WorksheetsCh 7 Review
Total questions: 10
Worksheet time: 10mins
The molecules in a gas phase will
speed up upon heating the gas.
slow down upon heating the gas.
change phase upon sufficient heating of the gas.
form a condensed phase upon sufficient heating.
Condensation occurs when
the temperature of a substance is adjusted to its melting point.
the kinetic energy of the molecules is not sufficient to overcome intermolecular attractions.
the molecules are moving in random directions.
the kinetic energy of the molecules is sufficient to overcome intermolecular attractions.
A difference between the solid phase and the other two phases of a pure substance is
only the solid phase has molecules in fixed positions.
only the solid phase can experience melting.
only the solid phase is at or below the freezing point of the substance.
all of the above are correct.
Which of the following statements is true regarding London forces?
They are present only in the gas phase.
They are present only in the liquid phase.
They are present only in the solid phase.
They are present in all phases of matter.
Which of the following statements is true regarding London forces?
They have nothing to do with the electrons in a molecule.
They get smaller as the number of electrons in a molecule increases.
They get larger as the number of electrons in a molecule increases.
They get larger as the electrons get closer to the nucleus.
Which of the following statements is true regarding London forces?
They are due primarily to valence electrons.
They can never be stronger than dipolar attractions.
They can be quite strong for molecules that possess many electrons.
All of the above.
Hydrogen bonding is
the name given to the chemical bond in the H-H or H2 molecule.
a particularly strong type of dipolar interaction.
as strong as a chemical bond.
when hydrogen bonds to any other element.
A hydrogen bond between molecules can occur
only if the molecules involved are nonpolar.
only if the molecules possess a hydrogen atom bound to O, N, or F.
only if full charges develop on the atoms instead of partial charges.
only in the absence of dispersion forces.
A network solid is
the easiest of solids to melt.
made up of ions bound to one another via ionic bonds.
made up of molecules attracted to one another.
made up of atoms covalently bound to one another.
A condensed phase is
a shortened (condensed) version of a substance.
the gas form of a substance.
the liquid and solid forms of a substance.
formed by evaporation.
