INTERMOLECULAR

Liquids can form spherical elastic film to minimize surface area. What intermolecular force is responsible for the formation of this film in water?

• H-bonding

• ion-induced dipole

• dipole-induced dipole

• London dispersion force

The amount of energy required to stretch or increase the surface of a liquid by a unit area

• specific heat

• surface tension

• vapor pressure

• heat of vaporization

The ability of water molecules to move against gravity

• viscosity

• temperature

• surface tension

• capillary action

Substances like heavy syrup and molasses flow slowly than water. The ability of these substances to resist flow is known as

• viscosity

• pressure

• surface tension

• capillary action

The pressure exerted by the vapor due to evaporation of a liquid or a solid in a closed container

• boiling point

• capillary action

• surface tension

• vapor pressure

What is true about liquids with strong intermolecular forces?

• Vapor pressure is low

• Vapor pressure is high

• Viscosity tends to be low.

• Viscosity is immeasurable.

Which of the following occurs when the vapor pressure of a liquid becomes equal to the atmospheric pressure?

• boiling

• melting

• freezing

• condensing

The atmospheric pressure on top of a mountain is lower than at sea level. As a consequence, what will happen to the cooking time of an egg on top of the mountain?

• The egg will cook faster since the boiling temperature will be

  lower.

• The egg will cook at a shorter time since the boiling temperature will be higher

• The egg will cook at a longer time due to a lower boiling

  temperature

• The egg will cook at a shorter time due to higher boiling

  temperature.

Sodium chloride is completely soluble in water. What is responsible for its solubility in water?

• London dispersion forces in NaCl predominate leading to strong

  dipole interactions with water.

• The presence of charged ends in NaCl enables dipole-dipole

  interaction with water.

• The ions in NaCl participate in ion-induced dipole attractions with water

• Na+ and Cl- ions are favorable sites for H-bonding to form.

When does boiling occur?

• When the vapor pressure of a liquid is equal to atmospheric

  pressure

• When evaporation occurs at the same time with condensation

• When the rate of vaporization is equal to the rate of

  condensation.

• When the amount of vapor inside the container is equal to

  the amount of the liquid