Question

Describe an experiment to demonstrate the process of sublimation.

Answer 1

Experiment:

• Take some Ammonium chloride powder in a china dish.
• Cover the china dish with inverted funnel and put a cotton plug in end of funnel so that vapours do not escape. Set up the apparatus as shown.
• Heat the dish with burner. Solid ammonium chloride changes into vapours which when come in contact of walls of funnel get cooled and change to solid and get deposited there.