Some properties are
-
They are formed by
mixing of 2 or more substances. (
These may be elements or compounds)
For example : Lemonade is made by mixing lemon juice, water and sugar.
-
The substances are
not chemically combined
in a mixture
For example: Let us consider the water and sugar in the lemonade. The molecules are merely present in the solution without forming bonds.
-
A mixture has
variable composition
(Ratio of 2 or more substances may not be the same)
For example: The amount of lemon extract, sugar, water can vary while making the lemonade. Though the ratio of ingredients varies, the mixture remains lemonade.
-
A mixture
shows properties of substances it is made up of
(
constituent substances)
For example : Sugar which is a sweet substance, and on being added to lemon juice.. it makes the mixture sweet
-
Different Elements of Mixtures can be
separated by Physical methods
(like Filtration, Sublimation, Evaporation etc.)
For Example : We can separate sugar from lemon water using Distillation
Example 1
- If we put salt in water , it is a mixture
- It does not form a new substance chemically.
- It is possible to separate salt from water by using physical methods like evaporation.
Example 2
- Air is a mixture of different gases like Oxygen, Carbon Dioxide, Nitrogen etc.
- It is possible to separate these different gases by using physical methods
