Check sibling questions

Sublimation is used to separate a mixture of Solid and a Solid

What is Sublimation?

It is a process where a solid directly converts into its gas phase without going into liquid state .

 

Example

  • Solids like Ammonium chloride, Naphthalene,Camphor and Anthracene undergo Sublimation.
  • When we heat them they convert directly into gases without first converting into liquid

Hence, to separate a mixture having a sublimable and non-sublimable component , we use the method of sublimation.

 

How to Separate a Mixture of Salt and Camphor?

In a mixture of Salt and Camphor,

 

Camphor 

  • Sublimes on heating
  • Hence it is a sublimable component

 

Common salt (Sodium Chloride) 

  • Does not undergo sublimation
  • It is a non sublimable component.

Procedure

  1. Take a mixture of salt and camphor in a china dish
  2. Place an inverted funnel over it
  3. Close the end of the funnel with a cotton plug
  4. Now heat the mixture

On heating , camphor undergoes sublimation (converts into vapours)

These vapors solidify again on the surface of the funnel

However salt does not undergo sublimation and remains on the china dish

Introducing your new favourite teacher - Teachoo Black, at only ₹83 per month

CA Maninder Singh's photo - Expert in Practical Accounts, Taxation and Efiling

Made by

CA Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Accounts and English at Teachoo