(i) Butter can be separated from curd by the process of Centrifugation. The principle behind this process is that the denser particles are forced to the bottom and the lighter particles stay at the top when spun rapidly.

(ii) Salt can be separated from seawater by the process of Evaporation. Seawater is boiled or evaporated. After evaporation salt is left behind.

(iii) Camphor can be separated from salt by the process of sublimation. This mixture is heated and camphor being the volatile component is separated in the form of vapours.