Factors Affecting Evaporation

Q.

Explain why in hot summer days water remains cool in earthen pots.

Q.

The rate of evaporation increases with__.

1. Increase of surface area.

2. Increase of temperature.

3. An increase in wind speed.

4. All the options are correct.

Q.

Evaporation increases with increase in humidity.

1. True

2. False

Q.

Why are volatile liquids such as alcohol and spirit stored in tightly closed bottles?

Q.

State three factors which affect the rate of evaporation of a liquid.

Q.

Water in a dish evaporates faster than in a bottle. Give reason.

Q.

In which of the following state of matter diffusion of particles is not possible.

1. solid

2. liquid

3. gas

4. none of these

Q. Humidity is the amount of __________ present in the air.

1. oxygen
2. nitrogen
3. water vapour
4. carbon dioxide

Q. Assertion [A]: A brick has a definite shape.
Reason [R]: Solids have strong intermolecular force of attraction between their particles.

1. Both [A] and [R] are correct
2. Both [A] and [R] are incorrect
3. [A] is incorrect, but [R] is correct
4. [A] is correct, but [R] is incorrect

Q.

Q.

When an impurity is added to a liquid, the boiling point of the liquid

1. remains unchanged

2. rises

3. falls

4. may rise or fall

Q.

Which of the following statement is wrong?

1. Evaporation leads to cooling

2. Evaporation occurs below boiling point

3. Rate of evaporation increases with increase in humidity

4. Evaporation increases with increase in surface area

Q. The process by which a solid directly converts into its gaseous state is known as ______.

1. vaporisation
2. deposition
3. evaporation
4. sublimation

Q. Solids resist change in its _______ and ______.

1. shape, colour
2. volume, temperature
3. temperature, shape
4. shape, volume

Q.

Please explain ebullition and how is vaporization different from evaporation

Q.

In which case evaporation of water will be faster i.e. near the sea or far away from a sea?

1. Near the sea

2. Away from the sea

3. In the middle of the sea.

4. Evaporation does not depend upon distance from sea.

Q. Make a comparison between boiling and evaporation?

Q.

Question 10:

How is evaporation different from boiling?

Q. The evaporation of a liquid would be fastest in:

1. 
2. 
3. 
4. 

Q.

The amount of water vapour present in air is known as ___

Q.

Which of the following does not affect the rate of evaporation?

1. Temperature

2. Wind speed

3. Surface area

4. Gravitation

Q. Solids resist change in its _______ and ______.

1. shape, colour
2. shape, volume
3. temperature, shape
4. volume, temperature

Q.

Rate of evaporation increases with:

1. Increase of surface area.

2. Increase of temperature.

3. An increase in wind speed.

4. All the options are correct.

Q.

In which case evaporation of water will be faster?

1. Away from the sea

2. In the middle of the sea.

3. Evaporation does not depend upon distance from sea.

4. Near the sea

Q.

Choose the incorrect statement.

1. All liquids have their boiling point at ${100}^o$C

2. Liquids can be converted to solid state below their freezing point.

3. Washing clothes is a slow change.

4. Evaporation can occur at any temperature.

Q. As temperature increases, the rate of diffusion _____.

1. remains same
2. decreases
3. increases and then decreases
4. increases

Q. Solids are generally. They have a definite shape and.

1. volume
2. hard
3. flowy
4. soft

Q. As temperature increases, the rate of diffusion _____.

1. decreases
2. increases and then decreases
3. increases
4. remains same

Q. An equal amount of water is kept in a cup and saucer. It evaporates faster from the saucer due to the difference in the _________.

1. humidity
2. surface area
3. temperature
4. wind speed

Q.

Question 10:

How is evaporation different from boiling?