Question

Which of the following does not affect the rate of evaporation?
A. Wind speed
B. Temperature
C. Surface area
D. Insoluble heavy impurities

Answer 1

The evaporation is a process of converting the liquid into vapor state. Evaporation is a surface phenomenon. There are a lot of factors which are going to affect the rate of evaporation of the liquid or the solvent.
Complete step by step answer:
- In the question it is asked to find the option among the given options which does not affect the rate of evaporation.
- Coming to the given options, option A, Wind speed. As the wind speed increases the rate of evaporation also increases, because the wind is going to carry the vapor which is formed. Therefore the wind speed is going to affect the rate of evaporation.
- Therefore option A is incorrect.
- Coming to option B, Temperature. As the temperature increases the rate of evaporation also increases due to the absorption of the more heat. Therefore temperature is going to affect the rate of evaporation.
- Therefore option B is incorrect.
- Coming to option C, Surface area. As the surface area increases the rate of evaporation increases because the exposure of the liquid is going to increase with the environment by increasing the surface area.
- Therefore option A is incorrect.
- Coming to option D, Insoluble heavy impurities. Insoluble compounds are not going to affect the rate of the evaporation.
Therefore option D is the correct option.

Note: The insoluble impurities are going to stay in the solution and do not affect the process of the evaporation of the solvent from the solution. Therefore temperature, surface area and wind speed are going to affect the evaporation process.