Question

On what factors does evaporation of a liquid depend?

• A. The velocity of the wind
• B. The temperature of the surroundings
• C. The surface area of liquid exposed
• D. The humidity of the surroundings

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A The velocity of the wind
B The temperature of the surroundings
C The surface area of liquid exposed
D The humidity of the surroundings

Following are the factors on which velocity of wind depends:

1. Velocity of wind :- It is a common observation that clothes dry faster on a windy day. With the increase in wind speed; the particles of water vapour move away with the wind, decreasing the water vapour in surrounding.
2. Temperature of surrounding :- With the increase in temperature of surrounding, more number of particles get enough Kinetic Energy to go into the vapour state.
3. Surface area of liquid exposed :- Evaporation is a surface phenomenon. If the surface area is increased, the rate of evaporation increases. For example, while putting clothes for drying up we spread them out.
4. Humidity of surrounding :- Humidity is the amount of water vapour present in the atmosphere. The air around us cannot hold more than a definite amount of water vapour at a given temperature. If the amount of water in air is already high, the rate of evaporation decreases.