Question

A sample of milk is taken into a centrifuge to separate it into milk fat and skim milk.
Which of the following is correct based on the result of centrifugation of the sample milk?

• A. Top layer - Milk fat,
  Bottom layer - Skim milk
• B. Top layer - Skim milk,
  Bottom layer - Milk fat
• C. Top layer - Milk fat,
  Middle layer - Skim milk,
  Bottom layer - Milk fat
• D. Centrifugation has no effect on milk

Answer 1

The correct option is A Top layer - Milk fat,

Bottom layer - Skim milk
Centrifuge is a device which is used to separate a solid-liquid mixture based on density and particle size.
As the sample of milk is centrifuged in the centrifuge device, the sample rotates at a very high speed which separates components of milk into milk fat and skim milk. Milk fat being less dense than skim milk accumulates over the layer of skim milk.