Question

a) Chalk powder from salt
b) Oil from water
O
c) Bran from flour
O d) Sand from water
Clear selection
1 point
4(B) The principle behind the above method is
O
a) separation based on colour
b) separation based on weight
c) separation based on size
d) separation based on solubility
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Answer 1

Answer:

There are many instances when we notice a substance being separated from a mixture of materials.

Tea leaves are separated from the liquid with a strainer, while preparing tea (Fig. 5.1).

Fig. 5.1 Separating tea leaves with a strainer

Grain is separated from stalks, while harvesting. Milk or curd is churned to separate the butter (Fig. 5.2). As we learned in Chapter 3, we gin cotton to separate its seeds from the fibre.

Perhaps you might have eaten salted daliya or poha. If you found that it had chillies in it, you may have carefully taken them out before eating.