8.We can separate the constituent of a mixture without involving any chemical changes.
Sieving
Mixture of particles with different size such as sand and pebbles mixture can separated through sieving.
Magnetic separation
Mixture of material and non-magnetic material can be separated by using magnets.
Distillation
This method involved the separation of liquid of different boiling temperature. For example, mixture of alcohol and water.
Filtralion
Insoluble substances can be separated from liquid of through filtration, for example, separating insoluble of alcohol and water.
Evaporation
Salt from the sea can be separated from the sea water through evaporation.