Question

Mixture of common salt and water can be separated completely by the process of :

• A. evaporation
• B. distillation
• C. filtration
• D. dissolving in more water

Answer 1

The correct option is A

evaporation

Explanation for correct option:

(a) Evaporation

1. The process of separating any substance from its solution by removing water is called evaporation.
2. When common salt is dissolved in water a homogenous mixture is formed.
3. This homogenous mixture is a true solution that on evaporation gives the solute i.e., common salt back.

Explanation for incorrect options:

(b) Distillation

1. Distillation is used to separate two miscible liquids that cannot be separated physically.
2. For example, It is used to separate acetone from the solution of acetone and water.

(c) Filtration

1. Filtration is mainly used to separate a suspension, the solute will remain above the paper and filtrate comes out.
2. It is used to separate insoluble solids in a liquid.
3. For example, it is used to separate sand from the mixture of sand and water.

(d) Dissolving in more water

Dissolving in more water is not a process of separation, hence cannot be used to separate common salt and water.

Hence, option (a) is the correct option.