PT-317_Day-6_roll no-18601919076_topic name-Vapour pressure

When the atmospheric pressure equals the equilibrium vapor pressure ___ occurs

• freezing

• boiling

• melting

• sublimation

Tags

NGSS.MS-PS1-4

The vapor pressure of a solution containing a nonvolatile solute is directly proportional to the

• molality of the solvent

• osmotic pressure of the solute.

• molarity of the solvent

• mole fraction of solvent.

• mole fraction of solute.

Which of the four colligative properties arises in systems where there is an equilibrium between a liquid solution phase and a second liquid phase?

• Osmotic pressure

• Lowering of vapour pressure

• Raising of boiling point

• Lowering of melting point

Vapour pressure is measured by taking the difference in liquid pressure is

• glass pressure

• atmospheric pressure

• mercury pressure

• container pressure

Which of the following statement is true about vapor pressure of a liquid?

• Vapor pressure is closely related to molecular activity and temperature of the liquid

• Vapor pressure is closely related to molecular activity but independent of the temperature of the liquid

• Vapor pressure is not affected by molecular activity and temperature of the liquid

• Vapor pressure is not affected by molecular activity and is independent of the temperature of the liquid

A liquid evaporates first at which of the following conditions?

• High attraction forces

• Low attraction forces

• Low vapor pressure

• High boiling point

Tags

NGSS.HS-PS3-4

The strength of intermolecular forces varies between liquids, therefore they will have

• the same amount of kinetic energy

• different temperatures

• the same equilibrium vapor pressure

• different equilibrium vapor pressure

Tags

NGSS.HS-PS1-3

Liquids with weak intermolecular forces

• cannot diffuse

• easily evaporate

• contain a lot of kinetic energy

• freeze easily

Tags

NGSS.HS-PS3-4

A person living in Shimla observed that cooking of food without using pressure cooker takes more time. The reason for this observation is that at high altitude

• pressure increases

• pressure decreases

• temperature increases

• temperature decreases

Consider a water bottle containing water, water vapor, and air in equilibrium. If the temperature decreases slightly, _____.

• the amount of water vapor will increase and the vapor pressure will increase

• the amount of water vapor will increase and the vapor pressure will decrease

• the amount of water vapor will decrease and the vapor pressure will increase

• the amount of water vapor will decrease and the vapor pressure will decrease