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I want to know answer for the questions given above.
This is from class 9
Chemistry , Chapter -2
Is Matter Around Us Pure
Activity 2.5.
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Answers
on churning the milk we observe that milk is separated from the substances present in it according to their density first with the cream . cream separated from the milk by method of centrifugation
Answer:
1) When milk is churned, the cream separates from the milk:
Explanation:
Centrifugal force separates the fat or cream from the milk. The cream floats above the milk because cream has low density as compared to milk. The milk left is skimmed milk.
Answer:
2) The process which is used to separate milk from cream is called centrifugation.
Explanation:
In this process, milk is rotated in a centrifugal machine which causes the dense particles to settle down in the machine while the lighter ones float up.
Cream is lighter than milk and so accumulates on top. The cream can thus be collected without disturbing milk below in the machine.
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