Question

Try segregating the things around you as pure substances and mixtures.

Answer 1

Pure substance:

• Pure substances are substances that are made up of only one kind of particle and have a fixed or constant structure.
• A substance can not be separated by any physical method.
• The composition of a pure substance is fixed.

Mixture:

• A mixture contains more than one substance (element or compound) mixed in any proportion.
• A mixture has a variable composition.

Some of the things around us that are pure substances and mixtures:

Pure substance	Mixture
Sugar	Air
Iron	Sugar solution
Salt	Soil
Diamond	Lemon juice
Gold	Steel