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Match the following (a) Separating Salt and Camphor (i) Winnowing (b) Separating Salt and water (ii) Decantation (c) Separating husk from the grain (iii) Evaporation (d) Separating soil from water (iv) Sublimation

Match the following (a) Separating Salt and Camphor (i) Winnowing (b) Separating Salt and water (ii) Decantation (c) Separating husk from the grain (iii) Evaporation (d) Separating soil from water (iv) Sublimation Correct Answer (a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)

Concept:

Methods of Separation

Sublimation

  • Sublimation is a process in which solid changes into the gaseous state without passing through the liquid state.
  • Substances like camphor, naphthalene balls, etc, get converted directly into a gaseous form from solid to gas on heating. 
  • Two components of a mixture can be separated if one of them goes through sublimation on heating. 
  • When salt and camphor are heated in a flask, the camphor goes through sublimation. It can be obtained in condensed form. 

Sedimentation and Decantation:

  • These methods are used when one component is a liquid and the other is an insoluble solid, heavier than liquid, i.e. mud and water.
  • If muddy water (soil and water) is allowed to stand undisturbed for some time in a beaker, the particles of the earth (clay and sand) settle at the bottom. This process is called sedimentation.
  • The partially clear liquid at the top can be gently transferred into another beaker. This process is known as decantation.
  • The same principle is used for separating a mixture of two liquids that do not mix with each other.


Conclusion:

The following conclusion is based on the above discussion. 

(a) Separating Salt and Camphor

(iv) Sublimation

(b) Separating Salt and water

(iii) Evaporation

(c) Separating husk from the grain

(i) Winnowing

(d) Separating soil from water

(ii) Decantation

 

So, the correct option is (a) - (iv), (b) - (iii), (c) - (i), (d) - (ii).

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