Evaporation
Evaporation: Overview
This Topic covers sub-topics such as Evaporation, Factors Affecting Evaporation, Cooling Effect of Evaporation, Role of Temperature in Evaporation, Role of Humidity in Air in Evaporation and, Role of Surface Area in Evaporation
Important Questions on Evaporation
Why do we see water droplets on the outer surface of glass in cold water?
Cotton clothes are comfortable to wear in summers. Which feature of cotton explains why cotton is comfortable to wear in summers? Circle ‘Yes’ or ‘No’ for each row.
| Why cotton is comfortable to wear in summers? | Yes or No |
| Cotton has strong fibres. | Yes/No |
| Cotton is a natural fabric. | Yes/No |
| Cotton absorbs water and has pores. | Yes/No |
Why do volatile substances give a cooling sensation?
Why are places near the sea very humid?
What is the presence of water vapour in the atmosphere?
_____ is the process where water vapour becomes liquid.
State why do we see water droplets on the outer surface of the glass?
How will you prove that water vapour is present in the air?
Solid carbon dioxide is called _____.
Distinguish between evaporation and melting.
Evaporation occurs only on the surface of water.
State one similarity and difference between evaporation and boiling.
Account for the following:
It takes more time for the clothes to dry in monsoon than in the dry season.
During evaporation, particles of liquid change into vapours only
Which of the following factors does not increase the rate of evaporation?
Dogs generally hang out their tongue in summer.
Explain how the rate of evaporation of a liquid is affected with increase in wind speed.
Explain how the rate of evaporation of a liquid is affected with increase in moisture in the surrounding air.
Explain how the rate of evaporation of a liquid is affected with increase in exposed surface area.
Explain how the rate of evaporation of a liquid is affected by a decrease in the temperature of the liquid.
