Question

2. Observe any five activities in your surroundings in which separation of substances is required
and mention their utility in day to day life.​

Answer 1

Answer:

Sedimentation, Decantation, and Filtration

Answer 2

Explanation:

Some of the five activities which is using for separating substances in the surroundings as follows:

Hand picking:

• Handpicking in which substances can be separated in a blend by simply taking them out by hand.
• This technique can be used to separate slightly bigger parts of dirt, stones and husk from the grains as the amount of such impurities is not generally very big.

Threshing:

• This method is used to separate grain from stalks, a farmer utilizes  this separation technique to collect the granules from stalks.

Winnowing:

• Winnowing is used to distinguish lighter blend parts from heavier wind parts.
• Mainly Farmers are used this separation method to separate granules from lighter husk particles .

Sieving:

• It is primarily used in a flour mill to separate impurities from wheat prior to grinding.  

Sedimentation:

• If we separate the heavier particles in the solution then the solution is placed in the container for some time.
• After some moment, the heavier impurities in water settle down at the bottom of the container.

• But this method is not useful for the lighter particles.

Filtration:

• In this method using a filter paper to separate impurity particles from water.