1.

How do you separate the mixture of napthaleine powder and salt powder?

Answer»

Aim : 

To separate components in the mixture of napthaleine and salt.

 Apparatus: 

China dish, cotton plug, funnel, burner. 

Method : 

Separation mixtures by sublimation. 

Procedure : 

  1. Take 4 table spoons of mixture in a China dish.
  2.  Take the glass funnel and plug the mouth of the funnel with cotton plug. 
  3.  Invert the funnel over the China dish. 
  4.  Keep the dish on the stand of stove and heat for some time. 

Observation : 

  1.  Vapours of napthaleine solidified on the walls of the funnel. 
  2.  Salt remains in the China dish.


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