State the principle involved in separation of solid-liquid mixtures by – 

(a) sedimentation and decantation 

(b) filtration 

(c) evaporation

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1 Answers

(a) Sedimentation and decantation — 

Principle — The solid component is insoluble and heavier than the liquid component. 

Example — Mixture of sand and water 

(b) Filtration — 

Principle — Seperation of insoluble solid component by passing through a porous material like filter paper. 

Example — Mixture of chalk and water, Mixture of Agcl and Water. 

(c) Evaporation — 

Principle — Seperation of the mixture by evaporating the liquid component. The solid should be soluble in the liquid and should not sublime.

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