Question

Explain the process of separation of substances with the use of more than one method with an example. (Evaporation and Condensation)​

Answer 1

Explanation:

We use more than one method to separate the same two substances. We can use both winnowing and handpicking to separate the husk from grains. But using both will remove all impurities. Therefore, all separation techniques are useful to the farmers.

Answer 2

Answer:

(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 other two components and get separated. Wheat and sugar can be separated by sieving because they are in 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 solution by sedimentation and decantation followed by filtration. After that using evaporation common salt is separated

EXPLANATION

Explain the method that can be used for separating the following mixture:

(i) Sand and husk

(ii) Wheat, sugar, and silk

(iii) Water and petrol

(iv) Rice and salt

(v) Sand and salt.

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