Question

Write the technique of separation of a mixture by evaporation?

Answer 1

Evaporation:

• It is the process in which water evaporates from the liquid surface and is converted into a gaseous state ( water vapour) by the action of heat.
• It plays a very important role in the water cycle.
• The process of evaporation is used on large scale to obtain common salt from seawater.

Principle:

• In the evaporation, the liquid constituent of the mixture evaporates and leaves behind the solid constituent.

The technique of separation:

• In this technique, the liquid constituent of a mixture is allowed to evaporate by exposing it to air, sunlight, or by heating it.
• During this process, the liquid is lost to the atmosphere and the solid is left behind.