Question

Cream from the milk is separated by centrifugation because:

• A. cream is lighter than milk
• B. cream is heavier than milk
• C. cream floats over milk
• D. the cream is lighter than milk and comes over it

Answer 1

The correct option is D

the cream is lighter than milk and comes over it

Centrifugation works on the principle of density difference.
The cream has lower density compared to milk. Hence, it can be separated from milk due to centrifugal force. When the mixture is spun rapidly, the denser particles are forced to the bottom and the lighter particles stay on top. This way, cream can be collected in a seperate vessel.