Question

Explain the method that can be used for separating the following mixtures:
(i) Sand and husk
(ii) Wheat, sugar, and silk
(iii) Water and petrol
(iv) Rice and salt
(v) Sand and salt.

Answer 1

(i) Mixture of sand and husk: Sand and husk can be separated by the method of winnowing.

(ii) Mixture of wheat, sugar and silk: For separating silk from the mixture, we should follow the winnowing method because silk is lighter than the other two components and get separated. Wheat and sugar can be separated by sieving because their particles are of different sizes.

(iii) Mixture of water and petrol: Water does not dissolve in petrol. So, it can be separated by the use of separating funnel.

(iv) Mixture of rice and salt: Rice and salt can be separated by sieving.

(v) Mixture of sand and salt: Sand and salt is mixed with water, salt dissolves in water and sand can be separated by sedimentation and decantation followed by filtration. After that using evaporation, common salt is separated.