Question

2 Do as directed.

(A) Here is the procedure for separation of substances. (3)

1) Which of the following methods are used for separation of substances?

a) Remove pebbles from the sand.​

Answer 1

Answer:

1. Why do we need to separate different components of a mixture? Give two examples.

Answer.

We need to separate different components of a mixture to separate the useful components from the non-useful or some harmful components.

Examples:

(a) Tea leaves are separated from tea.

(b) Pebbles are separated form rice and pulse.

2. What is winnowing? Where is it used?

Answer.

Winnowing: The process of separating heavier and lighter components of a mixture by wind or by blowing air is called winnowing.

Answer 2

we will using seaving a large sieve like this ....