• Mixtures are formed by mixing of 2 or more substances without chemical combination
  • These substances may be elements or compounds
  • A mixture has variable composition ; the ratio of 2 or more substances may not be same
  • A mixture shows properties of constituent substances  

 

Example : Sugar in Water is a mixture, Air is mixture of Oxygen, Nitrogen

Now,

  • Sugar in water is a mixture. We can add any amount of sugar in a glass of water, and call the resultant a mixture. 
  • The amount of either of the things doesn't matter.
  • The property of the mixture is the same as that of the constituents sugar and water.

Activity to Show Preparation (and Properties) of a Mixture

  • Take some Iron filings and Sand
  • Mix and crush them
  • Bring a magnet near the mixture
  • We see that Iron fillings get attracted to it

 

This means that it is a mixture as it still shows properties of Iron (to be attracted by a magnet)

Also, the mixture can be separated using physical methods like magnetic separation .

Separating iron filings from sand using a magnet - Teachoo.png

 

 

  1. Class 9
  2. Chapter 2 Class 9 - Is Matter Around Us Pure (Term 1)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo