Question

D. Answer the following questions in brief. 1. Name any three methods used for separating a solid-solid mixture. 2. What is winnowing? Give an example of a mixture whose components can be separated by this method. 3. Some iron pins get scattered on the carpet when you are expecting guests. How can one collect all the pins in the shortest possible time? 4. Name any three substances which sublime on heating. 5. What is crystallisation? Name any three substances which can be purified using this technique.​

Answer 1

Answer:

1. Name any three methods used for separating a solid solid mixture Ans-hand picking, threshing, sublimation.

2.Winnowing is the simple method of cleaning food materials from a mixture. Winnowing separate the grain from the husk because one particle is light and the other is heavy . ... This is process is known as winnowing. Examples are paddy (rice) and wheat .