Question

why is curd and butter separated by centrifugation​

Answer 1

centrifugation is the process in which lighter substance comes upward and heavy substance comes down
which came to be easy to separate butter and curd.

Answer 2

The principle involved in centrifugation is that the denser particles are forced to the bottom and the lighter particles stay at the top when spun rapidly. A milk churner used in the kitchen works on the same principle.

Centrifugation of a solid-liquid mixture depends on: (i) the density of the particles (ii) viscosity of the medium and (iii) the speed of rotation.

The machine used for centrifugation is called a 'centrifuge'. It consists of a test tube holder called rotor.

Take milk in test tube fix the test tube to the tesdt tube holder.On rapid rotation of the rotor, a centrifugal force develops and forces the more denser(milk) particles to settle at the bottom of the tube while less denser particles (butter)at the top.