Quiz on application of cooling by evaporation for grade 11

Wind affects boiling

• Yes

• No

• I don't know

How does pressure affect boiling point of a liquid?

• Pressure increases the boiling point

• Pressure reduces the boiling point

• Pressure does not affect the boiling point

According to Boyle's law,

• Volume is directly proportional to pressure when the temperature is constant

• Volume is inversely proportional to pressure when the temperature is constant

• Volume is proportional to temperature when the pressure is constant

What happens when the pressure of a given mass of gas is doubled at constant temperature

• The volume doubles

• The volume is halved

• The volume remains the same

What is the effect of impurities on boiling point of a liquid

• It lowers the boiling point

• It increases the boiling point

• It does not have any effect on the boiling point

What is latent heat?

• Latent heat is the heat supplied or removed that will change the state of a body without an increase in temperature

• Latent heat is the supplied or removed that will increase the temperature of a substance

• Latent heat is the heat supplied or removed from a body that will cause the state of the body to change

Why is the freezing compartment up in the fridge?

• To make the substance inside the fridge cool

• To allow cold air from the freezing chamber sink

• To allow hot air sink from the freezing chamber sink

What is sublimation?

• Change from solid to vapour

• Change from vapour to solid

• Change from liquid to vapour

What is saturated vapour?

• A saturated vapour is a vapour that is in contact with its own liquid within a confined space

• A saturated vapour is a vapour that is closed

• A saturated vapour is a vapour that is free

What is the boiling point?

• The boiling point of a liquid is the pressure at which the saturated vapour pressure equals the atmospheric pressure

• The boiling point of a liquid is the temperature at which the saturated vapour pressure equals the atmospheric pressure

• The boiling point of a liquid is the volume at which the saturated vapour pressure equals the atmospheric pressure