Latent Heat of Water

Q.

Name two factors which increase the rate of evaporation.

Q.

When the surface area is increased, the rate of evaporation

1. increases

2. decreases

3. remains same

4. first decreases and then increases

Q.

The process where only the exposed surface of the liquid changes to gas is called _________.

Q.

A surface phenomenon.

Q.

Identify the true statements regarding evaporation from the following:
(i) Rate of evaporation increases with humidity.
(ii) Evaporation is a surface phenomenon.
(iii) Evaporation results in a decrease in the temperature of the surroundings.
(iv) Rate of evaporation is independent of external pressure.

1. (i) and (iii)

2. (ii) and (iv)

3. (ii) and (iii)

4. (i) and (iv)

Q.

Describe the factors which affect evaporation

Q.

Evaporation takes place at

1. Boiling point

2. Freezing point

3. Any temperature

4. None of these