Question

If $1L$ water is kept in 5 different bowls, arrange them in the increasing order of rate of evaporation.

• A. Surface area = $50m^2$
• B. Surface area = $150m^2$
• C. Surface area = $250m^2$
• D. Surface area = $300m^2$
• E. Surface area = $350m^2$
  

Answer 1

Rate of evaporation is directly proportional to change in surface area. If the surface area is increased, then the amount of liquid exposed to atmosphere also increases. Hence, the rate of evaporation is in order of $50m^2$ < $150m^2$ < $250m^2$ < $300m^2$ < $350m^2$.