Evaporation

Q. Lemonade is prepared by mixing lemon juice and sugar in water. You wish to add ice to cool it. Should you add ice to the lemonade before or after dissolving sugar ? In which case would it be possible to dissolve more sugar ?​ [3 marks]

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 water into its vapour is called as ___ .

Q. ________ is the process in which liquid water gets converted into vapour.

1. Evaporation
2. filtration
3. Decantation
4. Sedimentation

Q. Choose the incorrect statement related to the process of evaporation.

1. Evaporation occurs at any temperature.
2. Evaporation takes place within the liquid.
3. Temperature may change during evaporation.
4. No bubbles are formed in liquid during evaporation.

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

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

1. True
2. False

Q. Evaporation is the process by which water changes from a liquid to vapour on absorbing heat.

1. False
2. True

Q. Water can be converted to water vapour by heating it.

1. False
2. True

Q. The phenomenon which keeps water inside an earthen pot cool is .

1. evaporate
2. condense
3. precipitate
4. freeze