Separation of Substances Class 6 notes - Chapter 5

We all have seen our parents and grandparents separating small stones or pebbles from the rice grains, pulses, filtering tea leaves before serving tea and lot more. The practice of Separation of substances is usually required to remove or separate the required substances from their mixtures.

A substance can be classified into: Mixture and the pure substance.

What is a Mixture?

A mixture is defined as the substance made by the combination of two or more substances. Air, salt water, smog are a common example of a mixture.

What is a Pure Substance?

Pure Substance is defined as the substance in which each and every particle are same and unique. Distilled water is the best example of a pure substance.

Methods of Separation of Substances

There are different separation techniques used to separate a pure substance from a mixture. Listed below are few of them:

  • Handpicking, Sieving, Threshing, Winnowing and Combine harvester are different techniques mainly used for separating the solid substance from a solid mixture.
  • Condensation, Decantation, Evaporation, Filtration, and Sedimentation are mainly used for separating soluble and insoluble solids from a mixture of both solids and liquid.

Important Questions

  1. What is hand picking? List out its uses.
  2. Difference between Sieving and Filtration.
  3. How can we separate a mixture of milk and water?
  4. How can we separate salt from a mixture of salt water?
  5. What are the different separation techniques used to separate a pure substance from a mixture?

Learn more about separate a pure substance from the topics given below:


Practise This Question

The specific features which enable a plant or an animal to live in a particular habitat is called _____________.