Which one of the following statements is not correct ?
The rate of evaporation depends on temperature
The rate of evaporation does not depend on surface area exposed to the atmosphere but on volume of the liquid
The rate of evaporation depends on humidity of the surroundings
The rate of evaporation depends on the wind speed
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CAPF – 2016
A) Temperature: Higher temperature increases the kinetic energy of liquid molecules, making it easier for them to escape the surface. (Correct statement)
B) Surface area exposed: A larger surface area allows more molecules to be at the surface and escape into the atmosphere per unit time, thus increasing the rate of evaporation. Volume of the liquid affects the total amount available for evaporation but not the instantaneous rate of evaporation at a given surface area. (Incorrect statement)
C) Humidity of the surroundings: Lower humidity means the air has a lower concentration of water vapor, creating a larger concentration gradient between the liquid surface and the air, leading to faster evaporation. (Correct statement)
D) Wind speed: Wind blows away the saturated air layer above the liquid surface, replacing it with drier air, which increases the rate of evaporation. (Correct statement)