Delhi Police Constable Exam Model Paper 1

Centrifugation

• Sometimes the solid particles in a liquid are very small and pass through a filter paper.
• For such particles, the filtration technique cannot be used for separation and such mixtures are separated by centrifugation.
• The principle is that the denser particles are forced to the bottom and the lighter particles stay at the top when spun rapidly.
• This technique is used for preparing skimmed milk