Question

When is separation of substances necessary?​

Answer 1

Answer:

```Among different components of mixture there are many substances which are harmful or not useful for us. To remove these harmful or unuseful components we need to separate them. For example: (a) Tea leaves are separated from the liquid with a strainer while preparing tea```

Answer 2

Answer:

Taking out useful substances from a mixture is usually the main reason for separation of substances. Sometimes we need to separate the substance when we need to use different components in different ways. For example... Hand picking, winnowing etc.