Question

Q1.
(i) How can we obtain cream from milk?
(ii) State the principle involved.
(iii) Explain the technique used.
(iv) List any two applications of this technique.​

Answer 1

Answer:

1.

When the centrifuge machine is switched on, the milk is rotated (or spun) at a very high speed in its container. The centrifugal force acts on the milk and due to this, the milkseparates into cream and skimmedmilk. The cream, being lighter, floats over the skimmed milk and can the

n be removed

2.The principle is that the denser particles are forced to the bottom and the lighter particles stay at the top when spun rapidly. It is used toseparate cream from milk or butter from cream, squeeze out water from clothes, to separate colloidal particles from their solutions.

3.The process of centrifugation is usedin dairies to separate cream from milk. Centrifugation is a method for separating the suspended particles of a substance from a liquid in which the mixture is rotated at a high speed in a centrifuge machine. The milk is put in a closed container in big centrifuge machine 

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Answer 2

Answer:

Hey dear....Here is ur answer...

Explanation:

(i)Milk is put in a centrifuge machine and rotated n so the cream separates the milk.

(ii)The centrifuge works with the help of the sedimentation principle.

(iii)First milk is put in a centrifugal machine and then put it on and rotated it.Then while the rotation process is going on,you will see the milk separating the cream from itself.(iv)•It is used in dairies

•It is used in washing machines.

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