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

Explanation

Aim: To separate components in the mixture of naphthalene 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 tunnel and plug the mouth of the tunnel 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 napthalene solidified on the walls of the funnel. 2) Salt remains In the China dish.