Evaporation

Q.

Explain the process involved in the water cycle?

Q.

You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?

Q.

The physical process of converting liquid to gas is called ___________________.

1. condensation

2. evaporation

3. sublimation

4. melting

Q.

Why gases are easily compressible? Give reason.

Q. Wet clothes dry fastest in which of the following seasons?

1. Winter
2. Summer
3. Rainy
4. Spring

Q. Which process is used to separate a soluble solid from a solution?

1. Filtration
2. Evaporation
3. Melting
4. Sieving

Q.

The process of conversion of water into its vapour is called as ______.

1. Freezing

2. Sedimentation

3. Decantation

4. Evaporation

Q.

The process of conversion of liquid to vapour is called__________.

1. Evaporation

2. Sublimation

3. Condensation

4. Boiling

Q.

When salt is mixed in water, it's level remains unchanged, why?

Q.

Question 14

Why do wet clothes placed on a clothes line dry after sometime? Explain.

Q. A mixture of salt and water can be separated by the process of .

1. sieving
2. handpicking
3. evaporation

Q.

when a solid dissolves in a liquid , the volume of the liquid _____________(changes/does not changes)

Q. To clean their spectals people often breathe out on glasses to make them wet explain why the glass became Wet ?

Q.

Dry ice is the solid form of carbon dioxide and is used as a refrigerant.

1. True

2. False

Q.

Question 3

Some changes are listed in the following table. For each change, write in the blank column, whether the change can be reversed or not.
$\begin{array}{ccc}\text{S.No.}& \text{Change}& \text{Can be reversed (Yes/No)}\\ 1.& \text{The sawing of a piece of wood}& \\ 2.& \text{The melting of ice candy}& \\ 3.& \text{Dissolving sugar in wateer}& \\ 4.& \text{The cooking of food}& \\ 5.& \text{The ripening of a mango}& \\ 6.& \text{Souring of milk}& \end{array}$

Q.

What Is the Principle of Evaporation?

Q. The steam rises from wet clothes on ironing due to ___________ of water.

1. condensation
2. sublimation
3. evaporation
4. decantation

Q. The circulation of water between ocean and land is called:

1. Evaporation
2. Condensation
3. Transpiration
4. Water Cycle

Q.

Explain the evaporation of liquid on the basis of kinetic theory.

Q. Explain the process of formation of clouds.

Q.

Condensation is the process of change of state from gas to liquid.

1. Change of state from liquid to gas.

2. Change of state from gas to liquid.

Q. The cycle of evaporation and condensation takes place continuously in nature.

1. True
   
2. False

Q.

Water vapour is present in the atmosphere only during monsoons.

1. True

2. False

Q. The water spilled on the floor disappears after sometime due to evaporation.

1. True
2. False

Q. The method that is used to obtain pure salt from impure salt is ___ .

Q.

This method is used to separate mixture whose components have different densities.

Q. Factor/factors affecting evaporation are
(a) surface area
(b) humidity and wind
(c) temperature
(d) all of these

Q. The process by which wet clothes dry outside in sunlight is known as ________.

1. evaporation
2. sublimation
3. condensation
4. sedimentation

Q.

Out of boiling and evaporation, which is a surface phenomenon ? Explain.

Q.

Question 15

Water kept in sunlight gets heat from the sun and is evaporated. But how does water kept under the shade of a tree also gets evaporated? Explain.