• a. broad range of melting points, soft to hard, conductors in liquid and solid states
• b. high melting point, brittle, nonconductor
• c. high melting point, hard, not brittle, nonconductor
• d. low melting point, soft, nonconductor
• e. low melting point, soft, conductor in liquid and solid states

Which set of properties below is associated with metallic substances?

• a. broad range of melting points, soft to hard, conductors in liquid and solid states
• b. high melting point, brittle, nonconductor
• c. high melting point, hard, not brittle, nonconductor
• d. low melting point, soft, nonconductor
• e. low melting point, soft, conductor in liquid and solid states

Paradichlorobenzene is a white crystalline solid which is very soft, has a low melting point, and is a nonconductor of electricity. Which category of substance does it most likely fit under?

• a. ionic
• b. molecular
• c. metallic
• d. covalent (network)
• e. amorphous

Silicon carbide, which has the empirical formula: SiC, melts at 2830 °C and is nearly as hard as boron nitride and diamond. Which category of substance does it most likely fit under?

• a. ionic
• b. molecular
• c. metallic
• d. covalent
• e. amorphous

What is the equation that describes the behavior of an ideal gas under varying conditions of pressure, volume, and temperature?

• The ideal gas law equation is PV = nT/R, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature.
• V = PnRT
• PV = nRT
• P = V/nRT

A U.S. Weather Bureau forecast cited the atmospheric pressure at sea level as having a value of 768.2 mm Hg. Expressed in kilopascals (kPa) wWhat would the value be? ( 1 atm = 101325 Pa = 760 torr = 760 mm Hg = 1.01325 bar = 1013.25 mb)

• 778.4 kPa
• 102.4 kPa
• 100.3 kPa
• 1024 kPa