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NCERT Class 6 Science Chapter 3 Separation of Substances

Last updated on September 17th, 2023 at 11:47 pm

  1. Threshing
  2. filtration
  3. evaporation
  4. sedimentation and decantation


True or false?

  1. A mixture of milk and water can be separated by filtration.
  2. A mixture of powdered salt and sugar can be separated by the process of winnowing.
  3. Separation of sugar from tea can be done with filtration.
  4. Grain and husk can be separated with the process of decantation.


  1. False
  2. False
  3. False
  4. False


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?

Ans. After adding and stirring sugar to the lemon juice, we should add ice. Because when the temperature of water/juice is high the sugar will dissolve faster. When you mix ice, it cools down and less sugar dissolves.


Class 6 Science Separation of Substances Extra Question Answers:-

[Q] Define Evaporation?

Ans. The process by which a liquid is converted into vapor is known as evaporation. To separate a solid dissolved in a liquid, evaporation can be used.


[Q] What are the different methods of separating substances?

Ans. Methods for separating substances from mixtures include handpicking, winnowing, sieving, sedimentation, decantation, and filtration.


[Q] Define Condensation.

Ans. Condensation is the process of converting water vapor into liquid form.


[Q] Name the method used to separate cream from curd?

Ans. Churning

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